BTR code (Beam Transmission with Re-ionization) is used for NBI beamlines design and studies since 2005. Initially tailored for beam re-ionized particles tracking in neutral beam ducts, BTR finally became a universal tool for 3D geometry optimization and thermal loads evaluation in injectors’ beamlines. BTR simulations include all variety of neutral beam formation and transport conditions - from the ion beam extraction grid of the ion beam source. From the very beginning BTR is created for public usage, and it comes with a truly interactive User-friendly interface (Windows GUI). The beam tracing model is straight-forward and deterministic, it is replicable and easily cross-checked with other beam tracking codes, including analytical models. BTR standard beam is a regular array of beamlets; their spatial positions, focusing and inner angular distributions are reproduced with high resolution: up to 105 test particles per beamlet. The particles are tracked in electromagnetic fields, with their transforming on gas and plasma targets, including neutralization, ionization in gas or plasma, etc. The accurate 6D (space+velocity) statistics allows a precise evaluation of beam direct losses; power deposition profiles are delivered with high resolution at the beamline components; the total amount of maps can reach several hundreds. BTR is parallel and able to trace up to 1010 macro-particles within few hours on average Windows machine, with the best performance achieved on 4-8-processor systems. Today BTR is a lively and evolving code, and free support is available to all the Users. Basic applications of BTR code are shown – with a focus on the conventional, Single-Run versions. The information on BTR upgrades and code manuals can be found online.
{"title":"BTR code for NBI design and optimization","authors":"E. Dlougach","doi":"10.1063/5.0057499","DOIUrl":"https://doi.org/10.1063/5.0057499","url":null,"abstract":"BTR code (Beam Transmission with Re-ionization) is used for NBI beamlines design and studies since 2005. Initially tailored for beam re-ionized particles tracking in neutral beam ducts, BTR finally became a universal tool for 3D geometry optimization and thermal loads evaluation in injectors’ beamlines. BTR simulations include all variety of neutral beam formation and transport conditions - from the ion beam extraction grid of the ion beam source. From the very beginning BTR is created for public usage, and it comes with a truly interactive User-friendly interface (Windows GUI). The beam tracing model is straight-forward and deterministic, it is replicable and easily cross-checked with other beam tracking codes, including analytical models. BTR standard beam is a regular array of beamlets; their spatial positions, focusing and inner angular distributions are reproduced with high resolution: up to 105 test particles per beamlet. The particles are tracked in electromagnetic fields, with their transforming on gas and plasma targets, including neutralization, ionization in gas or plasma, etc. The accurate 6D (space+velocity) statistics allows a precise evaluation of beam direct losses; power deposition profiles are delivered with high resolution at the beamline components; the total amount of maps can reach several hundreds. BTR is parallel and able to trace up to 1010 macro-particles within few hours on average Windows machine, with the best performance achieved on 4-8-processor systems. Today BTR is a lively and evolving code, and free support is available to all the Users. Basic applications of BTR code are shown – with a focus on the conventional, Single-Run versions. The information on BTR upgrades and code manuals can be found online.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"13 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76027052","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}
One of the oldest problems in computational biology is biological sequences in which similar portion of two DNA sequence is searched. Global alignment is designed for the same and Longest Common Subsequence (LCS), one of the most basic algorithms in the field of computer science, provides the best solution global alignment irrespective of the shape of its input sequences. The Longest common Subsequence problem with a variable number of strings is variable and strictly more than 2 is known as Multiple Longest Common Subsequence problem (MLCS) and it is an NP-hard problem. Dynamic Programming Algorithm can be employed to solve the same within polynomial time provided the number of strings is known. In this work, using python GUI-library tkinter, the GUI has been built with the code of the LCS problem embedded within the GUI application. This would not only help to see how the strings are being matched inside the program but also the way the optimal solution is produced.
{"title":"Graphic user interface based implementation of longest common subsequence problem in DNA sequencing","authors":"Arpan Kumar, Sarbajit Manna","doi":"10.1063/5.0057916","DOIUrl":"https://doi.org/10.1063/5.0057916","url":null,"abstract":"One of the oldest problems in computational biology is biological sequences in which similar portion of two DNA sequence is searched. Global alignment is designed for the same and Longest Common Subsequence (LCS), one of the most basic algorithms in the field of computer science, provides the best solution global alignment irrespective of the shape of its input sequences. The Longest common Subsequence problem with a variable number of strings is variable and strictly more than 2 is known as Multiple Longest Common Subsequence problem (MLCS) and it is an NP-hard problem. Dynamic Programming Algorithm can be employed to solve the same within polynomial time provided the number of strings is known. In this work, using python GUI-library tkinter, the GUI has been built with the code of the LCS problem embedded within the GUI application. This would not only help to see how the strings are being matched inside the program but also the way the optimal solution is produced.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"32 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75394577","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}
This paper presents the use of modified method of constant voltage technique, electrical resistivity and corrosion potential measurements in determining the effectiveness of corrosion inhibitors’ in concrete in arresting corrosion in the steel rebars in reinforced concrete specimens. Accelerated corrosion test is conducted on the different corrosion inhibitor mixed reinforced beams made with different cover thickness to understand the effect of cover thickness and type of inhibitor on the rate of corrosion based on the accelerated cracking initiated. Various inhibitors of corrosion, including calcium nitrite, sodium nitrite, hexamine and Diethanolamine, have been used in optimal dosage and investigated for their corrosion resistivity in concrete.
{"title":"Assessment of efficiency of corrosion inhibitors in mitigating corrosion of rebars in concrete","authors":"V. Reddy, T. Prashanth, V. Reddy, S. Shrihari","doi":"10.1063/5.0057893","DOIUrl":"https://doi.org/10.1063/5.0057893","url":null,"abstract":"This paper presents the use of modified method of constant voltage technique, electrical resistivity and corrosion potential measurements in determining the effectiveness of corrosion inhibitors’ in concrete in arresting corrosion in the steel rebars in reinforced concrete specimens. Accelerated corrosion test is conducted on the different corrosion inhibitor mixed reinforced beams made with different cover thickness to understand the effect of cover thickness and type of inhibitor on the rate of corrosion based on the accelerated cracking initiated. Various inhibitors of corrosion, including calcium nitrite, sodium nitrite, hexamine and Diethanolamine, have been used in optimal dosage and investigated for their corrosion resistivity in concrete.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81403505","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}
{"title":"NIBS 2020 Timetable: Seventh International Symposium on Negative Ions, Beams and Sources","authors":"BelchenkoYuri, FairclothDan, LawrieScott, TarvainenOlli, WadaMotoi","doi":"10.1063/12.0005456","DOIUrl":"https://doi.org/10.1063/12.0005456","url":null,"abstract":"","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85726884","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}
In this article we have designed an efficient reconfigurable finite impulse response (RFIR) filter for the software defined radio applications. The proposed filter is designed with the sub modules as the adders and multipliers considering the hardware resource utilizations interms of throughput, latency, area, power consumption and delay. The useof parallel prefix adder (PPA) for partial products summation which are produced by multiplier. For faster multiplication, the distributed arithmetic (DA) look up table (LUT) based multiplier is used to multiply the x(n) and h(n) for performing the RFIR filter. The module is tested in both the platform MATLAB and Xilinx FPGA for random audio signal with and without noise. The Xilinx XPower analyzer shows 81mW onchip power required for the selected target Spartan 3E FPGA board.
在本文中，我们为软件无线电应用设计了一种高效的可重构有限脉冲响应(RFIR)滤波器。考虑到吞吐量、延迟、面积、功耗和延迟等硬件资源利用率，该滤波器采用子模块作为加法器和乘法器进行设计。并行前缀加法器(PPA)用于乘法器产生的部分乘积求和。为了更快地进行乘法，使用基于分布式算术(DA)查找表(LUT)的乘法器将x(n)和h(n)相乘，以执行RFIR滤波器。该模块在平台MATLAB和Xilinx FPGA上对随机音频信号进行了测试。Xilinx XPower分析仪显示所选目标Spartan 3E FPGA板所需的片上功率为81mW。
{"title":"Design and implementation of DA-RFIR filter for effective removal of noise from audio signal for SDR applications","authors":"G. Srikanth, Bhanu Murthy Bhaskara","doi":"10.1063/5.0058393","DOIUrl":"https://doi.org/10.1063/5.0058393","url":null,"abstract":"In this article we have designed an efficient reconfigurable finite impulse response (RFIR) filter for the software defined radio applications. The proposed filter is designed with the sub modules as the adders and multipliers considering the hardware resource utilizations interms of throughput, latency, area, power consumption and delay. The useof parallel prefix adder (PPA) for partial products summation which are produced by multiplier. For faster multiplication, the distributed arithmetic (DA) look up table (LUT) based multiplier is used to multiply the x(n) and h(n) for performing the RFIR filter. The module is tested in both the platform MATLAB and Xilinx FPGA for random audio signal with and without noise. The Xilinx XPower analyzer shows 81mW onchip power required for the selected target Spartan 3E FPGA board.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86308246","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}
Ion time-of-flight spectra from nanosecond pulse laser ablation at 1064 nm wavelength of a graphite target under repeated 10 Hz pulse repetition are investigated. By injecting focused laser beams at 12° from the surface normal, the ablated target formed a vertical cavity as the target is rotated continuously. For increasing number of pulses, decrease in positive signals for positive ion extraction while increase in negative signals for both 5 and 20 GW/cm2 laser power densities at −3 kV extraction voltage were observed. Increase in voltage onto a positive ion retardation plate installed in front of the Faraday cup array showed distinct negative ion peaks with decrease in positive ion signal intensity. Time-of- flight signals under increased number of pulses with the positively biased retardation plate showed less pronounced negative ion peaks for 5 GW/cm2 at -3 kV extraction, whereas the peaks persisted for 20 GW/cm2 laser power density. The influence of target cavity development on the negative ion formation is discussed.
{"title":"Ion time-of-flight signals from nanosecond laser ablation plasmas excited in constricted cavities","authors":"J. E. Hernandez, M. Wada","doi":"10.1063/5.0057437","DOIUrl":"https://doi.org/10.1063/5.0057437","url":null,"abstract":"Ion time-of-flight spectra from nanosecond pulse laser ablation at 1064 nm wavelength of a graphite target under repeated 10 Hz pulse repetition are investigated. By injecting focused laser beams at 12° from the surface normal, the ablated target formed a vertical cavity as the target is rotated continuously. For increasing number of pulses, decrease in positive signals for positive ion extraction while increase in negative signals for both 5 and 20 GW/cm2 laser power densities at −3 kV extraction voltage were observed. Increase in voltage onto a positive ion retardation plate installed in front of the Faraday cup array showed distinct negative ion peaks with decrease in positive ion signal intensity. Time-of- flight signals under increased number of pulses with the positively biased retardation plate showed less pronounced negative ion peaks for 5 GW/cm2 at -3 kV extraction, whereas the peaks persisted for 20 GW/cm2 laser power density. The influence of target cavity development on the negative ion formation is discussed.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84299224","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}
A. Heiler, R. Friedl, U. Fantz, R. Nocentini, M. Sasao
The development of ion sources for NNBI systems at future fusion devices like ITER or DEMO is based on the surface production of negative hydrogen ions. Thus, low work function converter surfaces are mandatory. Besides the state-of-the-art technique of continuous Cs injection during ion source operation, alternative materials are desirable to overcome the drawbacks of volatile Cs coatings. In this work, a C12A7 electride material is studied regarding the work function behavior in a hydrogen and deuterium plasma environment at ion source relevant conditions. The minimum measured work function obtained during the campaign is 2.9 ± 0.1 eV, with an optimization potential to lower values at better vacuum conditions and higher annealing temperatures. Biasing the sample during plasma operation exhibits a strong impact on the work function performance, which is dependent on the polarity and the applied bias potential. The minimum work function obtained for the C12A7 electride used in this experiment is substantially higher than what is achieved with in situ caesiation (~ 2 eV), but the sample has demonstrated promising properties in terms of plasma resilience.
{"title":"Work function behavior of a biased C12A7 electride in low temperature hydrogen plasmas","authors":"A. Heiler, R. Friedl, U. Fantz, R. Nocentini, M. Sasao","doi":"10.1063/5.0057482","DOIUrl":"https://doi.org/10.1063/5.0057482","url":null,"abstract":"The development of ion sources for NNBI systems at future fusion devices like ITER or DEMO is based on the surface production of negative hydrogen ions. Thus, low work function converter surfaces are mandatory. Besides the state-of-the-art technique of continuous Cs injection during ion source operation, alternative materials are desirable to overcome the drawbacks of volatile Cs coatings. In this work, a C12A7 electride material is studied regarding the work function behavior in a hydrogen and deuterium plasma environment at ion source relevant conditions. The minimum measured work function obtained during the campaign is 2.9 ± 0.1 eV, with an optimization potential to lower values at better vacuum conditions and higher annealing temperatures. Biasing the sample during plasma operation exhibits a strong impact on the work function performance, which is dependent on the polarity and the applied bias potential. The minimum work function obtained for the C12A7 electride used in this experiment is substantially higher than what is achieved with in situ caesiation (~ 2 eV), but the sample has demonstrated promising properties in terms of plasma resilience.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83774181","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}
Many of the manufacturing industries use sheet metal for optimizing the weight of the products. Forming process has been successively increasing during the past few decades. Indexing mechanisms have been used in milling, weaving, packing, etc. for continuous production purpose. Shearing of sheet metals has been widely used for optimizing the weight of the components and products. Crank slotter mechanism was widely used in the mechanisms for intermittent operations. This has been replaced by Geneva mechanism. The paper aims at deriving the mathematical relations for slotted Geneva wheel using curve theory. The kinematic characteristics are derived using the DH notations Finite element analysis has been done on the designed Geneva wheel with pin. It is analysed for the contact stresses when the drive crank pin slides along the slots of the wheel to operate the mechanism.
{"title":"Analysis on slot curvature and contact stresses on Geneva wheel","authors":"S. Bhaskar, K. P. Kumar, D. Kumar","doi":"10.1063/5.0058041","DOIUrl":"https://doi.org/10.1063/5.0058041","url":null,"abstract":"Many of the manufacturing industries use sheet metal for optimizing the weight of the products. Forming process has been successively increasing during the past few decades. Indexing mechanisms have been used in milling, weaving, packing, etc. for continuous production purpose. Shearing of sheet metals has been widely used for optimizing the weight of the components and products. Crank slotter mechanism was widely used in the mechanisms for intermittent operations. This has been replaced by Geneva mechanism. The paper aims at deriving the mathematical relations for slotted Geneva wheel using curve theory. The kinematic characteristics are derived using the DH notations Finite element analysis has been done on the designed Geneva wheel with pin. It is analysed for the contact stresses when the drive crank pin slides along the slots of the wheel to operate the mechanism.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73571264","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}
The research paper detail with the very important issue that how to provide Security to home which is under threat from the thief for burglary sometime person life will be in danger and now a day, the thief have become more advance in doing burglary not only home but bank shopping mall and gold & diamond jewellery and so to protect not only this building but also our houses, this research paper discuss about protection of building by using PIR sensor wich is a motion detector along with nodeMCU and mobile phone application which is called as Blynk we have to installed this application in our mobile phones this application will be active in phone and a screen will when a motion is detected by pir sensor
{"title":"IoT based surveillance system using with NODEMCU","authors":"P. P. Kumar, M. S. Khan, Prasad Janga, P. Kumar","doi":"10.1063/5.0058131","DOIUrl":"https://doi.org/10.1063/5.0058131","url":null,"abstract":"The research paper detail with the very important issue that how to provide Security to home which is under threat from the thief for burglary sometime person life will be in danger and now a day, the thief have become more advance in doing burglary not only home but bank shopping mall and gold & diamond jewellery and so to protect not only this building but also our houses, this research paper discuss about protection of building by using PIR sensor wich is a motion detector along with nodeMCU and mobile phone application which is called as Blynk we have to installed this application in our mobile phones this application will be active in phone and a screen will when a motion is detected by pir sensor","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87091011","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}
John Sebert Mampilli, C. S. S. Syam, K. P. A. Jith, A. Rajan, T. R. Rathish, Akash James
A revived interest in space exploration and the requirements of an actively developing commercial market have led to renewed research into the development of new rocket engines that are simpler to build; use and can operate in a wider range of conditions. One such recent development is the interest in methane (CH4) as a rocket fuel. A sub-scale rocket engine using gaseous methane and gaseous oxygen as propellants was designed, with a chamber pressure of 10 bar and mixture ratio of 3:1. A shear co-axial gas-gas fuel injector for the same engine was also designed. Numerical simulation of the performance of the complete engine was carried out. The simulation results shows that the nozzle exit Mach number and pressure close to the analytically calculated values of Mach 2.5 and 0.5 bar, and the mass fraction of methane being depleted within the combustion chamber, indicating complete combustion of the fuel. The design of the fuel injector was an area of particular focus, partly due to the absence of well-documented and validated design data and methodologies, especially for the fuels chosen.
{"title":"Design of methane/oxygen fuelled bipropellant rocket engine","authors":"John Sebert Mampilli, C. S. S. Syam, K. P. A. Jith, A. Rajan, T. R. Rathish, Akash James","doi":"10.1063/5.0058359","DOIUrl":"https://doi.org/10.1063/5.0058359","url":null,"abstract":"A revived interest in space exploration and the requirements of an actively developing commercial market have led to renewed research into the development of new rocket engines that are simpler to build; use and can operate in a wider range of conditions. One such recent development is the interest in methane (CH4) as a rocket fuel. A sub-scale rocket engine using gaseous methane and gaseous oxygen as propellants was designed, with a chamber pressure of 10 bar and mixture ratio of 3:1. A shear co-axial gas-gas fuel injector for the same engine was also designed. Numerical simulation of the performance of the complete engine was carried out. The simulation results shows that the nozzle exit Mach number and pressure close to the analytically calculated values of Mach 2.5 and 0.5 bar, and the mass fraction of methane being depleted within the combustion chamber, indicating complete combustion of the fuel. The design of the fuel injector was an area of particular focus, partly due to the absence of well-documented and validated design data and methodologies, especially for the fuels chosen.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75751121","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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