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为了得到最佳的冷却结构,在相同冷却气量下对发散孔单层壁与冲击/发散孔双层壁冷却结构的冷却效率进行了试验研究.试验保证相同的发散孔排布规律、热侧与冷侧进气温度、冷却气量、热气量以及热冷侧之间的空气压降,使用红外热像仪对发散孔壁的热侧壁面温度进行测量以得到冷却效率,并对两种结构的冷却效率进行对比分析.试验结果表明:在相同冷却开孔面积、相同冷热气条件下,冲击/发散孔双层壁的冷却效率要比发散孔单层壁大约高30%,这归因于冲击/发散冷却方式存在更高的换热强化能力.
In order to get the best cooling structure, the cooling efficiency of the single-wall and double-walled cooling wall with impact / divergent holes under the same cooling gas volume was experimentally studied.The test ensures the same arrangement of the divergent holes, Cold side inlet air temperature, cooling air volume, hot air quantity and air pressure drop between the hot and cold sides, the temperature of the hot side wall of the divergent hole wall is measured by the infrared camera to obtain the cooling efficiency, and the cooling of the two structures The experimental results show that the cooling efficiency of the double walls of impact / diffuser holes is about 30% higher than that of the single wall of the diffuser hole under the same cooling opening area and the same hot and cold air conditions, which is attributed to the impact / Divergent cooling there is a higher heat transfer enhancement.