对一种潜入式可抛喷管进行强度分析和流场仿真,强度仿真结果揭示了燃气压强作用下可抛喷管的应力分布,流场仿真结果揭示了燃气经由可抛喷管排出时的流场特征,结果表明可抛喷管整体结构设计能够满足要求。研究中模拟了环形切割器工作对冲压喷管被剪切部位的作用和影响,对模拟仿真结果与环形切割器功能验证剪切试验结果进行了对比分析,认为壳体剪切部位须设计一定厚度的台阶。数值仿真结果有助于可抛喷管的结构优化设计。

A simulation analysis of structural strength and flow field for a disposable nozzle was carried out, which revealed stress distribution and character of flow field of the nozzle, and the results proved that the overall structure of the nozzle could meet the structural requirements. The working effect of annular cutter on the nozzle was simulated, and the results of numerical simulation and previous cutting tests were analyzed, suggesting necessity of a stair with certain thickness. The analysis results can provide references for structural optimization design of disposable nozzle.