Pub Date : 2021-10-28DOI: 10.36347/sjet.2021.v09i09.005
Zhang Chen
This paper mainly studies the blind estimation and synthesis of frequency hopping points of speech signals based on frequency modulation in the case of frequency hopping.FM voice frequency hopping signal transmitter and receiver are built based on MATLAB platform. The transmitter FM modulates the original signal and then performs frequency hopping processing; the receiver blind estimates the frequency hopping point of the received signal.
{"title":"Research on Blind Estimation and Synthesis of FM Speech Frequency Hopping Signal","authors":"Zhang Chen","doi":"10.36347/sjet.2021.v09i09.005","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i09.005","url":null,"abstract":"This paper mainly studies the blind estimation and synthesis of frequency hopping points of speech signals based on frequency modulation in the case of frequency hopping.FM voice frequency hopping signal transmitter and receiver are built based on MATLAB platform. The transmitter FM modulates the original signal and then performs frequency hopping processing; the receiver blind estimates the frequency hopping point of the received signal.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123007368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-22DOI: 10.36347/sjet.2021.v09i09.004
M. E. Voutetaki, M. C. Naoum, N. A. Papadopoulos, George M Sapidis, C. Chalioris
This paper carried out experimental research of concrete specimens with synthetic fibres under repeated splitting tension and uniaxial compression to investigate the efficiency of a proposed health monitoring methodology that implements surface-bonded piezoelectric transducers. The developed technique uses small-sized custom-made devices for diagnosing damage due to concrete cracking caused by the imposed repeated loading at various load levels. A test program of standard 150/300 mm cylinders and 150 mm cubes made of plain and fibre reinforced concrete subjected to splitting tensile and compressive repeated loading is presented and discussed. The proposed method utilises the frequency response measurements of a network of small-sized piezoelectric patches mounted to the surface of the tested specimens in order to detect the onset of damage since cracking has probably been developed in the inner concrete, whereas no visible cracks appeared on their surface. The objectives of this study also include development of a quantitative assessment procedure of damage using the statistical index values distribution at various points of measurements. The influence of distance, type of material (plain or fibrous concrete) and damage level triggers changes in the measurements of the piezoelectric transducers and the adopted statistical index seems to be a reliable assessment tool for damage quantification. Further, for the first time, a wireless and portable structural health monitoring system display feasible detection of premature cracks for damage prognosis in fibre reinforced concrete structural members.
{"title":"Cracking Diagnosis in Fibre Reinforced Concrete Cubes and Cylinders with Synthetic Fibres using a PZT-based Health Monitoring System","authors":"M. E. Voutetaki, M. C. Naoum, N. A. Papadopoulos, George M Sapidis, C. Chalioris","doi":"10.36347/sjet.2021.v09i09.004","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i09.004","url":null,"abstract":"This paper carried out experimental research of concrete specimens with synthetic fibres under repeated splitting tension and uniaxial compression to investigate the efficiency of a proposed health monitoring methodology that implements surface-bonded piezoelectric transducers. The developed technique uses small-sized custom-made devices for diagnosing damage due to concrete cracking caused by the imposed repeated loading at various load levels. A test program of standard 150/300 mm cylinders and 150 mm cubes made of plain and fibre reinforced concrete subjected to splitting tensile and compressive repeated loading is presented and discussed. The proposed method utilises the frequency response measurements of a network of small-sized piezoelectric patches mounted to the surface of the tested specimens in order to detect the onset of damage since cracking has probably been developed in the inner concrete, whereas no visible cracks appeared on their surface. The objectives of this study also include development of a quantitative assessment procedure of damage using the statistical index values distribution at various points of measurements. The influence of distance, type of material (plain or fibrous concrete) and damage level triggers changes in the measurements of the piezoelectric transducers and the adopted statistical index seems to be a reliable assessment tool for damage quantification. Further, for the first time, a wireless and portable structural health monitoring system display feasible detection of premature cracks for damage prognosis in fibre reinforced concrete structural members.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"PAMI-9 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132968400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-21DOI: 10.36347/sjet.2021.v09i09.003
Zhang Jiao
Since mankind entered the industrial society, DC-DC converters have been used in many industries. The function of the DC-DC converter is a module that converts DC voltage into DC voltage, which can also be called a power processing system. The main content of this article is to explain the basic principles of Buck converters, and perform modeling and simulation on the MATLAB platform to prove the feasibility of expectations.
{"title":"Research on Modeling and Control Method of DC-DC Converter","authors":"Zhang Jiao","doi":"10.36347/sjet.2021.v09i09.003","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i09.003","url":null,"abstract":"Since mankind entered the industrial society, DC-DC converters have been used in many industries. The function of the DC-DC converter is a module that converts DC voltage into DC voltage, which can also be called a power processing system. The main content of this article is to explain the basic principles of Buck converters, and perform modeling and simulation on the MATLAB platform to prove the feasibility of expectations.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"733 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123859662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-18DOI: 10.36347/sjet.2021.v09i09.002
Hermawati P, B. Bahtiar
In the planned of LRT procurement for the Kuta - Ngurah Rai Airport route, it is necessary to determine the potential travel demand and passenger characteristics, so that the government and the industry involved can plan their infrastructure and facilities needs appropriately. The results analysis show that passengers are included in the choice group, meaning that almost all have private vehicles but they have high motivation for the availability of safe, comfortable and on time public transportation. Potential Demand Analysis with Stated Preference shows the highest choice is LRT/ART of Airport-Kuta-Sanur route 66.50% of passengers, the second choice using private vehicles 22.10% of passengers. The potential demand model for LRT/ART users can be well explained by the individual passengers characteristics with a significance level of 84.807%, and the effect of all variables on the model is 54.3%. The characteristics of passenger trips can also explain the model with a significance level of 87.342%, and the effect of all variables on the model is 65.8%. With this model, it is hoped that the LRT / ART type mass transit system will be able to compete with private cars, taxis or online-based public transportation.
{"title":"A Model of Passenger Demand on the Operation of LRT at Ngurah Rai Airport Corridor in Bali","authors":"Hermawati P, B. Bahtiar","doi":"10.36347/sjet.2021.v09i09.002","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i09.002","url":null,"abstract":"In the planned of LRT procurement for the Kuta - Ngurah Rai Airport route, it is necessary to determine the potential travel demand and passenger characteristics, so that the government and the industry involved can plan their infrastructure and facilities needs appropriately. The results analysis show that passengers are included in the choice group, meaning that almost all have private vehicles but they have high motivation for the availability of safe, comfortable and on time public transportation. Potential Demand Analysis with Stated Preference shows the highest choice is LRT/ART of Airport-Kuta-Sanur route 66.50% of passengers, the second choice using private vehicles 22.10% of passengers. The potential demand model for LRT/ART users can be well explained by the individual passengers characteristics with a significance level of 84.807%, and the effect of all variables on the model is 54.3%. The characteristics of passenger trips can also explain the model with a significance level of 87.342%, and the effect of all variables on the model is 65.8%. With this model, it is hoped that the LRT / ART type mass transit system will be able to compete with private cars, taxis or online-based public transportation.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116278913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-09DOI: 10.36347/sjet.2021.v09i09.001
Jayatirtha M. Patil, Mahendra Kv, G. M.
The congregation of ceramic particulates in Aluminum hybrid metal matrix composites induces a greater significance in marine and automotive engineering applications because of its strength to weight ratio, good anti-corrosive properties, and high-temperature resistance. The research work focuses on the fabrication of hybrid metal matrix composite with influences of hard ceramic particulates like silicon carbide and dispersoid of graphite in Al-3Mg matrix material, and tribology behavior routed through the liquid metallurgical vortex method. The characterizations of conglomerate like, tensile properties, hardness, compression tests were investigated. The wear resistance increases with assorted graphite compositions. Microstructural examination shows the dispersoids of graphite and silicon carbides are uniformly distributed. The test results of Al-3Mg conglomerates reveal that tensile and hardness properties were enhanced with the addition of Gr. & SiC, as silicon carbide being a harder constituent mixed with a ductile matrix.
{"title":"Development & Fabrication of AL-3Mg Based SiC & Gr. Hybrid Metal Matrix Composite by Stir Casting Method","authors":"Jayatirtha M. Patil, Mahendra Kv, G. M.","doi":"10.36347/sjet.2021.v09i09.001","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i09.001","url":null,"abstract":"The congregation of ceramic particulates in Aluminum hybrid metal matrix composites induces a greater significance in marine and automotive engineering applications because of its strength to weight ratio, good anti-corrosive properties, and high-temperature resistance. The research work focuses on the fabrication of hybrid metal matrix composite with influences of hard ceramic particulates like silicon carbide and dispersoid of graphite in Al-3Mg matrix material, and tribology behavior routed through the liquid metallurgical vortex method. The characterizations of conglomerate like, tensile properties, hardness, compression tests were investigated. The wear resistance increases with assorted graphite compositions. Microstructural examination shows the dispersoids of graphite and silicon carbides are uniformly distributed. The test results of Al-3Mg conglomerates reveal that tensile and hardness properties were enhanced with the addition of Gr. & SiC, as silicon carbide being a harder constituent mixed with a ductile matrix.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123436598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-01DOI: 10.36347/sjet.2021.v09i08.001
Mugova A. K, Zvidzai C. J, Musundire R
Acanthoplus discoidalis is an insect that has potential use in new product development because of its nutritional quality. This study focused on function properties of A. discoidalis flour. Protein solubility, bulk density, water and oil holding capacity and foaming and emulsifying properties were determined. Protein solubility values of A. discoidalis protein extract at different temperatures were minimum at pH 5. After sieving of the ground flour, the highest retention yields for both the oven dried and sun dried insect flour were observed at mesh size 150µm thus, 47 % and 45 % respectively. Bulk density ranged from 52.33 to 82.67g/mL. Water holding capacity values ranged from 236 to 183.73g/g. A comparison between the water holding capacity with relation to mesh size revealed that the finer the flour, the lower the water binding capacity. No significant difference (p < 0.05) was observed between water holding capacity of the protein isolate and oven dried A. discoidalis flour ground to 500µm. Oil holding capacity of A. discoidalis flour ranged from 110.57 to 179.67g/g. Significant differences (p < 0.05) for oil holding capacity were observed between air dried and sun dried flour samples. Foaming capacity values of A. discoidalis flour ranged from 4 to 33.83%. Foaming capacity decreased with an increase in mesh size for both the oven dried and sun dried flour samples. No significant difference (p < 0.05) was observed between foaming stability of the protein isolate and that of sun dried flour ground to 300 and 500µm. Emulsion capacity and emulsion stability values ranged from 43.33 to 84.07% and 24.73 to 41.83% respectively. The obtained results could be valuable to industries that would want to take up A. discoidalis in their formulation of improved foods and feeds. Insect flours are rich in protein, good extenders, good thickeners and good gelling agents.
{"title":"Techno-functional Properties of Armoured Cricket (Acanthoplus discoidalis) Flour","authors":"Mugova A. K, Zvidzai C. J, Musundire R","doi":"10.36347/sjet.2021.v09i08.001","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i08.001","url":null,"abstract":"Acanthoplus discoidalis is an insect that has potential use in new product development because of its nutritional quality. This study focused on function properties of A. discoidalis flour. Protein solubility, bulk density, water and oil holding capacity and foaming and emulsifying properties were determined. Protein solubility values of A. discoidalis protein extract at different temperatures were minimum at pH 5. After sieving of the ground flour, the highest retention yields for both the oven dried and sun dried insect flour were observed at mesh size 150µm thus, 47 % and 45 % respectively. Bulk density ranged from 52.33 to 82.67g/mL. Water holding capacity values ranged from 236 to 183.73g/g. A comparison between the water holding capacity with relation to mesh size revealed that the finer the flour, the lower the water binding capacity. No significant difference (p < 0.05) was observed between water holding capacity of the protein isolate and oven dried A. discoidalis flour ground to 500µm. Oil holding capacity of A. discoidalis flour ranged from 110.57 to 179.67g/g. Significant differences (p < 0.05) for oil holding capacity were observed between air dried and sun dried flour samples. Foaming capacity values of A. discoidalis flour ranged from 4 to 33.83%. Foaming capacity decreased with an increase in mesh size for both the oven dried and sun dried flour samples. No significant difference (p < 0.05) was observed between foaming stability of the protein isolate and that of sun dried flour ground to 300 and 500µm. Emulsion capacity and emulsion stability values ranged from 43.33 to 84.07% and 24.73 to 41.83% respectively. The obtained results could be valuable to industries that would want to take up A. discoidalis in their formulation of improved foods and feeds. Insect flours are rich in protein, good extenders, good thickeners and good gelling agents.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133171988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-29DOI: 10.36347/sjet.2021.v09i07.003
Parves M, Islam Ms, Biswas Sk
The study deals with the assessment of wastewater irrigation practices and soil properties in connection with demographic information, availability of water sources, health hazards and the benefit-cost analysis in the Gazipur district of Bangladesh. A questionnaire survey was carried out to collect data on farmers' perceptions and responses to mainly agricultural production issues. It found that most respondents used wastewater because they had no alternative sources and sank their land during rush hour as well as the rainy season due to the lack of a proper wastewater disposal system by adjacent industries. The majority of respondents had skin problems from working with wastewater. No significant benefits were found from using direct wastewater in the fields. Irrigation costs could be reduced, however, fertilizer costs as well as the total cost of plant production were not adequate. The farmers did not get as much grown grain as they wanted. In addition, indirect wastewater users were rated better compared to direct users from the drainage canal. Farmers' perception showed that no major impact on the consumption of crops was noted, but rather the long-term use of wastewater in the field, which gradually reduced crop production and affected soil fertility. To evaluate Ca ++, Mg ++, K +, N, P, Cu, Pb, Cd and Ni from the investigation area; It was examined that the concentration of N, P and Cd was much higher than the standard limit. The heavy metal concentration series were as follows: Cd
{"title":"Assessment of Wastewater Irrigation Practices and Soil Properties in the Gazipur District of Bangladesh","authors":"Parves M, Islam Ms, Biswas Sk","doi":"10.36347/sjet.2021.v09i07.003","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i07.003","url":null,"abstract":"The study deals with the assessment of wastewater irrigation practices and soil properties in connection with demographic information, availability of water sources, health hazards and the benefit-cost analysis in the Gazipur district of Bangladesh. A questionnaire survey was carried out to collect data on farmers' perceptions and responses to mainly agricultural production issues. It found that most respondents used wastewater because they had no alternative sources and sank their land during rush hour as well as the rainy season due to the lack of a proper wastewater disposal system by adjacent industries. The majority of respondents had skin problems from working with wastewater. No significant benefits were found from using direct wastewater in the fields. Irrigation costs could be reduced, however, fertilizer costs as well as the total cost of plant production were not adequate. The farmers did not get as much grown grain as they wanted. In addition, indirect wastewater users were rated better compared to direct users from the drainage canal. Farmers' perception showed that no major impact on the consumption of crops was noted, but rather the long-term use of wastewater in the field, which gradually reduced crop production and affected soil fertility. To evaluate Ca ++, Mg ++, K +, N, P, Cu, Pb, Cd and Ni from the investigation area; It was examined that the concentration of N, P and Cd was much higher than the standard limit. The heavy metal concentration series were as follows: Cd <Cu <Ni <Pb. In summary, the overall results of the study suggest that untreated or partially treated wastewater will slowly affect land and crop production in the long run.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130862180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-25DOI: 10.36347/sjet.2021.v09i08.002
Yasir Usman, Khizar Jahangir, A. Shah, M. Yousaf, A. Samad, A. U. Din, Ghazi Aman Nowsherwan
The high strength of organic photovoltaic cells lies in the variety of organic ingredients that can be built and synthesized for absorbers, receptors, and boundaries. Still, we need further development for better performance and existence of the system. In this research study, electrical simulations of different active layer materials have been performed via GPVDM software to observe the outcomes of a solar cell. Furthermore, the electrical simulation has been performed at different active layer thicknesses from 50 nm to 300 nm with active material P3HT: PC70BM. We analyzed by performing simulations with different parameters to observe the best parameters for organic solar cell performance. We observed that absorber layer thickness of 200 nm, hole transport layer of Cu2O, pair of ITO/Al electrodes, and exponential DOS exhibit superior outcomes. At the same time, the highest power conversion efficiency was reported with active layer PTB7:PCB70BM due to its efficient optical properties. Organic solar cells are versatile and gaining popularity for a broad range of applications to keep up with the increasing energy demand and comparatively lower energy payback time.
{"title":"Comparative Simulation-Based Study on Different Active Layers of Organic Solar Cell via GPVDM","authors":"Yasir Usman, Khizar Jahangir, A. Shah, M. Yousaf, A. Samad, A. U. Din, Ghazi Aman Nowsherwan","doi":"10.36347/sjet.2021.v09i08.002","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i08.002","url":null,"abstract":"The high strength of organic photovoltaic cells lies in the variety of organic ingredients that can be built and synthesized for absorbers, receptors, and boundaries. Still, we need further development for better performance and existence of the system. In this research study, electrical simulations of different active layer materials have been performed via GPVDM software to observe the outcomes of a solar cell. Furthermore, the electrical simulation has been performed at different active layer thicknesses from 50 nm to 300 nm with active material P3HT: PC70BM. We analyzed by performing simulations with different parameters to observe the best parameters for organic solar cell performance. We observed that absorber layer thickness of 200 nm, hole transport layer of Cu2O, pair of ITO/Al electrodes, and exponential DOS exhibit superior outcomes. At the same time, the highest power conversion efficiency was reported with active layer PTB7:PCB70BM due to its efficient optical properties. Organic solar cells are versatile and gaining popularity for a broad range of applications to keep up with the increasing energy demand and comparatively lower energy payback time.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"375 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124688307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-17DOI: 10.36347/sjet.2021.v09i07.002
Akusu Om, Akinfaloye Oa
The article describes a research which is focused on the design and construction of a portable boiler. This is to enhance energy system in Africa and the world at large. Water at atmospheric pressure of 1.613252bar, 25°c was supplied to the pressure to an absolute pressure of 4.5bar, a burner and liquefied petroleum gas (LPG) were used to supply heat to the boiler that raised the water at the copper piping to a saturation temperature or 147.9°c there by producing steam. During testing 0.5kg of gas was burnt for 25min and the wet steam generated at the exist pipe was at a gauge pressure of 3.2bar. The steam generated find application in textile industries for sizing and bleaching, sugar mills, chemical industries and production of hot water for hot water supply. In conclusion, the developed modular boiler is efficient and effective at optimal working condition.
{"title":"Design and Construction of a Portable Boiler","authors":"Akusu Om, Akinfaloye Oa","doi":"10.36347/sjet.2021.v09i07.002","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i07.002","url":null,"abstract":"The article describes a research which is focused on the design and construction of a portable boiler. This is to enhance energy system in Africa and the world at large. Water at atmospheric pressure of 1.613252bar, 25°c was supplied to the pressure to an absolute pressure of 4.5bar, a burner and liquefied petroleum gas (LPG) were used to supply heat to the boiler that raised the water at the copper piping to a saturation temperature or 147.9°c there by producing steam. During testing 0.5kg of gas was burnt for 25min and the wet steam generated at the exist pipe was at a gauge pressure of 3.2bar. The steam generated find application in textile industries for sizing and bleaching, sugar mills, chemical industries and production of hot water for hot water supply. In conclusion, the developed modular boiler is efficient and effective at optimal working condition.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131408346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-01DOI: 10.36347/sjet.2021.v09i07.001
R. Mehta
This paper presents an inverse analysis to estimate angle of attack during ascent period of a satellite launch vehicle. Aerodynamic results are numerically computed by solving three dimensional, time dependent, compressible inviscid equations over payload shroud of a satellite launch vehicle. The flush air data system consists of four pressure ports flushed with conical-nose section of the payload fairing and connected to on board differential pressure transducers. The inverse algorithm uses calibrations charts which based on computed and measured data. A controlled random search method is used to predict pitch, yaw and total angle of attack of vehicle from measured transient differential pressure history in flight from Mach numbers range of 0.5 to 3.0. The algorithm predicts the flow direction stepwise with function of flight Mach numbers and can be termed as online method. Flow direction of the launch vehicle is compared with the reconstructed trajectory data. The estimated values of the flow direction are found in good agreement them.
{"title":"Estimation of Angle of Attack in Satellite Launch Vehicle Using Flush Air Data Sensing Systems at Mach 0.5 to 3.0","authors":"R. Mehta","doi":"10.36347/sjet.2021.v09i07.001","DOIUrl":"https://doi.org/10.36347/sjet.2021.v09i07.001","url":null,"abstract":"This paper presents an inverse analysis to estimate angle of attack during ascent period of a satellite launch vehicle. Aerodynamic results are numerically computed by solving three dimensional, time dependent, compressible inviscid equations over payload shroud of a satellite launch vehicle. The flush air data system consists of four pressure ports flushed with conical-nose section of the payload fairing and connected to on board differential pressure transducers. The inverse algorithm uses calibrations charts which based on computed and measured data. A controlled random search method is used to predict pitch, yaw and total angle of attack of vehicle from measured transient differential pressure history in flight from Mach numbers range of 0.5 to 3.0. The algorithm predicts the flow direction stepwise with function of flight Mach numbers and can be termed as online method. Flow direction of the launch vehicle is compared with the reconstructed trajectory data. The estimated values of the flow direction are found in good agreement them.","PeriodicalId":379926,"journal":{"name":"Scholars Journal of Engineering and Technology","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134189630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：