单排冲击孔的冲击/气膜复合冷却结构火焰筒壁温分布  

Temperature Distribution of Flame Tube of an Impingement and Film Cooling Structure with Single Row Impact Hole

作　　者：朱诚 于小兵 陈思 赵婷杰 冯雯翠 ZHU Cheng;YU Xiao-bing;CHEN Si;ZHAO Ting-jie;FENG Wen-cui(Guiyang Engine Research Institute,Aero Engine Corporation of China,Guiyang 550081,China)

机构地区：[1]中国航发贵阳发动机设计研究所,贵阳550081

出　　处：《科学技术与工程》2024年第24期10552-10560,共9页Science Technology and Engineering

摘　　要：针对单排冲击孔的冲击/气膜复合冷却结构火焰筒建立一维壁温计算程序,对火焰筒一维壁温进行计算分析,通过示温漆测温法和热电偶测温法获得了高温高压下该火焰筒壁温分布规律和最高壁温值,并将试验结果与计算结果进行对比分析。结果表明:计算结果与试验结果吻合较好,该计算模型可有效评估冲击/气膜复合冷却结构火焰筒壁温分布趋势;将冲击孔布置在气膜段末端可有效降低该处壁温,从而控制最高壁温值;单位面积冷却气量对冷却效率有重要影响;火焰筒壁温分布较均匀,最高壁温低于材料长期许用工作温度。A one-dimensional wall temperature calculation program was established for a flame tube with impingement and film cooling structure with single row impact hole,and the one-dimensional wall temperature of the flame tube was calculated and analyzed.The distribution law and the highest wall temperature value of the flame tube under high temperature and high pressure were obtained through the temperature-indicating paint and thermocouple.The experimental results were compared and analyzed with the calculated results.The results show that the calculated results are in good agreement with the experimental results,and the calculation model can effectively evaluate the temperature distribution trend of the flame tube wall of the impingement and film cooling structure.It can effectively reduce the wall temperature by setting the impact hole at the end of the gas film section,so as to control the maximum wall temperature.The cooling gas volume per unit area has an important effect on the cooling efficiency.The wall temperature of the flame tube is more uniformly distributed,and the maximum wall temperature is lower than the material long-term permissible working temperature.

关 键 词：航空发动机 火焰筒 冲击/气膜冷却 壁温 示温漆测温 热电偶测温 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]