小推力液体火箭推进系统脉冲工况数值模拟

Numerical Simulation of Pulse Operation for Small Thrust Liquid Rocket Propulsion System

给出了液体火箭推进系统脉冲工作过程数值仿真模型;基于管道中一维流动力学方程的特征线解法,微分方程用差分解法,边界条件直接含在了模型中;对影响发动机多肪冲起动的主要参数进行了数值计算,计算结果与试验中发动机的工作参数具有较好的一致性;仿真软件和所得结果对小推车液体火箭推进系统设计具有重要参考价值.

The numerical simulation model is presented for pulse operation of liquid rocket propulsion system, which was based on a method of characteristics solution of the equations of motion for one dimensional fluid flow in pipelines. The differential equations were solved using a first order finite difference technique. Boundary conditions for the equations of motion were developed or directly included from available component models. The results are in agreement with the test process. The simulation software and the results are valuable for designers of liquid rocket propulsion system.