Pub Date : 2019-08-01DOI: 10.1109/ICAEM.2019.8853741
Muhammad Waleed Khan, M. Abid, Abdul Qayyum Khan
In this paper, the blood glucose-insulin system in the human body is discussed. Different mathematical models representing this system are presented. MATLAB is used for solution and simulation of each of these models. On the basis of credible experimental data, comparison of these models is done. The results show that the system of glucose-insulin is better described by nonlinear Bergman's model than the linear model. Furthermore, utilizing fractional calculus, integer order nonlinear Bergman's model is modified to fractional order model. It is shown through simulations and comparison of data that the modified fractional order nonlinear Bergman's minimal model gives better representation compared to the integer order nonlinear model.
{"title":"Fractional Order Bergman's Minimal Model-A Better Representation of Blood Glucose-Insulin System","authors":"Muhammad Waleed Khan, M. Abid, Abdul Qayyum Khan","doi":"10.1109/ICAEM.2019.8853741","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853741","url":null,"abstract":"In this paper, the blood glucose-insulin system in the human body is discussed. Different mathematical models representing this system are presented. MATLAB is used for solution and simulation of each of these models. On the basis of credible experimental data, comparison of these models is done. The results show that the system of glucose-insulin is better described by nonlinear Bergman's model than the linear model. Furthermore, utilizing fractional calculus, integer order nonlinear Bergman's model is modified to fractional order model. It is shown through simulations and comparison of data that the modified fractional order nonlinear Bergman's minimal model gives better representation compared to the integer order nonlinear model.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122067440","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853661
Aqib Mehmood, Hassan Jamal
Corona Discharge (CD) in high tension wires is often considered as loss in the form of power loss, insulation failure and audible noise. The present study aims at showing the ability of CD to be used as Ionic Thruster (IT) in an electrode combination. Individual experiments were conducted on each set of electrodes (plate to plate, sphere to sphere, wire to plate & sphere to plate) with three distinct High Voltage (HV) sources (Neon Sign Transformer (NST), Cockcroft Walton Multiplier (CWM) and fly back transformer) to analyze and compare their effect on the ionic wind propulsion. After comparing the developed mathematical models for electric field and mechanical characteristics of 12 combinations of electrodes with HV sources, it highlight that the best geometrical configuration is the wire to plate Dielectric Barrier Discharge (DBD). It allows to induce ionic wind jet with max velocity of 3.75 m/s with potential radius of 176 mm. This article had also fruitful results for future research and development in the field of ionic propulsion, medical treatment of asthma patients and cooling methods for electronic devices.
{"title":"Analysis on the Propulsion of Ionic Wind During Corona Discharge in Various Electrode Configuration with High Voltage Sources","authors":"Aqib Mehmood, Hassan Jamal","doi":"10.1109/ICAEM.2019.8853661","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853661","url":null,"abstract":"Corona Discharge (CD) in high tension wires is often considered as loss in the form of power loss, insulation failure and audible noise. The present study aims at showing the ability of CD to be used as Ionic Thruster (IT) in an electrode combination. Individual experiments were conducted on each set of electrodes (plate to plate, sphere to sphere, wire to plate & sphere to plate) with three distinct High Voltage (HV) sources (Neon Sign Transformer (NST), Cockcroft Walton Multiplier (CWM) and fly back transformer) to analyze and compare their effect on the ionic wind propulsion. After comparing the developed mathematical models for electric field and mechanical characteristics of 12 combinations of electrodes with HV sources, it highlight that the best geometrical configuration is the wire to plate Dielectric Barrier Discharge (DBD). It allows to induce ionic wind jet with max velocity of 3.75 m/s with potential radius of 176 mm. This article had also fruitful results for future research and development in the field of ionic propulsion, medical treatment of asthma patients and cooling methods for electronic devices.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133351086","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853745
B. Ahmad, Z. Iqbal, K. M. Abbasi
This flow configuration spotlights to study viscoelastic nanofluidic flow over a vertical Riga plate influenced by mass flux condition. Constitutive laws of motion and energy is employed to formulate the problem. The physical model governs the nonlinear PDE's with suitable boundary conditions. In order to aid computation process, the nonlinear partial differential equations are converted into the system of ordinary differential equations with the help of appropriate group of scaling transformation. Shooting technique is used to get the numerical solution of the dimensionless problem. Velocity, temperature and concentration distribution is explored for various parametric situations. The influences of main parameters are emphasized via graphically.
{"title":"Performance of Internal Heat generation on Viscoelastic Nanofluidic Flow past a Heated Variable Riga-Plate","authors":"B. Ahmad, Z. Iqbal, K. M. Abbasi","doi":"10.1109/ICAEM.2019.8853745","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853745","url":null,"abstract":"This flow configuration spotlights to study viscoelastic nanofluidic flow over a vertical Riga plate influenced by mass flux condition. Constitutive laws of motion and energy is employed to formulate the problem. The physical model governs the nonlinear PDE's with suitable boundary conditions. In order to aid computation process, the nonlinear partial differential equations are converted into the system of ordinary differential equations with the help of appropriate group of scaling transformation. Shooting technique is used to get the numerical solution of the dimensionless problem. Velocity, temperature and concentration distribution is explored for various parametric situations. The influences of main parameters are emphasized via graphically.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131462670","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853773
Sheryar Mehmood Awan, S. Khattak, Gul Zameen Khan, Z. Mahmood
Automatic License Plate Detection (ALPD) is a crucial step, which significantly affects the recognition rate and speed of the Intelligent Transport System (ITS). This paper presents a robust license plate detection method using an intelligent combination of Faster R-CNN and image processing operations. In the proposed method, initially, a vehicle is detected in the input colored RGB images using the Faster R-CNN. Next, the image with detected vehicle is fed to our developed License Plate Localization Module (LPLM) to search the possible existence of the license plate. The LPLM converts the detected vehicle image from RGB to the HSV domain and applies color segmentation along with morphological operations, and finally uses the dimensions analysis to locate the license plate. Simulations on the challenging PKU dataset reveal that the proposed technique outperforms recent state-of-the-art methods in terms of detection accuracy, precision, recall, and execution time.
{"title":"A Robust Method to Locate License Plates under Diverse Conditions","authors":"Sheryar Mehmood Awan, S. Khattak, Gul Zameen Khan, Z. Mahmood","doi":"10.1109/ICAEM.2019.8853773","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853773","url":null,"abstract":"Automatic License Plate Detection (ALPD) is a crucial step, which significantly affects the recognition rate and speed of the Intelligent Transport System (ITS). This paper presents a robust license plate detection method using an intelligent combination of Faster R-CNN and image processing operations. In the proposed method, initially, a vehicle is detected in the input colored RGB images using the Faster R-CNN. Next, the image with detected vehicle is fed to our developed License Plate Localization Module (LPLM) to search the possible existence of the license plate. The LPLM converts the detected vehicle image from RGB to the HSV domain and applies color segmentation along with morphological operations, and finally uses the dimensions analysis to locate the license plate. Simulations on the challenging PKU dataset reveal that the proposed technique outperforms recent state-of-the-art methods in terms of detection accuracy, precision, recall, and execution time.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131385495","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853654
Muhammad Jahangir, M. Rehman, A. B. Awan, Raja Hamza Ali
With the increasing rate of air pollution in whole world, the duration of summer season is increasing day by day and with the passage of time the daytime temperature is also increasing. Now it is becoming very difficult to work under the sunlight in hot summer days therefore, we proposed an idea of a cooling jacket which consists of peltier plate along with heat sinks and small DC fans, whenever current passes through the Peltier plate it produces cooling and fan circulates the cold air inside the jacket. Solar strip is attached on the upper layer of jacket to power up the system and the peltier current control circuitry is controlled using lilypad arduino. The goal is achieved successfully, maintaining the inside temperature of jacket within the range of 25–30°C with outside temperature around 35–45°C.
{"title":"Design and Testing of Cooling Jacket using Peltier Plate","authors":"Muhammad Jahangir, M. Rehman, A. B. Awan, Raja Hamza Ali","doi":"10.1109/ICAEM.2019.8853654","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853654","url":null,"abstract":"With the increasing rate of air pollution in whole world, the duration of summer season is increasing day by day and with the passage of time the daytime temperature is also increasing. Now it is becoming very difficult to work under the sunlight in hot summer days therefore, we proposed an idea of a cooling jacket which consists of peltier plate along with heat sinks and small DC fans, whenever current passes through the Peltier plate it produces cooling and fan circulates the cold air inside the jacket. Solar strip is attached on the upper layer of jacket to power up the system and the peltier current control circuitry is controlled using lilypad arduino. The goal is achieved successfully, maintaining the inside temperature of jacket within the range of 25–30°C with outside temperature around 35–45°C.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128813751","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853749
Muhammad Yasir Hussain, H. Ali, M. Aneeq, K. A. Sheikh, S. Rehman
Increasing energy demands along with the exhaustion of conventional fuel resources, pollution and global warming governed the use of renewable energy resources. Solar energy is very commonly used because of the ease of availability, sustainable properties and having very less impact on the environment. To convert solar energy into thermal energy, FPCs are extensively used due to compatibility with small and medium size applications but they are found to be less efficient. To increase solar collector's performance Nano fluids can be used. So, in this work, optical and thermal analysis of a FPC was done numerically, by using water and alumina nano fluids for the weather conditions of Taxila, Pakistan. It is observed that the use of Nano fluids in FPC improves the useful heat gain and efficiency as compared to water.
{"title":"Optical and Thermal Analysis of a Flat Plate Solar Collector Using Water and Alumina Nano Fluids","authors":"Muhammad Yasir Hussain, H. Ali, M. Aneeq, K. A. Sheikh, S. Rehman","doi":"10.1109/ICAEM.2019.8853749","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853749","url":null,"abstract":"Increasing energy demands along with the exhaustion of conventional fuel resources, pollution and global warming governed the use of renewable energy resources. Solar energy is very commonly used because of the ease of availability, sustainable properties and having very less impact on the environment. To convert solar energy into thermal energy, FPCs are extensively used due to compatibility with small and medium size applications but they are found to be less efficient. To increase solar collector's performance Nano fluids can be used. So, in this work, optical and thermal analysis of a FPC was done numerically, by using water and alumina nano fluids for the weather conditions of Taxila, Pakistan. It is observed that the use of Nano fluids in FPC improves the useful heat gain and efficiency as compared to water.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131150965","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853788
A. Hassan, Shahzaib Tahir, Ahmed Iftikhar Baig
Increase in cybercrimes in the last few years has dramatically increased the need for the network intrusion detection and subsequently its mitigation. Several classified intrusion detection systems (IDS) are currently in use but increase in dynamics of the cyber invasion hunts for more adaptive and intelligent model. This research covers the critical analysis and comparison of the Machine Learning (ML) network intrusion detection techniques, their use cases and proposes an unsupervised and fast ML implementation model for intrusion detection. The proposed model works on anomaly-based detection. ELK stack (Elasticsearch, Logstash and Kibana) has been used for unsupervised implementation model for exodus DNS requests in a wired network
{"title":"Unsupervised Machine Learning for Malicious Network Activities","authors":"A. Hassan, Shahzaib Tahir, Ahmed Iftikhar Baig","doi":"10.1109/ICAEM.2019.8853788","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853788","url":null,"abstract":"Increase in cybercrimes in the last few years has dramatically increased the need for the network intrusion detection and subsequently its mitigation. Several classified intrusion detection systems (IDS) are currently in use but increase in dynamics of the cyber invasion hunts for more adaptive and intelligent model. This research covers the critical analysis and comparison of the Machine Learning (ML) network intrusion detection techniques, their use cases and proposes an unsupervised and fast ML implementation model for intrusion detection. The proposed model works on anomaly-based detection. ELK stack (Elasticsearch, Logstash and Kibana) has been used for unsupervised implementation model for exodus DNS requests in a wired network","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132677486","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853743
A. Javed, M. I. Ahmad
Biochemical systems represent a process that involves different biological species linked by a network of chemical reactions. This particular paper focuses on modeling and analysis (computer simulation) of biochemical systems. The problem with mathematical models is, their complexity. Numerical simulation of such complex models is computationally expensive. Model order reduction can be utilized to tackle this issue of complexity by eliminating those parts of a reaction network that do not contribute up to the mark in our parameters of interest. In this paper, we are using an important projection based model reduction technique, called IRKA, for model reduction of biochemical systems. The results of IRKA are compared with lumping, which is a common reduction technique for chemical reactions. It is observed that the approximation error through IRKA is much less as compared to the lumping technique.
{"title":"Projection-Based Model Order Reduction for Biochemical Systems","authors":"A. Javed, M. I. Ahmad","doi":"10.1109/ICAEM.2019.8853743","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853743","url":null,"abstract":"Biochemical systems represent a process that involves different biological species linked by a network of chemical reactions. This particular paper focuses on modeling and analysis (computer simulation) of biochemical systems. The problem with mathematical models is, their complexity. Numerical simulation of such complex models is computationally expensive. Model order reduction can be utilized to tackle this issue of complexity by eliminating those parts of a reaction network that do not contribute up to the mark in our parameters of interest. In this paper, we are using an important projection based model reduction technique, called IRKA, for model reduction of biochemical systems. The results of IRKA are compared with lumping, which is a common reduction technique for chemical reactions. It is observed that the approximation error through IRKA is much less as compared to the lumping technique.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130245740","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853695
M. Iqbal, Syed Irtiza Ali Shah, Ali Hassan
The use of Gurney flap for improving lift to drag ratio of airfoils has remained a success over the past years. Although its implementation on airfoil successfully enhances lift characteristics, however, it also creates additional drag by hindering the flow. Therefore, minimization of its drag penalty is an active area of research for enhancing its effectiveness. Techniques such as modifications in its shape, size and placement position has been incorporated in its design. These techniques lower the surplus drag of Gurney flap but it is not a significant decrease. Thus keeping the need of hour in view, this endeavor has been put in to minimize the drag penalty imposed on the installation of gurney flap. A shape modification has been analyzed and successfully proposed to maximize lift to drag ratio of the airfoil with gurney flap. The idea is to introduce the porosity in the gurney flap so as to minimize the stagnation pressure loss. The flow patterns and aerodynamic parameters have been evaluated and plotted using CFD techniques in ANSYS FLUENT software. The analysis has been done with various porosity levels on the flap height of 0.5, 1, 1.5, 2 and 3% of the chord. The results and the characteristics behavior have been compared and verified from with published results. From analysis it has been found that the most effective gurney flap configration is of height equal to 2-3% of the chord with 20% porosity. This analysis could be used as a guideline in development of better and effective design of Gurney Flap being used in aerospace industry.
{"title":"CFD Analysis of NACA-0012 Airfoil with Various Porous Gurney Flap Geometries","authors":"M. Iqbal, Syed Irtiza Ali Shah, Ali Hassan","doi":"10.1109/ICAEM.2019.8853695","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853695","url":null,"abstract":"The use of Gurney flap for improving lift to drag ratio of airfoils has remained a success over the past years. Although its implementation on airfoil successfully enhances lift characteristics, however, it also creates additional drag by hindering the flow. Therefore, minimization of its drag penalty is an active area of research for enhancing its effectiveness. Techniques such as modifications in its shape, size and placement position has been incorporated in its design. These techniques lower the surplus drag of Gurney flap but it is not a significant decrease. Thus keeping the need of hour in view, this endeavor has been put in to minimize the drag penalty imposed on the installation of gurney flap. A shape modification has been analyzed and successfully proposed to maximize lift to drag ratio of the airfoil with gurney flap. The idea is to introduce the porosity in the gurney flap so as to minimize the stagnation pressure loss. The flow patterns and aerodynamic parameters have been evaluated and plotted using CFD techniques in ANSYS FLUENT software. The analysis has been done with various porosity levels on the flap height of 0.5, 1, 1.5, 2 and 3% of the chord. The results and the characteristics behavior have been compared and verified from with published results. From analysis it has been found that the most effective gurney flap configration is of height equal to 2-3% of the chord with 20% porosity. This analysis could be used as a guideline in development of better and effective design of Gurney Flap being used in aerospace industry.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130243288","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 : 2019-08-01DOI: 10.1109/ICAEM.2019.8853758
Ammar Hussain Farooqi, Syed Irtiza Ali Shah
The thrust of an aircraft or rocket engine is largely dependent upon the momentum imparted to the products of combustion by discharging them through an exhaust nozzle. The design of an exhaust nozzle has special importance in determining the thrust and performance of an aircraft / rocket. In recent years, the design of the exhaust nozzle has received considerable attention as it directly impacts the overall performance. The aim of this paper is to study the behavior of a velocity field at the exit cross section of an elliptical nozzle. In this regard, an algorithm has been developed using the governing equations to compute the velocity at the exit of an elliptic exhaust nozzle for various aspect ratios and widths. The algorithm also provides the maximum Mach number at the exit. Subsequently plotting of Mach number contours for a range of aspect ratios is carried out. Flow is assumed to be moving under the influence of a pressure gradient. The analysis of velocity profile at exit plane of an elliptical nozzle in subsonic, supersonic and hypersonic regime is carried out which provides an understanding of the behavior of flow with variation in aspect ratio or width of an elliptical exhaust nozzle. The velocity profile obtained from algorithm for different aspect ratio and width is then compared to find the optimal design. The criteria for the optimal design of an elliptical exhaust nozzle is delivering the maximum exhaust velocity and thus thrust which is of prime importance in the design of an aircraft exhaust nozzle. This exhaust velocity, leading to thrust, is dependent mainly on the configuration of the nozzle walls i.e. geometry of the exhaust nozzle. In future, experimental validation of these results is suggested using the wind tunnel and also through computational techniques. The same approach can be used to study exhaust nozzles of varying cross sections for example triangular, square, rectangular, circular etc. The study will help in the development of optimized aircraft exhaust nozzles for future advanced aircraft.
{"title":"Coding and velocity profile analysis of an elliptical exhaust nozzle","authors":"Ammar Hussain Farooqi, Syed Irtiza Ali Shah","doi":"10.1109/ICAEM.2019.8853758","DOIUrl":"https://doi.org/10.1109/ICAEM.2019.8853758","url":null,"abstract":"The thrust of an aircraft or rocket engine is largely dependent upon the momentum imparted to the products of combustion by discharging them through an exhaust nozzle. The design of an exhaust nozzle has special importance in determining the thrust and performance of an aircraft / rocket. In recent years, the design of the exhaust nozzle has received considerable attention as it directly impacts the overall performance. The aim of this paper is to study the behavior of a velocity field at the exit cross section of an elliptical nozzle. In this regard, an algorithm has been developed using the governing equations to compute the velocity at the exit of an elliptic exhaust nozzle for various aspect ratios and widths. The algorithm also provides the maximum Mach number at the exit. Subsequently plotting of Mach number contours for a range of aspect ratios is carried out. Flow is assumed to be moving under the influence of a pressure gradient. The analysis of velocity profile at exit plane of an elliptical nozzle in subsonic, supersonic and hypersonic regime is carried out which provides an understanding of the behavior of flow with variation in aspect ratio or width of an elliptical exhaust nozzle. The velocity profile obtained from algorithm for different aspect ratio and width is then compared to find the optimal design. The criteria for the optimal design of an elliptical exhaust nozzle is delivering the maximum exhaust velocity and thus thrust which is of prime importance in the design of an aircraft exhaust nozzle. This exhaust velocity, leading to thrust, is dependent mainly on the configuration of the nozzle walls i.e. geometry of the exhaust nozzle. In future, experimental validation of these results is suggested using the wind tunnel and also through computational techniques. The same approach can be used to study exhaust nozzles of varying cross sections for example triangular, square, rectangular, circular etc. The study will help in the development of optimized aircraft exhaust nozzles for future advanced aircraft.","PeriodicalId":304208,"journal":{"name":"2019 International Conference on Applied and Engineering Mathematics (ICAEM)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129695255","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}
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