涡轮叶片内冷通道的磨料流光整加工特性  

Abrasive flow finishing characteristics of internal cooling channel of turbine blade

作　　者：郑志鑫 董志国 李孟楠 雷鸿博 ZHENG Zhixin;DONG Zhiguo;LI Mengnan;LEI Hongbo(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Precision Machining,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,太原030024 [2]精密加工山西省重点实验室,太原030024

出　　处：《金刚石与磨料磨具工程》2023年第1期110-117,共8页Diamond & Abrasives Engineering

基　　金：山西省自然科学基金(2021-0302-123104)。

摘　　要：航空涡轮叶片内部的多冷却通道多采用消失模铸造等方法制造,其表面粗糙度较高,冷却效率低,内部流道截面小且呈S形弯曲狭长分布,不容易抛光。用Polyflow软件对叶片内冷通道进行仿真,研究其内部压力场、速度场的变化情况。在工件的4个典型区域进行S形内流道加工试验,研究表面粗糙度与材料去除量的变化规律。结果表明:经仿真,压力下降的幅度沿流动方向逐渐变小,速度由通道中心向壁面逐渐减小;相同试验条件下,S形流道转弯处的表面粗糙度比直流道处的低;流道内存在沿程压力损失,区域A比区域D的材料去除量大4~5倍。The internal multi cooling channels of aviation turbine blades,mostly processed by lost foam casting,have high surface roughness,low cooling efficiency,small internal channel section and S-shaped bending and narrow distribution,and are not easy to polish.The Polyflow software is used to simulate the internal cooling channel of blade,and the changes of internal pressure field and velocity field are studied.The workpiece with S-shaped inner runner was machined and tested to study the variation law of surface roughness and material removal in four typical areas of the workpiece.The results show that the pressure drop decreases along the flow direction and the velocity decreases from the center of the channel to the wall;under the same test conditions,the surface roughness at the turning of S-shaped channel is lower than that at the straight channel;there is pressure loss along the flow path,and the material removal in area A is 4~5 times greater than that in area D.

关 键 词：磨料流加工 涡轮叶片 S形流道 Polyflow仿真模拟 内冷通道 

分 类 号：TG73[金属学及工艺—刀具与模具] TG58TG664