Issue |
JNWPU
Volume 36, Number 6, December 2018
|
|
---|---|---|
Page(s) | 1193 - 1201 | |
DOI | https://doi.org/10.1051/jnwpu/20183661193 | |
Published online | 12 March 2019 |
Analyzing Influence of Ignition Gas Flow Pipe of Igniter on Working Process
点火通道对点火装置工作过程影响分析
1
School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
2
The Forth Research Academy, CASIC, Xiaogan 432100, China
Received:
23
November
2017
Based on gas dynamics and computational fluid dynamics, the numerical simulation of the steady-state flow field of igniter working in the two conditions was conducted with FLUENT. The numerical simulation results were validated by experiments. Influences of ignition gas flow pipe on the igniter's working performance were analyzed on the basis of test validation. The analysis results show that the combustion chamber pressure has atmospheric pressure and that the igniter works with ignition gas flow pipe. The velocity of throat is lower than the speed of sound and the sonic position moves to the position of ignition gas flow pipe; the velocity, pressure and temperature of throat increase; but the flux, pressure and temperature of outlet decrease. Under the different conditions of combustion chamber pressure, the outlet velocity, pressure, temperature and flux have a stable section; but the flux decreases.
摘要
基于气体动力学和计算流体力学的相关理论,采用FLUENT流场计算软件,对液体火箭发动机固体式点火装置在2种工况(Ⅰ为无点火通道、Ⅱ为经过点火通道)工作时的稳态流场进行了数值模拟,在此基础上分析了点火通道对液体火箭发动机固体式点火装置工作特性的影响。结果表明:在燃烧室压强为大气压时,点火装置在工况Ⅱ状态下,喉部燃气速度达不到声速,声速位置移到点火通道某一位置;出口处燃气速度、喉部处压强和温度相对于工况Ⅰ增加;燃气流量、出口处压强和温度相对于工况Ⅰ减小。在不同燃烧室压强时,两种工况下出口处速度、压强、温度和流量均有一个稳定段;工况Ⅱ的燃气流量小于工况Ⅰ。
Key words: computational fluid dynamics / ignition / combustion chambers / steady-state flow field / numerical simulation
关键字 : 流体力学 / 点火装置 / 燃烧室 / 稳态流场 / 数值模拟
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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