中国电机工程学报2016，Vol.36Issue(6)：1650-1657,1778,9.DOI:10.13334/j.0258-8013.pcsee.2016.06.021
蒸汽/空气两种介质在涡轮叶片中冷却性能对比的试验研究
Comparative Experiment of Cooling Performance in a Turbine Blade Cooled by Steam and Air Flow
摘要
Abstract
An annular cascade test was conducted in a high temperature tunnel. One blade in the annular cascade was respectively cooled by super-heated steam and air. The temperature distributions on the suction surface of the blade cooled by the two coolants were both measured by an infrared camera, and the cooling performance of the two coolants was compared with each other. Results show that: the steam cooling does not significantly change cooling efficiency distribution on blade surface, but the cooling performance for steam flow is obvious better than that for air flow. For example, in the design working condition of flow ratioω =0.026, the area-averaged cooling efficiencies of the front part and rear part of the suction surface are respectively increased by 15.5% and 13.4% in steam cooling than that in air cooling. At the same time, the relative temperatures of the two parts are reduced by 0.011 and 0.017, respectively. Comparing with traditional air cooling in blade, the advantages of steam cooling are very obvious.关键词
燃气轮机/高温风洞/蒸汽冷却/空气冷却/冷却效率Key words
gas turbine/high-temperature tunnel/steam cooling/air cooling/cooling efficiency分类
能源与动力引用本文复制引用
马超,黄名海,葛冰,吉雍斌,臧述升..蒸汽/空气两种介质在涡轮叶片中冷却性能对比的试验研究[J].中国电机工程学报,2016,36(6):1650-1657,1778,9.基金项目
国家自然科学基金项目(51206109)。 Project Supported by National Natural Science Foundation of China (51206109) （51206109）
