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利用CFX和ANSYS模拟了固体推进剂裂纹内点火阶段的流固耦合过程。流场边界添加源项模拟装药燃烧的质量添加,CFX计算得出的压强值和ANSYS计算得出的边界位移在2个软件之间传递,实现流固耦合仿真过程。仿真结果表明,裂纹内部燃气压强随时间先增大后减小,之后逐渐稳定;药柱最大应力随时间变化呈波动状态,最大变形量随时间持续增大;药柱裂纹的变形不能忽略;裂纹的变形作用降低了裂纹流场中的顶端压强峰值。
CFX and ANSYS were used to simulate the fluid-structure interaction in the ignition phase of the solid propellant. Flow field boundary Add source item to simulate the mass addition of combustion, the pressure value calculated by CFX and the boundary displacement calculated by ANSYS are transferred between two softwares to realize the fluid-solid coupling simulation process. The simulation results show that the gas pressure inside the crack first increases and then decreases with time, then gradually stabilizes; the maximum stress of the column fluctuates with time, and the maximum deformation increases with time; the crack of the grain can not be ignored; the crack The deformation reduces the tip pressure peak in the crack flow field.