| 脉动压力测量技术在火箭发动机试验中的应用 |
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| 引用本文： | 杨懿,于涛,郭亚男,贾志杰,王永鹏.脉动压力测量技术在火箭发动机试验中的应用[J].宇航学报,2021,42(7):917-926. |
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| 作者姓名： | 杨懿 于涛 郭亚男 贾志杰 王永鹏 |
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| 作者单位： | 北京航天试验技术研究所，北京 100074 |
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| 摘 要： | 为研究和探索火箭发动机地面试验推力室脉动压力测量方法和数据分析技术，介绍了火箭发动机试验中脉动压力测量系统的组成和参数的测量方法;分析了引压导管的动态特性及其对脉动压力参数测量的影响;采用齐平安装的方式，按照所述方法建立脉动压力参数测量系统;结合推力室多个振动测点的数据，分别采用快速傅里叶变换(FFT)和小波包分解两种方法对脉动压力数据进行分析。根据两种方法的分析结果推断发动机在径向和切向产生了不稳定燃烧。对探索和推广脉动压力测量技术在火箭发动机试验和其他组合件试验中的应用具有重要意义。
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| 关 键 词： | 火箭发动机 脉动压力 引压导管 FFT 小波包分解 |
| 收稿时间： | 2020-05-19 |
Application of Fluctuating Pressure Measurement Technology in Rocket Engine Test |
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| YANG Yi,YU Tao,GUO Ya nan,JIA Zhi jie,WANG Yong peng.Application of Fluctuating Pressure Measurement Technology in Rocket Engine Test[J].Journal of Astronautics,2021,42(7):917-926. |
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| Authors: | YANG Yi YU Tao GUO Ya nan JIA Zhi jie WANG Yong peng |
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| Affiliation: | Beijing Institute of Aerospace Testing Technology, Beijing 100074, China |
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| Abstract: | In order to study and explore the measurement method and data analysis technology of pulsating pressure in the thrust chamber of rocket engine ground test, the composition of pulsating pressure measurement system and the measurement method of parameters in rocket engine test are introduced. The dynamic characteristics of the transmission tube and its influence on the measurement of pulsating pressure parameters are analyzed. The measurement system of fluctuating pressure parameters is established by means of flush installation. Combined with the data of several vibration measurement points in the thrust chamber, two methods of fast Fourier transform (FFT) and wavelet packet decomposition are used to analyze the fluctuating pressure data. According to the analysis results of the two methods, it is inferred that the engine has unstable combustion both in radial and tangential directions. It is of great significance to explore and popularize the application of pulsating pressure measurement technology in rocket engine test and other assembly test. |
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| Keywords: | Rocket engine Fluctuating pressure Transmission tube Fourier transform Wavelet packet decomposition |
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