壁面导热对微型向心涡轮性能及流动影响  

Effects of Wall Heat Transfer on Performance and Flow for Micro Radial Inflow Turbine

作　　者：周琨[1] 边磊[1] 邹正平[1] 王雷[2] 

机构地区：[1]北京航空航天大学能源与动力工程学院/航空发动机气动热力国防重点实验室,北京100191 [2]中航工业沈阳发动机设计研究所涡轮室,辽宁沈阳110015

出　　处：《推进技术》2013年第9期1248-1256,共9页Journal of Propulsion Technology

摘　　要：为了探讨传热对于微型向心涡轮的性能和流动的影响规律,根据微型向心涡轮的特点,针对涡轮的轮毂侧壁面传热现象,建立了涡轮的气动性能随传热量变化的一维模型,并利用数值模拟对模型进行了验证,分析了不同传热量下微型向心涡轮的流动变化。结果表明所发展的模型有较好的精确度,可以用以评估传热对微型向心涡轮性能的影响;较大的传热会改变转子进口相对气流角并影响转子整个通道内的流动;涡轮对外传热使得涡轮输出功降低,涡轮效率明显降低。In order to investigate the effects of heat transfer on performance and flow characteristics of micro radial inflow turbine, one dimensional model for turbine performance has been established with only hub heat transfer due to the structure feature of the micro gas turbine. Then a numeral simulation has been carried out to verify the model as well as to analyze the flow feature of the turbine. Results show that the model is accurate enough to be used to evaluate the effects of heat transfer on the turbine performance. Due to heat transfer, the relative flow angle at the rotor inlet is increased and the flow state in the whole rotor passage is changed. Meanwhile, the output power and efficiency of the micro turbine decrease obviously

关 键 词：传热 向心涡轮 数值模拟 流动 性能 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]