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论文:2013,Vol:31,Issue(3):440-445 |
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引用本文： |
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靳乐, 范玮, 王玮, 陈巍. 喷管形式和环境压力对PDRE比冲的影响研究[J]. 西北工业大学 |
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Jin Le, Fan Wei, Wang Wei, Chen Wei. Exploring Numerically Influence of Nozzles and Ambient Pressure on Specific Impulse of Pulse Detonation Rocket Engine (PDRE)[J]. Northwestern polytechnical university |
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| 喷管形式和环境压力对PDRE比冲的影响研究 |
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| 靳乐, 范玮, 王玮, 陈巍 |
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| 西北工业大学 动力与能源学院, 陕西 西安 710072 |
| 摘要: |
| 采用数值模拟和实验的方法研究不同喷管形式(收敛型,扩张型和收敛扩张型)和环境压力对火箭式脉冲爆震发动机(PDRE)比冲的影响。数值模拟中采用有限速率化学反应模型,通过二阶迎风格式差分逼近二维欧拉方程,数值计算结果表明收敛型喷管对比冲的增益最大(17.20%),环境压力为0.5 atm时比冲最大。不同喷管形式的实验中利用推力传感器测量得到比冲,结果同样表明收敛喷管的比冲增益最大(18.67%),且数值模拟和实验的结果基本吻合。分别采用理想性能模型和热力循环模型研究环境压力对PDRE比冲的影响。结果表明,在环境压力小于1 atm时,两种模型的分析和数值模拟均呈现不同的结果,因此低压环境下发动机的比冲影响规律有待进一步实验验证。 |
| 关键词:
脉冲爆震火箭发动机
喷管
比冲
环境压力
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| Exploring Numerically Influence of Nozzles and Ambient Pressure on Specific Impulse of Pulse Detonation Rocket Engine (PDRE) |
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| Jin Le, Fan Wei, Wang Wei, Chen Wei |
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| Department of Aero-Engines,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| The Numerical method was utilized to simulate the working performance of the PDRE.Specific impulse of the PDRE with different nozzles (convergent, divergent, convergent-divergent) was studied.It was found that PDRE with convergent nozzle could obtain the highest specific impulse, which was 17.20% higher than the cases without any nozzle.Ambient pressure was reduced to simulate the operation of the PDRE under vacuum condition. The results and their analysis show preliminarily that the low ambient pressure is beneficial for improving the work-ing performance of PDRE, and 0.5atm is considered to be the optimum ambient pressure. |
| Key words:
computational fluid dynamics
computer software
experiments
impulse response
nozzles
numerical methods
optimization
pressure
pulse detonation engines
ambient pressure
pulse detonation rocket engine (PDRE)
specific impulse
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| 收稿日期: 2012-03-22
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(51176158);2011年西北工业大学本科毕业设计(论文)重点扶持项目;西北工业大学博士论文创新基金(CX201314)资助 |
| 通讯作者:
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| 作者简介: 靳乐(1987-),西北工业大学博士研究生,主要从事脉冲爆震发动机与燃烧学的研究。
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| 作者相关文章 |
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| 靳乐 在本刊中的所有文章 |
| 范玮 在本刊中的所有文章 |
| 王玮 在本刊中的所有文章 |
| 陈巍 在本刊中的所有文章 |
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参考文献: |
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[3] Guzik S M and Harris P G.An Investigation of Pulse Detonation Engine Configurations Using the Method of Characteristics.AIAA-2002-4066
[4] Yungster S.Analysis of Nozzle Effects on Pulse Detonation Engine Performance.AIAA-2003-1316
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[6] Wintenberger E, Austin J M, Cooper M, et al.An Analytical Model for the Impulse of Singe-Cycle Pulse Detonation Engine.Journal of Propulsion and Power, 2003, 19(1): 22-38
[7] 李 强.脉冲爆震发动机模型实验研究及工作过程仿真: [博士学位论文].西安: 西北工业大学, 2007 Li Qiang.Experimental and Numerical Simulation of Pulse Detonation Rocket Engine.Ph.D.Thesis, Xi'an, Northwestern Polytechnical University, 2007 (in Chinese) |
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