为了对复杂三维双燃速装药固体火箭发动机工作过程进行深入研究,基于FLUENT软件的UDF模块,进行了三维双燃速装药固体火箭发动机工作过程的数值计算,并与实验结果进行了对比,结果表明:星型段的点火相对圆管段存在一定点火滞后;采用纯六面体结构网格结合弹性光顺法、动态分层法及局部网格重构法可以实现近似的三维双燃速装药燃面推移过程计算,但仍需在非结构网格结合局部重构法方面进行深入研究;总的来说,仿真结果与实验结果符合较好。

In order to study work process of three-dimensional dual-burning rate grain solid rocket motor, simulation was made based on UDF of FLUENT and compared with the results of experiment. The results show that there is a lag in the tube section in the flame propagation of ignition, comparing with the star section of the grain. We can carry out the shift of three-dimension dual-burning rate grain by integrating structured mesh with smoothing methods, dynamic layering and local emeshing approximately. However, a further investigation should be holding in the area of unstructured mesh and local emeshing. As a whole, the calculated results compare favorably with experimental data.