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Simulation of turbine blade trailing edge cooling / Jongwook Joo in Transactions of the ASME . Journal of fluids engineering, Vol. 131 N° 2 (Fevrier 2009) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 2 (Fevrier 2009) . - 14 p. Titre : Simulation of turbine blade trailing edge cooling Type de document : texte imprimé Auteurs : Jongwook Joo, Auteur ; Durbin, Paul, Auteur Année de publication : 2009 Article en page(s) : 14 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : flow  (dynamics);  temperature;  cooling;  turbulence;  eddies  (fluid  dynamics);  simulation;  engineering  simulation;  Reynolds-averaged  Navier–Stokes  equations Résumé : The cause of overprediction of cooling efficiency by unsteady Reynolds averaged simulations of turbine blade trailing edge cooling flow is investigated. This is due to the deficiency in the level of unsteady coherent energy very near to the wall. Farther from the wall, the Reynolds averaged simulation produces the correct level of mixing. Eddy simulations of the instantaneous turbulent eddying produce a close agreement to data on film effectiveness. In particular, they reproduce the reduction in cooling effectiveness toward the trailing edge that has been seen in experiments. The scale adaptive simulation model of Menter and Egorov (2005, “ A Scale-Adaptive Simulation Modeling Using Two-Equation Models,” AIAA Paper No. 2005-1095) is invoked for the eddy simulations. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] [article] Simulation of turbine blade trailing edge cooling [texte imprimé] / Jongwook Joo, Auteur ; Durbin, Paul, Auteur . - 2009 . - 14 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 2 (Fevrier 2009) . - 14 p. Mots-clés : flow  (dynamics);  temperature;  cooling;  turbulence;  eddies  (fluid  dynamics);  simulation;  engineering  simulation;  Reynolds-averaged  Navier–Stokes  equations Résumé : The cause of overprediction of cooling efficiency by unsteady Reynolds averaged simulations of turbine blade trailing edge cooling flow is investigated. This is due to the deficiency in the level of unsteady coherent energy very near to the wall. Farther from the wall, the Reynolds averaged simulation produces the correct level of mixing. Eddy simulations of the instantaneous turbulent eddying produce a close agreement to data on film effectiveness. In particular, they reproduce the reduction in cooling effectiveness toward the trailing edge that has been seen in experiments. The scale adaptive simulation model of Menter and Egorov (2005, “ A Scale-Adaptive Simulation Modeling Using Two-Equation Models,” AIAA Paper No. 2005-1095) is invoked for the eddy simulations. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...]