NDLI: Prediction of Aeroacoustic Resonance in Cavities of Hole-Pattern Stator Seals

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	David, N. Liliedahl Forrest, L. Carpenter Paul, G. A. Cizmas
Copyright Year	2010
Abstract	A Reynolds-averaged Navier-Stokes (RANS) solver developed in-house was used to simulate grazing channel flow past single and multiple cavities. The objective of this investigation was to predict fluid instabilities in hole-pattern stator seals. The numerical results generated with the RANS solver showed good agreement with those obtained using a commercial Large Eddy Simulation (LES) code. In addition, the numerical results agreed well with experimental data. Rossiter’s formula, a popular semi-empirical model used to predict frequencies of hole-tone acoustic instabilities caused by grazing fluid flow past open cavities, was modified using the RANS solver results to allow for its application to channel flows. This was done by modifying the empirical constant κ, the ratio of vortex velocity and the freestream velocity. The dominant frequencies predicted using the Rossiter’s formula with the new κ value matched well the experimental data for hole-pattern stator seals. The RANS solver accurately captured the salient features of the flow/acoustic interaction and predicted well the dominant acoustic frequencies measured in an experimental investigation. The flow solver also provided detailed physical insight into the cavity flow instability mechanism.
Sponsorship	International Gas Turbine Institute
Starting Page	349
Ending Page	361
Page Count	13
File Format	PDF
ISBN	9780791844014
DOI	10.1115/GT2010-23218
e-ISBN	9780791838723
Volume Number	Volume 6: Structures and Dynamics, Parts A and B
Conference Proceedings	ASME Turbo Expo 2010: Power for Land, Sea, and Air
Language	English
Publisher Date	2010-06-14
Publisher Place	Glasgow, UK
Access Restriction	Subscribed
Subject Keyword	Cavities Fluids Large eddy simulation Fluid dynamics Reynolds-averaged navier–stokes equations Vortices Stators Resonance Acoustics Channel flow Cavity flows Flow (dynamics)
Content Type	Text
Resource Type	Article

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