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Effects of curvature and rotation on turbulence in the NASA low-speed centrifugal compressor impellerThe flow in the NASA Low-Speed Impeller is affected by both curvature and rotation. The flow curves due to the following: (1) geometric curvature, e.g. the curvature of the hub and shroud profiles in the meridional plane and the curvature of the backswept impeller blades; and (2) secondary flow vortices, e.g. the tip leakage vortex. Changes in the turbulence and effective turbulent viscosity in the impeller are investigated. The effects of these changes on three-dimensional flow development are discussed. Two predictions of the flow in the impeller, one with, and one without modification to the turbulent viscosity due to rotation and curvature, are compared. Some experimental and theoretical background for the modified mixing length model of turbulent viscosity will also be presented.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Moore, Joan G.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Moore, John
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1992
Publication Information
Publication: NASA. Goddard Space Flight Center, Tenth Workshop for Computational Fluid Dynamic Applications in Rocket Propulsion, Part 1
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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