Connexion utilisateur 0 Panier
Accueil Livres eBooks Revues spécialisées Références et comptes rendus Auteurs, éditeurs, examinateurs Index A-Z des produits
Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN Imprimer: 1-56700-135-1

COMPRESSIBILITY EFFECTS IN THE HIGH-SPEED, REACTING SHEAR LAYER

Résumé

Thermodynamic variables exert a strong influence on the flow field in high-speed combustion. Direct simulation of the shear layer is used to investigate the coupling between thermodynamic fluctuations and the turbulent flow in subsonic-to-supersonic regimes and over a wide range of density ratios. The high-speed effect is parametrized by the convective Mach number, Mc, while density heterogeneity is characterized by the ratio of free-stream densities, s = ρ21 With increasing Mc, a large reduction in thickness growth rate is observed. Analysis and direct simulation is used to offer a mechanism based on the finite speed of pressure fluctuations and consequent temporal decorrelation to explain the reduced growth rate in the high-speed regime. The character of the underlying thermodynamic fluctuations is found to change from the uniform density case to the non-uniform cases. The acoustic mode dominates the former while the entropy mode dominates the latter. An increase of the density fluctuations, with increasing s, is observed while pressure fluctuations decrease.
Accueil Portail numérique Begell Bibliothèque numérique Begell Revues spécialisées Livres eBooks Références et comptes rendus Auteurs, éditeurs, examinateurs Index A-Z des produits Prix et politiques d'abonnement A propos de Begell House Contactez-nous Language English 中文 Русский 日本語 Português Deutsch Français Español