火药启动器壳体瞬态温度场的数值模拟分析

Numerical Simulation Study on Transient Temperature Field in Cartridge Starter Shell

通过对某型号火箭发动机的火药启动器单独工作时壳体的瞬态温度场进行计算和分析,研究了燃气热效应对电爆管电缆插头非金属部分的影响;通过使用Fluent软件对发动机火药启动器工作期间壳体瞬态温度场进行数值模拟,同时对圆柱段进行一维传热计算,得到火药启动器工作1 s后的内外壁面温度分布,并与实验数据进行对比分析。结果表明,使用Fluent软件数值模拟和一维传热计算得到的火药启动器工作后的壁面温度相近,且与实验测量数据相差不大,火药启动器单独工作的热效应对电爆管电缆插头非金属部分没有影响。

To study the effect of hot gas on the nonmetal part of electric initiator cable plug, a numerical study on transient temperature field in the cartridge starter shell is performed. The hot gas is produced by the cartridge starter which is fixed on a liquid propellant rocket engine. A numerical simulation of transient temperature field is carried out by using Fluent software. Besides, one-dimensional calculation for the column part of the shell is taken out. Both of the results are compared with the experiment data. The results are listed in this paper. Results indicate that numerical simulation and one-dimensional heat transfer calculation of the temperature field consistent with each other. They also make few differences between experiment data. That means the cartridge starter＇s hot gas would not affect the nonmetal part in the electric initiator cable plug