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针对一种内冷通道射流腔交替布置在压力面和吸力面的叶片冷却结构,利用FLUENT软件对敷设热障涂层的气冷叶片温度分布进行了三维共轭传热计算,分析了热障涂层厚度对叶片金属基体表面温降水平的影响,同时对比了有/无考虑燃气与叶片表面辐射换热的叶片表面温度分布差异.研究结果表明:在叶栅通道燃气流进口总温为1 600K、冷却气流进口总温为700K的条件下,当冷却气流与主流流量之比约为7.47%、热障涂层厚度为0.2mm时,该叶片冷却结构的最高温度可以控制在1100K以内;在假设热障涂层表面发射率与金属壁面发射率相同的前提下,厚度0.15～0.35mm的热障涂层可获得的最大降温大约在80～180K范围内;考虑/不考虑辐射换热的叶片表面最大温差可以达到60K.
Aiming at a blade cooling structure in which the jet chamber of internal cooling channels are alternately arranged on the pressure surface and the suction surface, a three-dimensional conjugate heat transfer calculation is carried out by using FLUENT software to calculate the temperature distribution of the air cooling blade on which the thermal barrier coating is applied. Layer thickness on the surface temperature drop of the metal substrate, and compared the difference of the surface temperature distribution of the blade with / without considering the radiative heat transfer between the gas and the blade surface.The results show that the total temperature of the inlet of the gas flow in the cascade channel is 1 600K , The cooling air inlet total temperature of 700K conditions, when the ratio of cooling air flow to the mainstream flow is about 7.47%, the thickness of the thermal barrier coating is 0.2mm, the maximum temperature of the blade cooling structure can be controlled within 1100K; in the assumption Thermal barrier coating surface emissivity and metal wall emissivity under the same premise, the thickness of 0.15 ~ 0.35mm thermal barrier coatings available maximum cooling is about 80 ~ 180K range; consider / do not consider the radiation heat transfer blade surface The maximum temperature difference can reach 60K.