抽吸孔对交叉肋冷却通道内部流动和传热的影响  

Effect of bleed hole on internalow and heat transfer in matrix cooling channel

作　　者：孙海鸥[1] 李良才 胡亮 卜诗 栾一刚[1] SUN Haiou;LI Liangcai;HU Liang;BU Shi;LUAN Yigang(College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2021年第4期535-540,573,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51509052,51309063);中央高校基本科研业务费专项资金项目(HEUCF150305).

摘　　要：为了研究燃气轮机涡轮叶片内部结构的冷却性能,本文采用基于雷诺平均的数值计算方法,获得交叉肋冷却通道内部流场和传热系数分布。研究结果表明:抽吸效应在孔附近产生很强的传热区域,可以改变子通道内的流动结构。子通道内的强制纵向涡是通道整体传热得到强化的重要因素。孔的位置分布对内部流动和传热的影响最大。25%的抽吸量就能够维持交叉肋通道的良好的冷却性能,通过合理布置抽吸孔能够提高交叉肋通道的综合热效率。The Reynolds-Averaged Navier-Stokes simulation was used to study the cooling performance of the internal structure of gas turbine blades,presenting a detailed internaloweld and heat transfer distribution of matrix cooling channel.The results indicate that the heat transfer augmentation was caused by large-scale streamwise vortexes that dominate the sub-channelow.Extraction can create extremely high heat transfer enhancement around bleed holes and alter theow structures in the sub-channel.The forced longitudinal vortex in the sub-channel is a crucial factor in enhancing the overall heat transfer of the channel.The bleed position has the most influence on the internalow and heat transfer.The internal matrix cooling capacity can be maintained with 25%mass extraction.A reasonable arrangement of bleed holes can improve the thermal performance of the matrix cooling channel.

关 键 词：叶片冷却 交叉肋冷却结构 抽吸孔 对流冷却 强化传热 综合热效率 雷诺平均法 燃气轮机 

分 类 号：V235.1[航空宇航科学与技术—航空宇航推进理论与工程]