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论文:2013,Vol:31,Issue(6):935-939 |
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引用本文： |
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李晓丰, 郑龙席, 邱华. 脉冲爆震涡轮发动机气动阀特性数值模拟研究[J]. 西北工业大学 |
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Li Xiaofeng, Zheng Longxi, Qiu Hua. Numerical Simulation Study on Pneumatic Valve Pulse Detonation Turbine Engine[J]. Northwestern polytechnical university |
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| 脉冲爆震涡轮发动机气动阀特性数值模拟研究 |
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| 李晓丰, 郑龙席, 邱华 |
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| 西北工业大学 动力与能源学院, 陕西 西安 710072 |
| 摘要: |
| 为减小脉冲爆震燃烧室爆震波压力前传,确保爆震室与压气机匹配成功,在爆震室头部设计了气动阀,并建立其数值有限元模型,研究气动阀对爆震前传压力波的详细作用和气动阀关闭时间对前传压力波衰减特性的影响。结果表明:爆震前传压力波透过气动阀在上游所形成的压缩波会扰乱气流,导致压缩波和膨胀波在压气机和气动阀之间来回震荡,不利于发动机爆震室填充;所设计的气动阀对爆震前传压力波具有很好的抑制作用,压力峰值衰减达72.9%,而无阀时压力峰值衰减仅为47.3%;气动阀对前传压力波的衰减效果随阀体关闭时间的缩短而提高,但当阀体关闭时间缩短到0ms时,其衰减效果突然下降,为69.819%。 |
| 关键词:
脉冲爆震发动机
气动阀
计算机仿真
有限元模型
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| Numerical Simulation Study on Pneumatic Valve Pulse Detonation Turbine Engine |
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| Li Xiaofeng, Zheng Longxi, Qiu Hua |
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| Department of Aero-Engines, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| In order to reduce the amplitude of pulse detonation wave passing back and to make sure that the match is successful between the pulse detonation combustor and the compressor, a pneumatic valve was designed at the head of the pulse detonation combustor.The numerical finite element model of the pneumatic valve was established;on this model the detailed mechanism and attenuation characteristics of the pneumatic valve on the passing -back wave were studied.The results and their analysis show preliminarily that:the passing-back wave disrupts the airflow upstream of the pneumatic valve;this disruption causes compression waves and expansion waves back and forth be-tween the compressor and the pneumatic valve, so it is not conducive to the filling up of pulse detonation combus-tor;under the effect of the valve the pressure peak attenuation is 72.9%, while it reduces to 47.3%with no valve;these percentages indicate that the pneumatic valve has good inhibition effect on the passing -back wave;the attenu-ating effect is increased with the shortening of the valve closing time, but when the valve closing time shortens to 0ms, the attenuation effect suddenly drops to 69.819%. |
| Key words:
pulse detonation engines
pneumatic valve
computer simulation
finite element method
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| 收稿日期: 2013-03-12
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(50906072)资助 |
| 通讯作者:
Email： |
| 作者简介: 李晓丰(1985-),西北工业大学博士研究生,主要从事新概念推进技术、燃烧与流动的研究。
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| 相关功能 |
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| 作者相关文章 |
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| 李晓丰 在本刊中的所有文章 |
| 郑龙席 在本刊中的所有文章 |
| 邱华 在本刊中的所有文章 |
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参考文献: |
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