Simulation Analysis of Output Performance of Y-type Three-way Structure of Double Powder Igniter
The work aims to study the output performance of Y-type three-way structure of gas generator double powder ig-niter under different working conditions.In this paper,based on the classical interior ballistic theory,an interior ballistic simula-tion model of a Y-shaped three-way structure of a dual-propellant igniter was established.The Simulink module of MATLAB software was used to solve the interior ballistic simulation model.The gas pressure change law with time at the output port un-der 6 typical working conditions(The single powder igniter worked normally at low temperature;The double powder igniter worked normally at low temperature;The difference between the two igniters was 30msat low temperature.One of the double igniters failed at low temperature;The single powder igniter worked normally at high temperature;Double powder igniter worked normally at high temperature)was compared and analyzed.The stable combustion impulse and the peak pressure under these 6 working conditions were quantitatively compared and analyzed.The stable combustion impulse of the double powder igniter was about 1.7 times that of the single powder igniter,which was beneficial to the reliable ignition of the liquid hydrogen liquid oxygen mixture in the gas generator.When the dual-powder igniter was ignited at a difference of 30ms,its output per-formance was not much different from that of the double powder igniter when it worked normally,that was,the double powder igniter had better synchronization.When one igniter of the double powder igniter failed,the stable combustion impulse of the Y-type three-way structure was equivalent to that of the single powder igniter.Under high temperature conditions,the peak pressure in the Y-type tee structure of the double powder igniter was 11.99 MPa when it worked normally,which did not exceed the strength range of the Y-type tee tube,and had a large margin space,which ensured the reliability of the Y-type tee structure of the double igniter.The simulation results of this paper can provide reference for the optimization design of Y-type tee struc-ture of Y gas generator double powder igniter.
NETL
NSTL
万方数据
