This paper describes the modifications made to a successful attached flow transition model to produce a model capable of predicting both attached and separated flow transition. This transition model is used in combination with the Fluent CFD software, which is used to compute the flow around the blade assuming that it remains entirely laminar. The transition model then determines the start of transition location and the development of the intermittency. These intermittency values weight the laminar and turbulent boundary layer profiles to obtain the resulting transitional boundary layer parameters. The ERCOFTAC T3L test cases are used to validate the predictions. The T3L blade is a flat plate with a semi-circular leading edge, which results in the formation of a separation bubble the length of which is strongly dependent on the transition process. Predictions were performed for five T3L test cases for differing free-stream turbulence levels and Reynolds numbers. For the majority of these test cases the measurements were accurately predicted.
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July 2005
Technical Papers
Predicting Transitional Separation Bubbles
John A. Redford,
John A. Redford
Department of Engineering, University of Liverpool
, Brownlow Hill, Liverpool, Merseyside L69 3GH, UK
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Mark W. Johnson
Mark W. Johnson
Department of Engineering, University of Liverpool
, Brownlow Hill, Liverpool, Merseyside L69 3GH, UK
Search for other works by this author on:
John A. Redford
Department of Engineering, University of Liverpool
, Brownlow Hill, Liverpool, Merseyside L69 3GH, UK
Mark W. Johnson
Department of Engineering, University of Liverpool
, Brownlow Hill, Liverpool, Merseyside L69 3GH, UK J. Turbomach. Jul 2005, 127(3): 497-501 (5 pages)
Published Online: March 1, 2004
Article history
Received:
October 1, 2003
Revised:
March 1, 2004
Citation
Redford, J. A., and Johnson, M. W. (March 1, 2004). "Predicting Transitional Separation Bubbles." ASME. J. Turbomach. July 2005; 127(3): 497–501. https://doi.org/10.1115/1.1860573
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