固-膏体燃气发生器热结构分析和仿真

固-膏体燃气发生器是一种新型的燃气发生系统，是潜地导弹变深度弹射系统中的核心部件。为了研究固-膏体燃气发生器工作后膏体储存室的温度分布情况，采用源项法结合动网格技术、RNG k-ε湍流模型和离散坐标（DO）辐射模型对固-膏体燃气发生器的工作过程进行了数值仿真，并对不同膏体推进剂挤压流量下的膏体推进剂的温度分布作了对比研究。结果表明，传入膏体储存室的热量大部分来自于挤压室内的高温燃气，且整体热量的传导主要在轴向进行。随着膏体推进剂挤压流量增加，膏体储存室内的最高温度和平均温度均有所增加。研究结果可以为该型号固-膏体燃气发生器的热防护设计和改进提供相关参考。

Thermal structure analysis and simulation of solid-gelled propellant gas generator

Solid-gelled propellant gas generator is a new and special gas generator, and is the core component of the variable-depth missile ejection system. In order to study the temperature distribution of storage space of solid-gelled propellant gas generator, the source term method, the dynamic mesh method, the RNG k-ε turbulent model and the discrete ordinates (DO) radiation model were used to numerically simulate the working process of the solid-gelled propellant gas generator. And temperature distributions under different flow rates of gelled propellant were studied and compared. The results show that most of heat that the gelled propellant obtained comes from the high-temperature gas in the extrusion chamber, and the main heat transfer happens in the axial direction. As the extrusion flow rate of gelled propellant increases, the highest and average temperatures of the gelled propellant storage space increase. The results of this study can provide a reference for the thermal protective design and improvement of this type of solid-gelled propellant gas generator.