推进技术 ›› 2013, Vol. 34 ›› Issue (3): 362-367.

• 燃烧传热传质 • 上一篇    下一篇

基于火焰面模型的推力室起动过程仿真

初敏1,徐旭1,许晓勇2   

  1. 北京航空航天大学 宇航学院,北京 100191;北京航空航天大学 宇航学院,北京 100191;北京航天动力研究所,北京100076
  • 发布日期:2021-08-15
  • 作者简介:初敏(1985—),男,博士生,研究领域为航空宇航推进理论与工程。 E-mail:chumin@sa.buaa.edu.cn

Numerical Simulation on Start-up Process in Thrust Chamber Based on Flamelet Model

  1. School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;Beijing Aerospace Propulsion Institute, Beijing 100076, China
  • Published:2021-08-15

摘要: 采用计算流体力学的方法,对氢氧火箭发动机推力室的起动过程进行了数值仿真。起动的非定常过程由双时间步方法模拟,燃烧过程由稳态层流火焰面模型模拟,火焰面建库采用6组分8步反应的化学动力学模型。按照地面试车时序进行推力室起动过程仿真,获得了起动过程的建压曲线以及详细的流场建立过程。结果表明,经过点火瞬间压力松弛控制的稳态层流火焰面模型可用于火箭发动机的点火过程动态仿真,仿真得到的压力曲线与试车曲线相比符合良好。 

关键词: 火箭发动机;起动过程;火焰面模型;数值仿真 

Abstract: Numerical simulation on start-up process in thrust chamber of hydrogen-oxygen rocket engine was performed by computational fluid dynamics method. Dual-time-step method and steady laminar flamelet model were utilized to simulate the unsteady process and combustion process, respectively. The database of flamelet model was set up by 8steps with 6specices chemical reaction model. The pressure curve and the detailed parameters of flowfield were achieved from the simulation, which was performed according to the time sequence of start-up process. It turns out that, the steady laminar flamelet model is available to the start-up process and the pressure curve shows good consistency with the test curve. 

Key words: Rocket engine; Start-up process; Flamelet model; Numerical simulation