雷诺数对涡轮叶片换热影响的研究  

COMPARATIVE ANALYSIS OF TURBINE BLADE SURFACE HEAT TRANSFER AT DIFFERENT REYNOLDS NUMBERS

作　　者：王鹏[1] 邹正平[1] 刘斌[1] 叶建[1] 周志翔[2] 李维[2] 

机构地区：[1]北京航空航天大学航空发动机气动热力国家级重点实验室,北京100191 [2]中国航空动力机械研究所,株洲412002

出　　处：《工程力学》2012年第9期349-358,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(50776003)

摘　　要：雷诺数的改变会引起涡轮叶片边界层等流态的改变,进而对叶片表面的对流换热产生强烈影响。该文首先结合实验数据对影响流热耦合计算精度的若干因素的敏感性进行了分析;然后在此基础上,针对MarkⅡ叶型分析了雷诺数对涡轮叶片表面换热的影响。结果表明:流热耦合计算时相关参数的选择对模拟的精度有明显影响,该文针对MarkⅡ叶型得到的一套参数是合理的,相关结果与实验吻合良好;雷诺数的变化使得边界层等流动状态发生改变,从而导致涡轮叶片表面对流换热状态和温度分布产生明显的差异。Flow patterns of turbine blades such as the boundary layer will change with Reynolds number and then impact the heat transfer on the blade surface. This paper firstly analyzes the sensitivity of several factors in conjugate heat transfer （CHT） simulation combined with experimental data. On the basis, the influence of Reynolds number on the blade surface heat transfer is analyzed for a Mark Ⅱ blade. The results show that the relevant parameters in CHT can significantly influence the accuracy of simulation; and the parameters selected for the Mark Ⅱ blade in the current paper are reasonable, which match well with the experiment data. The variation of Reynolds number cause the change of the blade boundary layer flow state and then significantly influence the heat transfer and temperature distribution on the turbine blade surface.

关 键 词：涡轮 数值模拟 流热耦合 雷诺数 计算精度 

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]