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本文以复合固体推进剂稳态燃烧的多火焰模型为基础,湍流反应边界层理论为指导,推导了一种复合固体推进剂侵蚀燃烧理论模型。本模型不仅能反映气流速度、压力等对侵蚀燃烧的作用机理,而且能反映氧化剂粒度对侵蚀燃烧的作用机理。利用本模型推导出了包含氧化剂粒度作用因子的计算基本燃速和侵蚀燃速的关系式。利用本模型对含不同氧化剂粒度的三种丁羟复合推进剂进行的理论预示与实验数据吻合较好。
Based on the multi-flame model of steady-state combustion of composite solid propellants and the theory of turbulent boundary layer, a theoretical model of erosion and combustion of composite solid propellant was derived. The model can not only reflect the action mechanism of gas flow velocity and pressure on erosion and combustion, but also reflect the action mechanism of oxidant particle size on erosion and combustion. Based on this model, the relationship between the calculated basic combustion rate and the eroded combustion rate is derived. The theoretical predictions of the three kinds of compound propellants with different oxidant particle sizes are in good agreement with the experimental data by using this model.