四机并联全辐射冷却推力室的传热分析

分析了四机并联全辐射冷却推力室的热特点．忽略径向导热，考虑推力室外向的相互及自身辐射交换、内壁经喷口的辐射泄漏以及周向和轴向的传导热量，建立了推力室壁的能量方程．计算表明，推力室之间的辐射传热引起的周向温度畸变，主要取决于推力室间的相对间距Ｌ／Ｄ，而与原壁温水平无关．对仅有两对角推力室工作、另一对推力室不工作时的温度分布特点也作了分析．经地面模拟和实验验证，数值分析结果是正确的．

Analysis of Heat Transfer for Thrust Chambers of Parallel Four Engines by All-Radiation Cooling

Heat transfer in four parallel connecting thrust chambers with radiation cooling was analyzed. The energy equation of the thrust chamber wall was developed by omitting radical heat conduction and only considering the radiation heat transfer of the four chambers, the radiation leakage through nozzle exit, the axial and circular heat conduction. The result proves that the circular temperature change caused by the radiation between the chambers is mostly decided by the dimensionless distance L/D and is foreign to the original wall temperature. Also, the analysis of the system with only one pair of operating thrust chambers was performed. The simulation test on the ground validates the numerical analysis.