Tip-leakage flows for a linear compressor cascade and a one-stage shrouded pump rotor are discussed in this paper. A numerical method solving the Reynolds averaged Navier Stokes equations is used to explore various detail features of the tip-leakage flows. Calculation results for the cascade provide an assessment for predicting flow past a non-rotating blade passage with zero and 2% chord clearances. On the other hand, the pump rotor configuration provides a swirling passage flow with the complication of a trailing-edge separation vortex mixed with the tip-clearance and passage vortices and produces a very complex three-dimensional flow in the rotor wake. The physical aspects of the tip-clearance flows are discussed including suction-side reloading and pressure-side unloading due to a tip clearance and formation and transportation of the tip-leakage vortex. Detailed velocity comparisons in the blade passage and the tip gap region are shown to indicate the difficulty of predicting tip-leakage flow. The pressure at the core of the tip vortex is also examined to evaluate the strength of the tip-leakage vortex. Some computational guidelines for design usage are provided for these tip-leakage flow calculations.
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ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
June 2–5, 1997
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7868-2
PROCEEDINGS PAPER
Characteristics of Tip-Clearance Flows of a Compressor Cascade and a Propulsion Pump Free
Y. T. Lee,
Y. T. Lee
David Taylor Model Basin, West Bethesda, MD
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M. J. Laurita,
M. J. Laurita
David Taylor Model Basin, West Bethesda, MD
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J. Feng,
J. Feng
The Pennsylvania State University, State College, PA
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C. L. Merkle
C. L. Merkle
The Pennsylvania State University, State College, PA
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Y. T. Lee
David Taylor Model Basin, West Bethesda, MD
M. J. Laurita
David Taylor Model Basin, West Bethesda, MD
J. Feng
The Pennsylvania State University, State College, PA
C. L. Merkle
The Pennsylvania State University, State College, PA
Paper No:
97-GT-036, V001T03A003; 11 pages
Published Online:
December 24, 2014
Citation
Lee, YT, Laurita, MJ, Feng, J, & Merkle, CL. "Characteristics of Tip-Clearance Flows of a Compressor Cascade and a Propulsion Pump." Proceedings of the ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery. Orlando, Florida, USA. June 2–5, 1997. V001T03A003. ASME. https://doi.org/10.1115/97-GT-036
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