高湍流度格栅下游流场试验研究  

Experimental research of high turbulence intensity grid downstream flow field

作　　者：杨明[1] 张晓东[1] 刘志刚[1] 赵旺东[1] 王晖[1] 

机构地区：[1]中国燃气涡轮研究院,四川江油621703

出　　处：《燃气涡轮试验与研究》2016年第2期16-20,共5页Gas Turbine Experiment and Research

基　　金：航空科学基金项目(2012ZB24009)

摘　　要：为满足高湍流度下涡轮扇形叶栅气动与冷效试验的需求,试制了三种被动控制单平面方形格栅并对其进行了试验验证。对格栅下游流场进行了详细的动态测量,并研究了测量位置、格栅尺寸和来流条件等对格栅下游流场湍流度的影响规律。结果表明,grid 3方案格栅能产生10%以上的湍流度,可作为湍流发生装置并满足后续研究要求;格栅几何特征对其下游湍流度影响显著;在试验范围内,来流速度对湍流度近乎无影响。Three kinds of single plane square grid were made to satisfy the requirements of high turbulence intensity condition for turbine sector cascade aerodynamics and cooling effect test, which were validated by experiments. The downstream flow field of the grid was measured in detail to obtain the effects of measure-ment position, gird geometry and inlet condition on the turbulence intensity. From the results, it can be seen that the grid 3 project could generate more than 10% turbulence intensity, which could satisfy the require-ments of the subsequent researches as turbulence generator. Grid geometry has great impact on the down-stream turbulence. The influence of the inlet flow velocity on the turbulence almost could be ignored in the test range.

关 键 词：高湍流度格栅 来流流场 涡轮叶栅 气动特性 冷效试验 热线风速仪 

分 类 号：V21[航空宇航科学与技术—航空宇航推进理论与工程]