圆柱覆膜热线风速仪气动加热数值研究  

Numerical Study of Aerodynamic Heating in Film Coated Cylinder Hot-Wire Anemometer

作　　者：夏子龙[1,2] 王锁芳 XIA Zilong;WANG Suofang(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics Nanjing 210016,China;Aero-Engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]航空发动机热环境与热结构工业和信息化部重点实验室,南京210016

出　　处：《重庆理工大学学报（自然科学）》2018年第7期46-52,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目"基于恒压式热膜探头的高超声速流场测量关键技术研究"(51176075)

摘　　要：采用CFX软件和SST湍流模型对圆柱覆膜热线风速仪在高超声速流场中的气体流动和换热情况开展了稳态数值研究,分析了来流速度和基底导热系数及热膜热流密度对基底内部及热膜表面温度分布的影响。结果表明:基底内部温度分布受气动加热和热膜加热的共同作用;来流速度增大时,气动加热作用明显,热量在前缘点处耗散增大,基底和热膜表面温度快速增加,超音速范围内,影响尤为显著;基底内温差随导热系数增大而降低,随热流密度增大而增大;基底内和热膜表面平均温度均随热流密度增大而增大;考虑共轭换热时,热膜表面温差可降低约20%,对平均温度影响较小。The steady state numerical study on the heat transfer of cylindrical film coated hot wire anemometer in hypersonic flow field was carried out by using CFX software and SST turbulence model. The influence of incoming flow speed,thermal conductivity and hot film surface heat flux on the temperature distribution of the basement and surface of hot film were presented. The results show that the temperature distribution of the basement was influenced by both aerodynamic heating and hot film heating. The flow velocity increases,the aerodynamic heating effect increases and the heatdissipation increases in the front point,a rapid increase of the surface and inner basement temperature was observed,the effect was remarkable in supersonic range; the temperature difference in the basement decreases with the increase of heat transfer coefficient,and increases with the increase of heat flux; the average temperature of the surface and inner basement increases with the increase of heat flux; temperature difference on the surface of hot film can be reduced to about 20% when considering coupled heat transfer,which has little effect on the average temperature.

关 键 词：热线风速仪 气动加热 温度分布 共轭换热 

分 类 号：V216.8[航空宇航科学与技术—航空宇航推进理论与工程]