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Experimental and computational investigation of an 'open' transonic cavity flow

By K. Atvars, K. Knowles, S. A. Ritchie and Nicholas J. Lawson

Abstract

This paper presents an investigation of a transonic flow (M∞=0.85) over a rectangular cavity having a length-to-depth ratio of 5. Velocities were measured inside the cavity on the central plane and two off-centre planes using a two-component particle image velocimetry system. These measurements were supported by surface flow visualization, and mean and time-varying surface pressure measurements. The flow was also simulated using an unsteady Reynolds-averaged Navier-Stokes code, with a realizable k - ε turbulence model. It is shown that this CFD model does not capture all the characteristics of the flowfield correctly. However, by using this integrated experimental and computational approach we have been able to identify three-dimensional flowfield structures within the cavity. The influence of the thickness of the approaching boundary layer is discussed

Topics: transonic cavity, flow visualization, particle image velocimetry (PIV), unsteady Reynolds-averaged Navier-Stokes (URANS), CFD
Publisher: Professional Engineering Publishing
Year: 2009
DOI identifier: 10.1243/09544100JAERO445
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/5493
Provided by: Cranfield CERES
Journal:

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