移动网格技术在求解固体火箭发动机侵蚀流场中的应用

The Technique of Dynamic Meshes Used in Numerical Simulations for Erosive Flow Field of Solid Rocket Motor

应用流体计算软件Fluent的动网格技术和网格自适应技术,通过UDF(用户自定义函数)编程,耦合了燃面加质,对某固体火箭发动机的侵蚀流场进行了轴对称数值模拟。文中除了将计算结果同实验结果进行对比外,还得出了固体火箭发动机侵蚀燃烧过程中装药燃面推移图像,并分析了侵蚀燃烧对发动机燃烧室压强的影响。

Based on the technique of dynamic meshes and grid adaption of calculation fluid software, an axisymmetric numerical simulation method which coupled mass-flow-inlet of the burning face through user defined function（ UDF） was carried out to analysis the erosive flow field of SRM. Except the computing results compared to the test results, the results also show images of the moving burning face of the SRM during the process of erosive burning can be obtained . The effects of erosive burning to the pressure of the SRM＇s chamber is also analyzed.