NDLI: Effect of winglet geometry arrangement and incidence on tip clearance control in a compressor cascade

Content Provider	Springer Nature Link
Author	Han, Shaobing Zhong, Jingjun Lu, Huawei Kan, Xiaoxu Yang, Ling
Copyright Year	2014
Abstract	An experimental study is conducted to investigate the influences of blade tip winglet on the flow field of a compressor cascade. The tests are performed in a low speed linear cascade with stationary endwall, with three blade tip configurations, including the baseline tip, the suction-side winglet tip and the pressure-side winglet tip. The flowfield downstream of the cascade is measured using five-hole probe, from which the three-dimensional velocity field, vorticity field and pressure field are obtained. Static pressure measurements are made on the endwall above the blade row using pressure taps embedded in the plywood endwall. All measurements are made at both design and off-design conditions for tip clearance level of about 2 percent of the blade chord. The results revealed the incidence variation significantly affects the secondary flow and the associated loss field downstream of the cascade, where the tip leakage vortex and passage vortex exist as the major contributors on the field. The winglet geometry arrangements can change the trajectory of the tip leakage vortex. The suction-side winglet tip blade provides a lower overall total pressure loss coefficient when compared to the baseline tip blade and pressure-side winglet tip blade at all incidence angles.
Starting Page	381
Ending Page	390
Page Count	10
File Format	PDF
ISSN	10032169
Journal	Journal of Thermal Science
Volume Number	23
Issue Number	4
e-ISSN	1993033X
Language	English
Publisher	Science Press
Publisher Date	2014-07-18
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	blade tip winglet compressor cascade incidence tip clearance flow Classical Continuum Physics Engineering Fluid Dynamics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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