航天推进技术研究院主办
[1]何志勇,张志峰,宋少伟.瞬变流速作用下姿控发动机燃料管路的非线性振动特性分析[J].火箭推进,2021,47(01):55-61.
HE Zhiyong,ZHANG Zhifeng,SONG Shaowei.Effect of transient for velocity on nonlinear vibration characteristics of fuel pipe in attitude control engine[J].Journal of Rocket Propulsion,2021,47(01):55-61.
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HE Zhiyong,ZHANG Zhifeng,SONG Shaowei.Effect of transient for velocity on nonlinear vibration characteristics of fuel pipe in attitude control engine[J].Journal of Rocket Propulsion,2021,47(01):55-61.
瞬变流速作用下姿控发动机燃料管路的非线性振动特性分析
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
47
期数:
2021年01期
页码:
55-61
栏目:
研究与设计
出版日期:
2021-02-28
- Title:
- Effect of transient for velocity on nonlinear vibration characteristics of fuel pipe in attitude control engine
- 文章编号:
- 1672-9374(2021)01-0055-07
- 分类号:
- V434.23
- 文献标志码:
- A
- 摘要:
- 为研究瞬变流速激励下某型卫星姿控发动机燃料输送管路的非线性振动特性,采用加权余量法和四阶Runge—Kutta法对燃料输送管路的非线性液固耦合振动模型进行了数值仿真,研究不同燃料流速下、电磁阀开关时长对燃料管路非线性振动稳定性的影响。仿真结果表明,依据管路特征线可将管路振动分为稳定振动区和不稳定振动区,且不稳定振动主要表现为发散失稳和扩张失稳。当电磁阀开关时长处于失稳区时,电磁阀门开启时长引起的燃料管路不稳定振动为多频率、变幅值的动态扩张失稳,且燃油流速增大是影响管路振动扩张断裂的主要因素; 电磁阀门关闭时长引起的燃料管路不稳定振动为单频、变幅值扩张失稳。
- Abstract:
- In order to investigate the effect of transient flow velocity on nonlinear vibration characteristics of fuel pipeline in attitude control engine, a nonlinear liquid-solid coupling model of fuel pipe was developed and simulated by use of the weighted residuals method and the fourth-order Runge-Kutta method. The effect of the opening and closing time of the solenoid valve on the nonlinear vibration of fuel pipe was studied under different transient fuel flow rates. The results show that the pipeline vibration can be divided into stable vibration zone and unstable vibration zone according to the pipeline characteristic curve, and the unstable vibration is mainly manifested as divergent instability and distensibility instability. When the opening/closing time of solenoid valve locates in the instability region, the multi-frequency and variable amplitude expansion vibration of fuel pipeline will be induced by the transient flow velocity of fuel because of the sudden opening of the solenoid valve and the increased flow velocity of fuel is one of the mainfactor that results in the cracks of fuel pipeline. However, the single-frequency and variable amplitude expansion vibration of fuel pipeline is caused by the unstable vibration of the fuel pipeline due to the sudden closing of the solenoid valve.
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备注/Memo
收稿日期:2019-11-08
基金项目:国家自然科学基金(11702205)
作者简介:何志勇(1978—),男,硕士,研究领域为液体火箭发动机振动信号处理与分析。
更新日期/Last Update:
2021-02-20