将固体火箭发动机装药燃面视为运动界面,利用Level Set界面追踪方法追踪燃面变化过程,计算燃面肉厚曲线；空间、时间离散分别采用五阶高精度Weighted-ENO、三阶TVD Runge-Kutta格式；基于平行层推移规律,对某型号星孔装药进行燃面计算,对比Level Set方法与实体造型法计算结果,二者吻合较好；利用Level Set方法对装药含单条、两条相邻表面裂纹情况进行燃面计算.结果表明,Level Set方法对燃面交汇、分离、消失等复杂拓扑结构变化具有较强的处理能力,为含裂纹装药燃面计算提供了技术手段.%Regarding burning surface as moving interface, we use Level Set interface chasing method to capture the changing process of the burning surface and calculate its area in real time. Fifth-ordered Weighted-ENO and Third-ordered TVD Runge-Kutta schemes are employed respectively in space and time dispersion. Based on parallel burning algorithm, a certain star like grain is used as test case for both Level Set and Solid Modeling method, and the comparison shows that their results are almost equivalent. Moreover, a one-cracked grain and a two-near-cracked grains burning surface are analyzed by Level Set method. It is demonstrated that Level Set method is capable of dealing with complicated structure changes such as burning surface intersection, separation and vanishing, which provides a technical measure for burning area calculation of cracked propellant grain.
展开▼
