涡轮叶片U型冷却通道旋转流动特性模拟  

Simulation of rotating flow characteristics in U-shaped cooling channel of turbine blade

作　　者：丁旭 吴传伟 刘涛[1] 宋江涛[1] DING Xu;WU Chuanwei;LIU Tao;SONG Jiangtao(Chinese Flight Test Establishment, Aviation Industry Corporation of China Limited, Xi'an 710089, China;Harbin Institute of Technology, Harbin 150001, China)

机构地区：[1]中国航空工业集团有限公司中国飞行试验研究院,陕西西安710089 [2]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《火箭推进》2022年第3期50-56,共7页Journal of Rocket Propulsion

基　　金：国家自然科学基金(91741204)。

摘　　要：为了研究发动机涡轮叶片U型通道在旋转条件下的流动特性,采用Fluent中双精度速度压力耦合求解器的简单算法,湍流模型采用k-ωSST模型,压力动量项和密度项用二阶迎风差分格式数值计算,能量项用快速格式计算,建立了旋转条件下涡轮叶片U型通道内的数值模拟方法,分析对比了静止条件下和旋转条件下U型通道内的流动特性。结果表明,相对于静止条件,旋转使得U型通道内液体的流动更加复杂,二次流现象更加严重,湍流程度加剧,换热加强,在科氏力作用下径向出流和径向入流呈相反的流动,在横管段由于旋转和迪恩涡双层作用,换热效果最强。In order to study the flow characteristics in U-channel of engine turbine blade under rotating condition,a numerical simulation method for U-channel of turbine blade under rotating condition is established by fluent.In the simulation with fluent,the simple algorithm of the double-precision velocity-pressure coupled solver is used,the k-ωSST model is used for the turbulence model,the second-order upwind difference scheme is used for the pressure momentum term and density term,the fast scheme is used for the calculation of energy term.The flow characteristics in U-channel under the static condition and the rotating condition are analyzed and compared.The results show that compared with the static condition,rotation makes the flow of liquid in the U-shaped channel more complicated and the secondary flow more serious,the degree of turbulence intensifies and the heart transfer is enhanced.Under the action of Coriolis force,the radial outflow and the radial inflow flow are opposite.In the horizontal pipe section,the heat transfer effect is the strongest due to the combined effect of rotation and Dean Vortex.

关 键 词：旋转叶片 U型冷却通道 涡流 二次流 叶片冷却 

分 类 号：V235.21[航空宇航科学与技术—航空宇航推进理论与工程]