Flow separation control using unsteady pulsed suction through endwall bleeding holes in a highly loaded compressor cascade

2018 ◽  
Vol 72 ◽  
pp. 455-464 ◽  
Author(s):  
Hongxin Zhang ◽  
Shaowen Chen ◽  
Qinghe Meng ◽  
Songtao Wang
Keyword(s):  
Flow Separation ◽  
Separation Control ◽  
Compressor Cascade ◽  
Flow Separation Control ◽  
Highly Loaded

Flow separation control on a highly loaded compressor cascade using endwall synthetic jets

2017 ◽  
Vol 232 (11) ◽  
pp. 2059-2075 ◽  
Author(s):  
Yong Qin ◽  
Yanping Song ◽  
Ruoyu Wang ◽  
Huaping Liu ◽  
Fu Chen
Keyword(s):  
Boundary Layer ◽  
Flow Separation ◽  
Pressure Rise ◽  
Synthetic Jets ◽  
Separation Control ◽  
Compressor Cascade ◽  
Flow Separation Control ◽  
Maximum Loss ◽  
Wall Flows ◽  
Highly Loaded

This paper presents flow separation control conducted on a highly loaded compressor stator cascade using endwall synthetic jets. Numerical methods are employed and mechanisms of endwall synthetic jets in improving the cascade performance are discussed in detail. The influence of several actuation parameters is also investigated. Results show that endwall synthetic jets are able to improve the flows in the blade passage significantly, a maximum loss reduction of 21.63% and a pressure rise increment of 5.60% are obtained at design condition. Apart from energizing the low momentum fluid inside endwall boundary layer by streamwise momentum addition, endwall synthetic jets could induce a streamwise jet vortex and impede the transverse movement of endwall boundary layer through upwash and downwash. Hence, at the expense of slightly degraded near-wall flows, the formation and further evolution of passage vortex would be delayed and flows in the midspan region would be improved notably. The effectiveness of endwall synthetic jets relies on the proper selection of actuation position and jet angle. Flow control turns out to be the most efficient when the actuator is positioned at just upstream of corner separation region with a relatively small jet angle, and a large enough injected momentum is also necessary. Additionally, the adaptability of the actuation at off-design conditions is validated in the present study.

Flow separation control by using bowed blade in highly loaded turbine cascades

2009 ◽  
Vol 52 (6) ◽  
pp. 1471-1477 ◽  
Author(s):  
ChunQing Tan ◽  
HuaLiang Zhang ◽  
HaiSheng Chen ◽  
XueZhi Dong ◽  
HongLei Zhao ◽  
...  
Keyword(s):  
Flow Separation ◽  
Separation Control ◽  
Flow Separation Control ◽  
Turbine Cascades ◽  
Highly Loaded

scholarly journals Active flow separation control at the outer wing

2019 ◽  
Vol 11 (4) ◽  
pp. 823-836 ◽  
Author(s):  
J. P. Rosenblum ◽  
P. Vrchota ◽  
A. Prachar ◽  
S. H. Peng ◽  
S. Wallin ◽  
...  
Keyword(s):  
Flow Separation ◽  
Separation Control ◽  
Flow Separation Control ◽  
Active Flow
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