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基于有限容积的思想，构造任意形状的三维药柱燃面退移通用计算方法，并推广应用于嵌金属丝推进剂的燃面计算。计算过程只关心燃面的始态和终态，可完全避开错综复杂的几何燃面变化规律，实现任意药型下多推进剂、变燃速燃面退移的计算机数值模拟。在此基础上，对三维组合药型单室双推力发动机进行了喉部烧蚀条件下的内弹道计算，同时与试验结果进行比较，取得了较好的效果。
Based on the idea of finite volume, a general calculation method of three-dimensional cylindrical surface burning off with arbitrary shape is constructed and applied to the calculation of the burning surface of embedded wire propellants. The calculation process is only concerned with the initial state and the final state of the combustion surface, which can completely avoid the complicated law of the geometric combustion surface and realize the numerical simulation of the multi-propellant and combustion-induced combustion surface retrogression under any drug type. On this basis, the internal trajectory calculation of the three-dimensional combined-medicine single-chamber double-thrust engine under laryngeal ablation was carried out, and compared with the experimental results, and achieved good results.