中文摘要：

本文采用流热耦合的数值计算方法，对某高温平板气膜冷却实验台试验段进行了数值模拟，主要研究内容包括：数值预测热障涂层对超级合金平板的热保护作用、主流加入水蒸气后对气膜冷却效果的影响以及平板内部温度沿板厚方向分布的特点。通过对数值模拟结果的分析发现，热障涂层能够有效地保护超级合金平板表面；主流加入水蒸气后气膜冷却效率会降低。此外，在射流孔附近区域，平板内部温度沿板厚方向的分布是非线性的，越远离射流孔，该温度分布越接近线性。

英文摘要：

We have carried out a numerical simulation of the fiat plate film cooling of an experiment which is to be conducted. The method used is the fluid-thermal coupling analysis method. This paper mainly deals with three issues： the impact of thermal barrier coating （TBC） on protecting the super alloy plate, the influence of the primary flow injected with water vapor on the film cooling efficiency and the temperature distribution inside the plate in its thickness direction. Through careful analysis, we have found that thermal barrier coating （TBC） can protect the plate surface efficiently, while the introduction of water vapor to the primary flow can decrease the efficiency of film cooling. Further, the temperature distribution inside the solid plate in its thickness direction is nonlinear in the region near the film cooling hole, and is approximately linear when the distance from the hole is long enough.