固体火箭技术2025，Vol.48Issue(2)：216-224,9.DOI:10.7673/j.issn.1006-2793.2025.02.006
推力可调喉栓式固体火箭发动机瞬态特性研究
Transient characteristics of pintle variable thrust solid rocket motor
李耿 1武婷文 1王周成 1李鑫 1杨文婷1
作者信息
- 1. 西安航天动力技术研究所,西安 710025
- 折叠
摘要
Abstract
In order to understand the transient characteristics of pintle variable thrust solid rocket motor(pintle SRM),a transi-ent numerical calculation model was established based on the dynamic grid method,and User Defined Functions(UDF)program was written to simulate the movement law of the pintle and the mass flow rate at the inlet.The effects of the pintle adjusting process on the transient characteristics of the pintle SRM were studied.The results show that the dynamic response process of the chamber pressure and thrust of the pintle SRM is closely related to the pintle working state,pintle moving speed and pintle moving stroke.There is a large gap between the transient value achieved by the reciprocating movement of the pintle and the steady-state value achieved by the one-way movement,and change of thrust has a significant negative adjustment characteristic.In the one-way movement,the response time of the chamber pressure and thrust when the initial state of the pintle is closed is less than 1/10 of when the initial state is open.The moving speed of the pintle will affect the adjustment process and response time of the chamber pressure and thrust,and the adjustment ratio of thrust is consistent after reaching the steady state.With the increase of pintle stroke,the response time of the pintle SRM to reach the stable state also increases,and the thrust negative adjustment can be observed when the throat stroke is larger.关键词
喉栓/固体火箭发动机/瞬态仿真/动态响应/推力负调Key words
pintle/solid rocket motor/transient simulation/dynamic response/thrust negative adjustment分类
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李耿,武婷文,王周成,李鑫,杨文婷..推力可调喉栓式固体火箭发动机瞬态特性研究[J].固体火箭技术,2025,48(2):216-224,9.
