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本文对等腰三角形通道内气体的流动与换热问题进行了实验研究和数值分析计算,测量了顶角为30°和60°角的四种通道的气体速度,温度和壁温分布,获得了三角形通道的阻力系数和换热系数,研究了边壁厚度和强化换热粗糙元对换热的影响.为了把有限的实验资料推广到其它三角形通道,对任意顶角的等腰三角通道内的湍流换热问题作了数值计算,计算中考虑了边壁导热影响和壁面粗糙元影响,计算结果和实验结果吻合良好. 三角形通道在航空发动机叶片的冷却,化工设备和换热器的生产设计中都有很重要的应用。在文献报告中有关三角通道对流换热的研究主要是对小顶角等腰三角通道和等边三角形两种情况而做的,因此对三角形通道对流换热问题作进一步的研究是很有意义的.
In this paper, the gas flow and heat transfer problems in the isosceles triangle channel are experimentally studied and calculated numerically. The gas velocities, temperature and wall temperature distribution of the four channels with apex angles of 30 ° and 60 ° are measured. In order to extend the limited experimental data to other triangular channels, the effects of the thickness of the sidewall and the heat transfer enhancement of heat transfer on the heat transfer in the isotropic triangular channel The problem of turbulent heat transfer is numerically calculated and the effects of thermal conductivity of the sidewalls and the roughness of the wall are taken into account in the calculation. The calculated results are in good agreement with the experimental results. Triangular channels are used in the cooling of aeroengine blades and in the design of chemical equipment and heat exchangers Have very important application. The research on the convective heat transfer in the triangular channel in the literature reports mainly focuses on the two cases of the small apex isosceles triangle and the equilateral triangle. Therefore, it is very meaningful to further study the convective heat transfer of the triangular channel .