针栓式喷嘴喷雾燃烧特性研究进展

Research Progress on Spray Combustion Characteristics of Pintle Injector

关键词:  液体火箭发动机  针栓式喷嘴  节流  雾化  燃烧  变推力

Key words:  Liquid rocket engine  Pintle injector  Throttling  Atomization  Combustion  Variable thrust

摘要:

针栓式喷嘴具有深度节流、结构简单、燃烧稳定等优点，主要用于变推力液体火箭发动机。本文介绍针栓式喷嘴的工作原理和发展历程，总结针栓式喷嘴的雾化特性和燃烧特性，展望针栓式喷嘴未来的研究方向。目前针栓式喷嘴的雾化特性研究较多，重点分析的是工况参数和结构尺寸对破碎形态、喷雾锥角、SMD、液滴速度等的影响，针对针栓式喷嘴液膜破碎机理的研究相对较少；针栓式喷嘴燃烧特性研究主要集中于燃烧流场结构、燃烧性能和热防护等方面，对针栓式发动机固有燃烧稳定性机理以及动态燃烧特性的研究还较为欠缺。

Abstract:

The pintle injector has the advantages of deep throttling， simple structure and stable combustion， etc. It is mainly used in variable thrust liquid rocket engine. In this review， the working principle and development history of the pintle injector are introduced firstly， then the atomization and combustion characteristics of the pintle injector are summarized， and finally the future research direction of the pintle injector is prospected. At present， there are many studies on the atomization characteristics of the pintle injector， focusing on the analysis of the effects of working conditions and structure size on the crushing morphology， spray cone angle， SMD and droplet velocity， etc.， but the research on the liquid film breaking mechanism of the pintle injector is relatively few. The research on the combustion characteristics of the pintle injector mainly focuses on the structure of combustion flow field， combustion performance and thermal protection， etc. However， the research on the mechanism of the inherent combustion stability and dynamic combustion characteristics of the pintle injector engine is still relatively lacking.