动叶多腔内通道换热特性研究  

Experimental study of heat transfer characteristics of multi-passage of rotor blade

作　　者：米国际 MI Guo-Ji(Xi＇an Aerotechnical College, Xiran 710077, Shanxi, China)

机构地区：[1]西安航空学院

出　　处：《实验力学》2018年第3期491-498,共8页Journal of Experimental Mechanics

基　　金：国家自然科学基金项目(项目编号:51575420);陕西省工业科技攻关项目(项目编号:2016GY-157);陕西省教育厅服务地方专项计划项目(项目编号:14JF011)

摘　　要：为深入了解涡轮动叶内部多腔通道的换热分布特性,建立了旋转内流通道换热实验系统,采用瞬态液晶测量方法研究了旋转多腔内通道模型表面换热特性,并借助三维数值模拟方法分析多腔内通道的流动换热机理。研究结果表明：多段通道连接转弯造成上、下游流动分离,影响壁面换热系数分布;旋转附加作用力造成多腔通道的流场结构变化,改变了多腔连接通道壁面换热分布的均匀性;旋转作用产生的哥氏力造成通道内流速分布发生偏移,使径向流动通道前、后缘壁面换热系数差值增大;带肋通道的沿程平均换热系数呈波状分布,沿流向逐渐减小;旋转作用产生的哥氏力使转弯下游肋间的高换热区域向肋的背风面偏移。In order to deeply understand the heat transfer distribution characteristics in multi-passage of turbine rotor blade,a heat transfer experimental system for rotating inner flow passage was established.A transient liquid crystal measurement method was used to study the surface heat transfer characteristics of a rotating multi inner passage model.At the same time,the mechanism of flow heat transfer in multi inner passage was analyzed by three-dimensional numerical simulation.Results show that the upstream and downstream flow separation due to the turn corner made by multi channel connection affects the heat transfer coefficient distribution on the wall.The rotating additional force causes flow field structure change in multi-passages,and changes heat transfer distribution uniformity on multi-passages wall.Coriolis force produced by rotation causes the shifting of flow velocity distribution in passage,so that the difference of heat transfer coefficient between front and back wall in radial passage increases.The average heat transfer coefficient along the passage with rib presents a wavy distribution,and decreases gradually along the flow direction.The Coriolis force produced by rotation causes the shifting of high heat transfer region downstream the bend towards to the leeward side of the rib.

关 键 词：动叶多腔通道 对流传热 旋转数 瞬态液晶 数值模拟 

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]