高温燃气与不同构型的再生冷却面板对流传热的数值模拟

对高温燃气与带有平行冷却通道的再生冷却面板之间的三维耦合传热开展了数值研究,其中冷却通道内冷却剂为超临界压力煤油,并结合理论分析探讨了冷却面板构型对耦合传热的影响。结果表明:随燃气侧壁厚以及冷却通道宽度和高度的增大,燃气侧壁面温度升高,热流密度降低。研究还发现:冷却通道不同壁面传递给煤油的热量占比几乎不随燃气侧壁厚变化,但随冷却通道宽度和高度的改变而变化。

Numerical simulation on convective heat transfer between high-temperature gas and regenerative cooling panels of different configurations

The three-dimensional coupled heat transfer between high-temperature gas, regenerative cooling panels with parallel cooling channels were numerically investigated, in which kerosene of supercritical pressure was used as the coolant. Combined with theoretical analysis, the influence of panel configuration was studied and discussed. Results indicate that the temperature of the gas heated surface rise with the thickness of gas side wall, the width and height of the cooling channels, while heat flux of the gas heated surface decreases with the increase of these parameters. It was found that the percentage of the heat absorbed by kerosene from the bottom walls, side walls and top walls of the cooling channels hardly changes with the thickness of gas side wall, while it changes with the variation of width and height of the cooling channels.