Mean and turbulent thermal fields due to film cooling via an eddy heat diffusivity closure

• Autorzy: Karcz M.
• Języki publikacji: EN

Abstrakty

EN

The two-equation level of turbulent heat flux modelling is considered for application in film cooling instead of the turbulent Prandtl number concept. The investigations involve numerical analysis of mean and fluctuating temperature fields near the coolant injection inlet. The results of the implemented coupled v2- f-k0-E0 model are compared with measurement data for a flat plate cooled with compound angle orientation of discrete in-jection holes. The results of numerical analysis agree very well with the experimental data. The coupled model offers a detailed picture of gas turbine cooling problems without using time-consuming, inherently unsteady models.

Słowa kluczowe

EN

v2- f-ko-Eo model; turbulent heat flux; temperature fluctuations; film cooling

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2006
• Tom: Vol. 10, No 4
• Strony: 377--390
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Karcz M.

• Institute of Fluid Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-952 Gdansk, Poland,

Bibliografia

• [1] Iacovides H and Launder B E 1995 Computational fluid dynamics applied to internal gas-turbine blade cooling: a review, Int. J. Heat Fluid Flow 16 454
• [2] Manceau R, Parneix S and Laurence D 2000 Turbulent heat transfer predictions using the v2-f model on unstructured meshes, Int. J. Heat Fluid Flow 21 320
• [3] Kim Y J and Kim S M 2004 Influence of shaped injection holes on turbine blade leading edge film cooling, Int. J. Heat Mass Transfer 47 245
• [4] Kohli A and Bogard D G 1998 Fluctuating thermal field in the near-hole region for film cooling flows, ASME J. Turbomachinery 120 86
• [5] Chmielniak T, Rusin A and Czwiertnia K 2001 Gas Turbines, Zakład Narodowy im. Ossolińskich, Wrocław (in Polish)
• [6] Gartshore I, Salcudean M and Hassan I 2001 Film cooling injection hole geometry: Hole shape comparison for compound cooling orientation, AIAA J. 39 1493
• [7] Medic G and Durbin P A 2002 Toward improved film cooling prediction, ASME J. Turbomachinery 124 193
• [8] Lakehal D, Theodoridis G S and Rodi W 1998 Computation of film cooling of a flat plate by lateral injection from a row of holes, Int. J. Heat Fluid Flow 19 418
• [9] Launder B E 1988 On the computation of convective heat transfer in complex turbulent flows, ASME J. Heat Transfer 110 1112
• [10] Nagano Y and Kim C 1988 A two-equation model for heat transport in wall turbulent shear flows, ASME J. Heat Transfer 110 583
• [11] Deng B, Wu Wand Xi S 2001 A near-wall two-equation heat transfer model for wall turbulent flows, Int. J. Heat Mass Transfer 44 691
• [12] Shikazono N and Kasagi N 1996 Second-moment closure for turbulent scalar transport at various Prandtl numbers, Int. J. Heat Mass Transfer 39 2977
• [13] Karcz M and Badur J 2005 An alternative two-equation turbulent heat diffusivity closure, Int. J. Heat Mass Transfer 48 2013
• [14] Medic G and Durbin P A 2002 Toward improved prediction of heat transfer on turbine blades, ASME J. Turbomachinery 124 187
• [15] Durbin P A 1993 Application of near-wall turbulence model to boundary layers and heat transfer, Int. J. Heat Fluid Flow 14 316
• [16] Behnia M, Parneix S, Shabany Y and Durbin P A 1999 Numerical study of turbulent heat transfer in confined and un confined impinging jets, Int. J. Heat Fluid Flow 23 1
• [17] Sveningsson A and Davidson L 2004 Assessment of realizability constraints in V2 - f turbulence models, Int. J. Heat Fluid Flow 23 785
• [18] Kays W M 1994 Turbulent Prandtl number - Where are we?, ASME J. Heat Transfer 116284
• [19] Karcz M. and Badur J. 2003 A turbulent heat flux two-equation closure based on the V2F turbulence model, TASK Quart. 7 375
• [20] 2005 Fluent User’s Guide, Fluent Inc. Lebanon, USA