Experimental study on the three-dimensional flow within a compressor cascade with tip clearance: Part I--Velocity and pressure fields
- Vrije Univ. Brussel, (Belgium). Dept. of Fluid Mechanics
Experimental results from a study of the three-dimensional flow in a linear compressor cascade with stationary endwall at design conditions are presented for tip clearance levels of 1.0, 2.0, and 3.3 percent of chord, compared with the no-clearance case. In addition to five-hole probe measurements, extensive surface flow visualizations are conducted. It is observed that for the smaller clearance cases a weak horseshoe vortex forms in the front of the blade leading edge. At all the tip gap cases, a multiple tip vortex structure with three discrete vortices around the midchord is found. The tip leakage vortex core is well defined after the midchord but does not cover a significant area in traverse planes. The presence of the tip leakage vortex results in the passage vortex moving close to the endwall and the suction side.
- OSTI ID:
- 5991174
- Journal Information:
- Journal of Turbomachinery; (United States), Vol. 115:3; ISSN 0889-504X
- Country of Publication:
- United States
- Language:
- English
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