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所谓装药计算就是求出发动机内弹道计算所需要的装药几何参数。 现代的固体火箭发动机装填系数都很大,因而侵蚀燃烧现象比较严重。为了更准确地计算发动机的内弹道参数,必须考虑由于侵蚀燃烧而引起的装药截面积的变化。考虑这一因素的内弹道计算方法一般是将药柱沿轴线分段计算,这样就需要对装药每一节点处各个时刻的装药几何参数进行计算。装药计算量是相当大的,需要编制计算机程序来配合相应的内弹道计算。目前,国内大多数程序都是针对某一种特定药型的,这使得该程序的使用受到限制。所以有必要对目前国内固体火箭发动机中大量使用的装药进行研究,编制出通用的计算机程序。
The so-called charge calculation is to calculate the geometric parameters of the charge required to calculate the ballistic trajectory in the engine. Modern solid rocket engine filling factor is very large, so the phenomenon of erosion and combustion more serious. In order to more accurately calculate the internal ballistic parameters of the engine, it is necessary to consider the variation of charge cross-sectional area due to the erosion combustion. The internal ballistic calculation that takes this factor into account generally calculates the grain along the axis so that it is necessary to calculate the charge geometry at each point of the charge at each node. The computational load is quite large and requires the preparation of a computer program to work with the corresponding internal ballistic calculations. At present, most of the programs in the country are for a specific type of medicine, which limits the use of the program. Therefore, it is necessary to study the current large-scale use of solid propellant rocket engine in charge and to prepare a general computer program.