基于红外测温技术的气膜孔高温冷却实验  

High temperature cooling experiment of gas film hole based on infrared temperature measurement technology

作　　者：杨智方 郭春海 刘通 马立程 张文武[1] YANG Zhifang;GUO Chunhai;LIU Tong;MA Licheng;ZHANG Wenwu(Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo Zhejiang 315000,China;University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315000 [2]中国科学院大学,北京101408

出　　处：《航空动力学报》2024年第8期117-126,共10页Journal of Aerospace Power

摘　　要：设计了一种低成本、高精度的气膜冷效实验验证平台,针对平板样件不同结构的气膜孔进行高速高温火焰冲击实验,利用红外测温技术对实验平板的温度场进行数据采集与综合分析。实验结果表明:两种孔形x向的温度梯度都明显小于y向,但是猫耳孔在y向有更好的冷却效果;同时猫耳孔的x向综合冷却效率也优于圆柱孔,并且冷却气流更倾向于形成稳定的气膜覆盖;此外,猫耳孔在单位面积中的总体冷却效果要优于圆柱孔,但在冷气出口附近可能产生较大的热应力;同时得到,猫耳孔气膜冷却降温面积较圆柱孔而言也有较大提升。A low-cost,high-precision experimental verification platform of film cooling effect was designed.The high-speed and high-temperature flame impact experiment was carried out for the film holes with different structures of plate samples.The infrared temperature measurement technology was used to collect and analyze the temperature field of the plate.The results showed that the temperature gradient in x direction of the two hole shapes was smaller than that in y direction,but the cat-ear hole had better cooling effect in y direction;The x-direction comprehensive cooling efficiency of cat-ear hole was also better than that of cylindrical hole,and the cooling air flow was inclined to form a stable film cover;In addition,the overall cooling effect of cat-ear hole in unit area was better than that of cylindrical hole,but greater thermal stress may occur near the outlet of cold air.The cooling area of cat-ear hole film cooling was also larger than that of cylindrical hole.

关 键 词：异形孔 气膜冷却 红外热像仪 冷却效率 温度场 

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]