| 双脉冲固体火箭发动机压强振荡特性研究 |
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| 引用本文： | 刘伟凯,何国强,王春光. 双脉冲固体火箭发动机压强振荡特性研究[J]. 航空动力学报, 2015, 30(10): 2553-2560. DOI: 10.13224/j.cnki.jasp.2015.10.031 |
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| 作者姓名： | 刘伟凯 何国强 王春光 |
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| 作者单位： | 1. 西北工业大学 航天学院 燃烧、热结构与内流场重点实验室, 西安 710072; |
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| 摘 要： | 为了研究隔舱消融对双脉冲发动机中燃烧室的压强振荡影响规律,选择隔舱消融几个典型时刻进行研究,运用大涡模拟(LES)方法,对Ⅱ脉冲工作时的发动机流场稳定性进行数值模拟.最后得到了各工况下的压强时间曲线及其快速傅氏变换(FFT)结果.分析表明:由于Ⅱ脉冲工作初期隔舱暴露在流场中产生额外扰动,以及隔舱级间通道形成狭窄通道的加速作用,是导致边界层分离而引起障碍涡脱落的主要因素.点火初期,双脉冲发动机易发生轻微压强振荡.随隔舱消融,整个流场在发动机工作中、后期逐渐趋于平稳.
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| 关 键 词： | 双脉冲发动机 隔舱 压强振荡 突收突扩 大涡模拟 |
| 收稿时间： | 2014-04-13 |
Research on the pressure oscillation characteristics ofdouble pulse solid rocket motor |
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| LIU Wei-kai,HE Guo-qiang and WANG Chun-guang. Research on the pressure oscillation characteristics ofdouble pulse solid rocket motor[J]. Journal of Aerospace Power, 2015, 30(10): 2553-2560. DOI: 10.13224/j.cnki.jasp.2015.10.031 |
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| Authors: | LIU Wei-kai HE Guo-qiang WANG Chun-guang |
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| Affiliation: | 1. Science and Technology on Combustion, Internal Flow and Thermal-Structure Laboratory, School of Astronautics, Northwestern Polytechnical University, Xi'an 710072;2. Xi'an Aerospace Propulsion Institute, Academy of Aerospace Solid Propulsion Technology, China Aerospace Science and Technology Corporation, Xi'an 710025, China |
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| Abstract: | In order to reveal the relationship between the melting of pulse separation device (PSD) and the pressure oscillation, several melting moments were selected for research. Large eddy simulation (LES) was carried out for the numerical simulation of II pulse flow field, and the pressure-time curve and fast Fourier transformation (FFT) results were obtained successfully.The analysis results show that the additional disturbance in the flow field generated by opening PSD when the Ⅱ pulse is working, and the acceleration of interstage narrow channel, are the main factors to obstacle vortex shedding caused by boundary layer separation. In the early ignition, the double pulse motor (DPM)is prone to slight pressure oscillation. With the PSD melting, the whole flow field becomes more and more stabilized. |
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| Keywords: | double pulse motor pulse separation device pressure oscillation sudden closing and sudden expansion large eddy simulation |
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