A general numerical method is developed with the capability to predict the transient thermal boundary layer response under various flow and thermal conditions. The transient thermal boundary layer variation due to a moving compressible turbulent fluid of varying temperature was numerically studied on a 2-D semi-infinite flat plate. The Reynolds-averaged boundary-layer equations are solved based on the compressible Falkner-Skan transformation. Turbulence is modeled using a two-layer eddy-viscosity model developed by Cebeci and Smith, and the turbulent Prandtl number formulation originally developed by Kays and Crawford. The governing differential equations are discretized with the Keller-box method. The numerical accuracy is validated through grid independence studies and comparison with the steady state solution. In turbulent flow as in laminar, heat transfer coefficient is initially very different from that obtained from quasi-steady analysis. It is found that, both the transient time scale and the magnitude of the transient heat transfer coefficients differ significantly between turbulent and laminar flow. The more complex variation of transient heat transfer rate in turbulent flow is evident, and needs further study.
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ASME 2008 International Mechanical Engineering Congress and Exposition
October 31–November 6, 2008
Boston, Massachusetts, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4871-5
PROCEEDINGS PAPER
Transient Thermal Response of Turbulent Compressible Boundary Layers Available to Purchase
Hongwei Li,
Hongwei Li
Purdue University, West Lafayette, IN
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M. Razi Nalim,
M. Razi Nalim
Indiana University - Purdue University - Indianapolis, Indianapolis, IN
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Charles L. Merkle
Charles L. Merkle
Purdue University, West Lafayette, IN
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Hongwei Li
Purdue University, West Lafayette, IN
M. Razi Nalim
Indiana University - Purdue University - Indianapolis, Indianapolis, IN
Charles L. Merkle
Purdue University, West Lafayette, IN
Paper No:
IMECE2008-68788, pp. 711-720; 10 pages
Published Online:
August 26, 2009
Citation
Li, H, Nalim, MR, & Merkle, CL. "Transient Thermal Response of Turbulent Compressible Boundary Layers." Proceedings of the ASME 2008 International Mechanical Engineering Congress and Exposition. Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C. Boston, Massachusetts, USA. October 31–November 6, 2008. pp. 711-720. ASME. https://doi.org/10.1115/IMECE2008-68788
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