Examination of flow around second-generation controlled diffusion compressor blades in cascade at stall
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Authors
Fitzgerald, Kevin D.
Subjects
Controlled diffusion
Compressor
Stator
Cascade
Turbomachinery
Laser Doppler velocimetry
Compressor
Stator
Cascade
Turbomachinery
Laser Doppler velocimetry
Advisors
Hobson, Garth V.
Date of Issue
2004-06
Date
June 2004
Publisher
Monterey California. Naval Postgraduate School
Language
Abstract
The flow around second-generation controlled-diffusion blades in cascade at stall was examined experimentally through the use of a two-component laser-Doppler velocimeter. Blade surface pressure measurements were also preformed at mid span on the blades at various Reynolds numbers. Flow visualization techniques were used to observe and record the flow on the surface of the blade. A correlation between the experimental results and computational fluid dynamic predictions was attempted in order to determine the exact nature of the flow as the blades approached stall, to further assist in the development of advanced blade design. The blade surface pressure measurements showed that the mid-span section of the blade was at a lower loading than previously measured at a smaller inlet flow angle. This indicated that the blade section was at stall. The flow visualization highlighted the extent of the three-dimensional flow over the blades. The LDV measurements documented the mid-span boundary layer and wake profiles.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Astronautical Engineering (MAE)
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
x, 65 p. : ill. (some col.)
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.