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燃气轮机高温透平中包含对流/导热/辐射等复杂传热现象。本文依托高温流热固耦合实验台,提出燃烧室与透平联合计算的方法,采用数值模拟和实验对比的方式分析了平板气膜冷却的对流/导热/辐射传热特性。同时研究了不同燃气吸收系数以及不同进口辐射条件对于平板气膜冷却的表面温度分布的影响。结果表明:辐射传热是燃气轮机首级高温叶片传热特性的重要影响因素,辐射传热使得实验平板温度抬升50～70 K,燃烧室/透平联合计算方法有效地分析了燃烧室出口辐射强度对高温平板气膜冷却辐射传热的影响;高温燃气辐射特性对于平板温度分布具有明显影响。
Gas turbine high temperature turbine convection / thermal / radiation heat transfer and other complex phenomena. Based on the high-temperature fluid-solid-solid coupling experiment bench, the method of combined calculation of combustion chamber and turbine is proposed. The convection / thermal conductivity / radiative heat transfer characteristics of flat film cooling are analyzed by numerical simulation and experimental comparison. At the same time, the effects of different gas absorption coefficient and different imported radiation conditions on the surface temperature distribution of flat film cooling were studied. The results show that radiative heat transfer is an important factor affecting the heat transfer characteristics of the first-stage high-temperature gas turbine blades. Radiation heat transfer raises the temperature of the experimental plate by 50-70 K. Combining with the combustor / turbine calculation method, the radiant intensity at the exit of the combustion chamber On the cooling film radiative heat transfer of the high temperature flat plate; the radiation characteristics of high temperature gas have a significant effect on the plate temperature distribution.