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Blade scale effects of tip leakage

Author(s)
Martinez-Sanchez, Manuel; Gauthier, R. P.
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Massachusetts Institute of Technology. Gas Turbine Laboratory
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Abstract
The effects of blade-tip leakage in a turbine are investigated by modeling the stage as an incomplete actuator disk. It is found that the spanwise flow redistribution due to the gap is such as to produce a uniform unloading of the blades, despite the very concentrated leakage. Partial lift retention at the blade tip is accounted for based on a leakage jet-free stream collision model which successfully predicts the roll-up of the leakage flow. The predicted efficiency loss due to the gap correlates well with experimental data.
Description
October 1990
 
Includes bibliographical references (leaves 43-44)
 
Date issued
1990
URI
http://hdl.handle.net/1721.1/104742
Publisher
Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1990]
Series/Report no.
GTL-202GT & PDL report ; no. 202

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