湿空气透平冷却技术研究
摘要：为了研究湿空气对透平叶片冷却的影响特性，构建湿空气透平冷却性能预测模型，建立了常压透平叶片冷却实验平台，开展了以湿空气为冷却工质的实验研究。在湿空气含湿量为15~80g/kg、温度为200℃的条件下，对叶片前缘冲击冷却、肋片扰流U型通道冷却和叶片尾缘柱肋冷却进行了实验研究，探究了不同雷诺数下3种冷却方式的靶面换热性能随含湿量和温度的变化规律。研究结果表明：靶面换热强度随冷气含湿量的提高而增强，随冷气温度的提高而减弱，随冷气雷诺数的提高而增强。在含湿量约为180g/kg时，相对于干空气，冲击冷却、肋片扰流U型通道冷却、柱肋冷却的靶面平均努塞尔数最大分别提高了6.5%、10.0%、9.2%。
Abstract:In order to study the influence of humid air on the cooling performance of turbine blade and build the cooling performance prediction model of humid air turbine, the experimental platform of normal pressure turbine blade cooling was established, and the experimental study of humid air as coolant medium was carried out. Under the condition of humid air moisture content of 15-80g/kg and temperature of 200℃, the impingement cooling of blade leading edge, the U-channel cooling of fin disturbing flow and the pin-fin cooling of blade trailing edge were experimentally studied. The variation of heat transfer performance of the target wall with moisture content and temperature under different Reynolds numbers was explored. The results indicate that the heat transfer intensity of the target wall increases with the increasing coolant humid ratio, the decreasing coolant temperature and the increasing coolant Reynolds number. When using the humid air with moisture content of 180g/kg, the area-averaged Nussult number of target wall for impingement cooling, U-channel cooling and pin-fin cooling increases by 6.5%, 10.0% and 9.2% respectively, compared with the case using dry air.
标题：湿空气透平冷却技术研究
title:Study on Humid Air Turbine Cooling Technique
作者：朱华, 严彪, 刘雨松, 李亮
authors:Hua ZHU, Biao YAN, Yusong LIU, Liang LI
关键词：燃气轮机,湿空气透平,冷却工质,冷却性能,
keywords:gas turbine,humid air turbine,coolant medium,cooling performance,
发表日期：2021-08-31
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