An improved two equation model of turbulence has been developed with the objective of applying it to predicting the turbine blade film cooling problem. The model employs an equation for the turbulent time scale, tau, instead of the epsilon equation and thereby eliminates the ad-hoc prescription of boundary conditions as well as the anomalous behavior of epsilon in the close proximity of a wall. Asymptotically consistent near wall damping functions have been developed and a two-layer approach has been employed to prescribe the near-wall behavior of the turbulent time scale, tau. The model thus developed, has been validated for wall bounded non-recirculating as well as recirculating flows and has also been tested for wall-free shear flow, showing improved predictions. A detailed and systematic, step-by-step development of the model along with validation results is being presented in this study.
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ASME 2012 Gas Turbine India Conference
December 1, 2012
Mumbai, Maharashtra, India
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4516-5
PROCEEDINGS PAPER
Development of an Improved K-Tau Model for Film Cooling Applications Available to Purchase
Asif Hoda,
Asif Hoda
International Islamic University, Kuala Lumpur, Selangor, Malaysia
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Sumanta Acharya
Sumanta Acharya
Louisiana State University, Baton Rouge, LA
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Asif Hoda
International Islamic University, Kuala Lumpur, Selangor, Malaysia
Sumanta Acharya
Louisiana State University, Baton Rouge, LA
Paper No:
GTINDIA2012-9578, pp. 443-451; 9 pages
Published Online:
July 25, 2013
Citation
Hoda, A, & Acharya, S. "Development of an Improved K-Tau Model for Film Cooling Applications." Proceedings of the ASME 2012 Gas Turbine India Conference. ASME 2012 Gas Turbine India Conference. Mumbai, Maharashtra, India. December 1, 2012. pp. 443-451. ASME. https://doi.org/10.1115/GTINDIA2012-9578
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