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点火发动机点火喷流沿药柱通道传播过程是一个非常典型的非稳态流固耦合问题。采用流固耦合模拟方法对点火瞬态药柱通道内的流场以及在流场作用下药柱的结构完整性进行流固耦合分析,确定药柱通道各点压力上升产生的原因以及该过程中装药的应力应变情况。仿真结果表明在点火喷流沿药柱通道传播过程中,将出现超压较大的激波结构,造成装药通道内不同位置处出现程度不同的压力振荡;在激波向尾部传播阶段,药柱的应力传播落后于激波传播;在激波的反射阶段,药柱最大应力位于尾部翼槽底部区域。
Ignition engine ignition jet flow propagation along the channel is a very typical non-steady-state fluid-structure coupling problem. The fluid-solid coupling simulation method is used to analyze the flow field in the transient transient channel and the structural integrity of the column under the action of flow field, and to determine the causes of the pressure rise at each point of the column channel and the process of loading Stress and strain of medicine. The simulation results show that during the propagation of the ignition jet along the grain passage, a large overpressure shock structure will occur, resulting in different pressure oscillations at different positions in the charge passage. During the shock wave propagation to the tail, The stress propagation of the column lags behind that of the shock wave. In the reflection phase of the shock wave, the maximum stress of the column lies in the bottom area of the tail wing groove.