流体控制矢量喷管启动过程的瞬态响应

王猛杰; 额日其太; 王强

流体控制矢量喷管启动过程的瞬态响应

北京航空航天大学能源与动力学院,北京 100191

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出版历程
- 收稿日期: 2011-11-22
- 刊出日期: 2012-10-28

Transient response of startup process for fluidic control vector nozzle

School of Jet Propulsion,Beijing University of Aeronautics and Astronautics, Beijing 100191,China

摘要

摘要: 采用三维非定常数值模拟方法对流体矢量喷管启动的瞬态响应过程进行了研究,给出了流场的演化特性及性能参数的响应时间.根据不同时刻的流场和壁面压力分布,分析后得到了注气附近射流扰动波系及漩涡的演化过程,并与上壁面压力分布相互印证.由性能参数(包括流量,推力系数,矢量角)的时间响应曲线发现:流量和推力系数在响应初始阶段存在剧烈波动,而矢量角是平稳变化,三者的响应时间在毫秒量级.
- 流体推力矢量 /
- 喷管 /
- 瞬态响应 /
- 数值模拟 /
- 激波
Abstract: Three-dimensional unsteady numerical investigations of startup process of fluidic control vector nozzle were performed. The objective of this study was to gain the fluid field evolvement characteristic and response time of performance parameter. By analyzing fluid field and pressure distribution on up-wall at different time, the evolution of jet interaction wave systems and vortex, which were located at near field of injection exit, was presented. The flow structures were in accordance with pressure distribution. Through time response curves, mass and thrust coefficient showed drastically fluctuations while vector angle one varied almost monotonically. The response time of them was of milliseconds magnitude.
- fluidic thrust vector /
- nozzle /
- transient response /
- numerical simulations /
- shock wave

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参考文献(15)

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