各向异性复合材料平板气膜冷却试验研究  

Experimental Study of Film Cooling Over a Composite Flat Plate With Anisotropic Thermal Conductivity

作　　者：屠泽灿 毛军逵 赵晓 TU Ze-Can ,MAO Jun-Kui ,ZHAO Xiao(Nanjing University of Aeronautics and Astronautics, College of Energy and Power Engineering, diangsu Province Key Laboratory of Aerospace Power System, Nanjing 210016, Chin)

机构地区：[1]南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室,南京210016

出　　处：《工程热物理学报》2018年第4期852-859,共8页Journal of Engineering Thermophysics

基　　金：南京航空航天大学研究生创新基地(实验室)开放基金(No.kfjj20160202)

摘　　要：针对导热系数各向异性的长纤维增韧复合材料平板,开展了气膜冷却效果的试验研究,详细分析了复合材料各向异性导热系数主方向同气膜出流角之间的偏角对气膜覆盖壁面冷却效果的影响.研究中发现,不同的偏角工况下,由于材料内部不同方向上导热能力的差异,气膜冷却的综合效果发生了较明显的改变.试验结果表明流向偏角α的增加,使得气膜覆盖壁面的平均综合冷却效率和温度分布均匀性均得到提升;展向偏角β对气膜覆盖壁面的平均综合冷却效率影响不大,但是β增加时,壁面温度分布的均匀性得到一定程度的改善。Experimental study was performed to investigate the film cooling performance for a flat plate with anisotropic thermal conductivity where the plate had a single row of round holes. The effects of two angles on the cooling effectiveness were studied, i.e. the axial angleα and the spanwise angleβ, with regards to the inclined angle between the main thermal conductivity in the plate and the mainstream flow direction. The results showed that the anisotropy of the thermal conductivity and the inclined angles affected the cooling effectiveness obviously. Both of the average cooling effectiveness and the uniformity of temperature distribution were improved with a larger α. The β had little influence on the average cooling effectiveness, but affected the uniformity of temperature distribution.

关 键 词：气膜冷却 综合冷效 导热各向异性 试验研究 复合材料 

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]