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利用水平集(Level-set)方法和最小距离函数(MDF)方法,对固体火箭发动机装药燃面退移问题进行研究。基于Level-set方法和MDF方法的相互耦合,建立了一种可以准确预测固体推进剂装药燃烧表面退移的方法;对不同几何药型、不同燃速组合推进剂装药及带侵蚀效应的装药进行计算分析,其结果表明,该组合方法及所采用的网格界面分割和几何重构计算燃面面积的思想,在预测固体推进剂装药燃面瞬态退移问题上具有良好的适应性和较高的可信度。
The level-set method and the minimum distance function (MDF) method are used to study the problem of the solid surface rocket engine detonation. Based on the mutual coupling between Level-set method and MDF method, a method of accurately predicting the surface migration of solid propellant charge combustion surface was established. For different geometric drug types, different burning rate propellant charge and erosion effect The results show that the combination method and the idea of grid interface segmentation and geometric reconstruction to calculate the area of the burned surface are good for predicting the instantaneous migration of solid propellant charge surface, Adaptability and high credibility.