一种高速低过载导弹弹射分离燃气做功装置设计研究

Design and Research on A High-Speed and Low Overload Missile Ejection Separation Gas Power Device

为满足某型号导弹弹射分离燃气做功系统低过载及高出筒速度的要求,基于两级燃气发生器分时序点火方式,设计了一种新型两级组合式弹射分离燃气做功装置,建立了弹射内弹道仿真模型,对其作用过程中高、低压室内部压强、负载速度及冲击过载进行仿真和试验研究,并与基于单燃气发生器的导弹弹射分离过程进行了对比。结果表明:所设计的两级组合式弹射分离燃气做功装置的负载出筒速度为19.4 m·s^(-1),最大过载为31.4 g,能够满足高出筒速度和低过载的指标要求;低压室最大压强、负载最大出筒速度和最大过载的仿真和试验误差分别为4.4%、-3.1%和2.5%,表明所建立的两级组合式燃气做功装置内弹道模型具有较高可靠性,能够有效指导同类型弹射内弹道设计和性能预测。

In order to meet the requirements of low overload and high separation speed for a certain type of missile ejection separation gas power system,a new two-stage combined ejection separation gas power device was designed based on the method of two-stage gas generator ignition in time sequence.A simulation model for the ejection internal ballistic was established,and the pressure inside the high and low pressure chambers,load speed and impact overload during its operation were simulated and experimentally studied,and compared with the missile ejection separation process based on a single gas generator.The results show that the designed two-stage combined ejection separation gas power device has a load discharge velocity of 19.4 m·s^(-1) and a maximum overload of 31.4 g,which can meet the requirements of high ejection velocity and low overload;The simulation and test errors of the maximum pressure in the low-pressure chamber,the maximum ejection velocity of the load,and the maximum overload are 4.4%,-3.1%,and 2.5%,respectively,indicating that the two-stage combined gas power device internal ballistic model has high reliability and can effectively guide the design and performance prediction of similar catapult internal ballistics.