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在高温热风洞中,应用红外热像系统对三个具有真实燃气轮机尺度的层板结构进行了冷却特性实验研究.为了描述冲击、对流及导热的综合作用,采用数字图像信号运算技术,直接获得描述冷却前后层板高温表面二维温差分布.通过比较三种层板结构综合冷却效率,详细讨论了绕流柱数目及直径、气膜孔角度、主流雷诺数和努塞尔数对层板冷却效率的影响.
In high-temperature hot-wind tunnel, the experimental study on the cooling characteristics of three laminates with real gas turbine scales was carried out by using infrared thermography system.In order to describe the combined effects of impact, convection and thermal conductivity, digital image signal processing was used to directly obtain Describing the two-dimensional temperature distribution on the high temperature surface before and after the cooling.Comparison of the cooling efficiency of the three laminates, the number and diameter of the flow around the column, the angle of the film holes, the mainstream Reynolds number and Nusselt number on the cooling of the laminates The impact of efficiency.