NDLI: Toward optimum configuration of circumferential groove casing treatment in transonic compressor rotors

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Toward optimum configuration of circumferential groove casing treatment in transonic compressor rotors

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hah, Chunill
Copyright Year	2011
Description	The current paper first reviews experimental and numerical investigations to understand flow physics and to develop optimum configurations of circumferential grooves in compressor rotors. Circumferential grooves are used mainly to increase stall margin in axial compressors with small decrease in aerodynamic efficiency. Although circumferential groove casing treatment has been used widely, flow mechanisms of the circumferential grooves at near stall conditions are not well understood yet. Detailed time-dependent flow measurement inside tip gap in a high speed compressor is still a big challenge even though significant advance has been made in non-intrusive flow measurement technique. Therefore numerical approaches have been used to study relevant flow physics. However, optimum design of circumferential grooves to a given compressor with the computational tools is not practical yet. In the present paper, various investigations to study flow physics of circumferential groove casing treatment in axial compressor are reviewed first. Possible missing flow physics are identified and future research efforts for the optimum design are discussed.
File Size	1843647
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110014481
Archival Resource Key	ark:/13960/t2993730m
Language	English
Publisher Date	2011-07-24
Access Restriction	Open
Subject Keyword	Mechanical Engineering Turbocompressors Time Dependence Compressor Rotors Fluid Dynamics Flow Measurement Transonic Compressors High Speed Nonintrusive Measurement Aerodynamic Characteristics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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