摘要
对串列叶栅的尾迹特性进行了实验研究。研究表明：串列叶栅尾迹平均速度和单列一样满足相似律。串列叶栅的尾迹平均速度和紊流脉动速度沿额线方向比单列叶栅变化平缓。对于串列叶栅在叶栅下游相对距离Ｘ／ＣＴ＞０．７时，尾迹纵向紊流度基本不随距离Ｘ／ＣＴ变化。
The characteristics of wake behind tandem cascades, making a contrast to that of a single-row, are investigated by experiments. The results are concluded as follows. The mean wake velocity profiles behind tandem cascades satisfy the self-similarity, similar to that behind the single-row cascade. Behind the tandem cascades, the variations of mean velocity and turbulence intensity along the tangential direction become more gentle than that behind the single-row cascade. In the down-stream of the tandem cascades, the longtudial turbulence intensity almost does not vary at a relative distance of X/CT>0. 7.
出处
《南京航空航天大学学报》
CAS
CSCD
1994年第4期555-559,共5页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
串列叶栅
紊流尾迹
航空发动机
tandem cascade
turbulent wake
turbulence intensity
single-row cascade
characteristics of wake
