Film cooling is certainly the most diffused system to protect metal surface against hot gases, both in turbogas blades and combustors. Although being very diffused, there are still several aspects of its behavior which need a better understanding. Mainly, the performance of multi-row holes configurations are still estimated correcting single-row correlations. Heat transfer coefficient modifications due to the presence of injected coolant are hard to evaluate, and even now few studies in literature take into account this factor. The present work is a detailed numerical study of some effects of film cooling. 3D CFD-RANS simulations have been performed to infer interesting trends of adiabatic superposition effects and conjugate heat transfer performances. In particular, several calculations have been carried out to evaluate single row and multi-row film cooling behavior in terms of heat transfer coefficient, overall and adiabatic effectiveness. Test were conducted with blowing ratios between 0.5 and 5.5, coolant Reynolds from 1000 to 16000.

Film Cooling System Numerical Design: Adiabatic and Conjugate Analysis / B. FACCHINI; M. SURACE; A. ANDREINI; C. CARCASCI. - ELETTRONICO. - 3:(2005), pp. 9-20. (Intervento presentato al convegno ASME PAPER (HT2005-72042), 2005 SUMMER HEAT TRANSFER CONFERENCE, JULY 17-22, 2005, SAN FRANCISCO (CA), USA tenutosi a San Francisco, California, USA nel July 17–22, 2005) [10.1115/HT2005-72042].

Film Cooling System Numerical Design: Adiabatic and Conjugate Analysis

FACCHINI, BRUNO;SURACE, MARCO;ANDREINI, ANTONIO;CARCASCI, CARLO
2005

Abstract

Film cooling is certainly the most diffused system to protect metal surface against hot gases, both in turbogas blades and combustors. Although being very diffused, there are still several aspects of its behavior which need a better understanding. Mainly, the performance of multi-row holes configurations are still estimated correcting single-row correlations. Heat transfer coefficient modifications due to the presence of injected coolant are hard to evaluate, and even now few studies in literature take into account this factor. The present work is a detailed numerical study of some effects of film cooling. 3D CFD-RANS simulations have been performed to infer interesting trends of adiabatic superposition effects and conjugate heat transfer performances. In particular, several calculations have been carried out to evaluate single row and multi-row film cooling behavior in terms of heat transfer coefficient, overall and adiabatic effectiveness. Test were conducted with blowing ratios between 0.5 and 5.5, coolant Reynolds from 1000 to 16000.
2005
Proceedings of the ASME Summer Heat Transfer Conference
ASME PAPER (HT2005-72042), 2005 SUMMER HEAT TRANSFER CONFERENCE, JULY 17-22, 2005, SAN FRANCISCO (CA), USA
San Francisco, California, USA
July 17–22, 2005
B. FACCHINI; M. SURACE; A. ANDREINI; C. CARCASCI
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/23104
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