NDLI: Computational Investigation of Unsteady Flow Mechanisms in Compressors With Embedded Supersonic Rotors

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Wall, Allan Van De Breeze-Stringfellow, Andrew Dailey, Lyle
Copyright Year	2006
Abstract	An investigation of unsteady flow mechanisms in compressor stages with supersonic relative Mach numbers at the inlet to the embedded rotors is presented. Measurements of shock-stator vane interactions, discussed in the prior paper Langford et. al. (2005), form the basis for the validation of a modeling approach using the unsteady CFD code MSU TURBO. The experiment highlighted some unsteady flow processes that occur near the stator trailing edge as the shock from a downstream rotor interacts with the stator. The shock induces a time varying loading on the stator that results in a shed vortex. Comparisons between velocities derived from instantaneous flow measurements using Digital Particle Image Velocimetry (DPIV) and unsteady CFD at a similar instant in time show very good agreement. Details of the vortex circulation and vorticity distributions as computed by the CFD simulation also agree favorably with test measurements. The CFD technique used to match the cascade data was then applied to a 3-D embedded transonic stator-rotor stage. Details of the loss associated with the shed vortices are investigated.
Sponsorship	International Gas Turbine Institute
Starting Page	1767
Ending Page	1781
Page Count	15
File Format	PDF
ISBN	079184241X
DOI	10.1115/GT2006-90633
e-ISBN	0791837742
Volume Number	Volume 6: Turbomachinery, Parts A and B
Conference Proceedings	ASME Turbo Expo 2006: Power for Land, Sea, and Air
Language	English
Publisher Date	2006-05-08
Publisher Place	Barcelona, Spain
Access Restriction	Subscribed
Subject Keyword	Computational fluid dynamics Cascades (fluid dynamics) Rotors Flow measurement Compressors Unsteady flow Modeling Simulation Vortices Particulate matter Vorticity Stators Turbochargers Shock (mechanics) Mach number
Content Type	Text
Resource Type	Article

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