Conjugate heat transfer analysis of film cooling flows
Abstract
The objective of this study is to evaluate the potential of various grids to satisfactorily simulate the development of a cooling film, using a coupled computation that takes into account the full geometry. Detailed computations of a single row of 30 degrees round holes on a flat plate are presented for blowing ratios of 0.764, 1.01 and 1.54. The simulation results are compared well with experimental data. The two-layer model gave more accurate results but consumed much more computational time than the standard wall functions. The k-ɛ turbulence model with wall functions with appropriate values of y+ is suitable for practical use. The results show the importance of the conjugate calculation for accurately describing the influence of the heat transfer within the cooling film.
- Publication:
-
Journal of Thermal Science
- Pub Date:
- March 2006
- DOI:
- 10.1007/s11630-006-0085-8
- Bibcode:
- 2006JThSc..15...85L
- Keywords:
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- film cooling;
- conjugate heat transfer;
- blowing ratio;
- TK124