Analysis and characterization of ramp flow separation

Autor: Kourta, Azeddine, Thacker, Adrien, Joussot, Romain
Přispěvatelé: Kourta, Azeddine, PRISME, Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique et Energétique (PRISME), Université d'Orléans (UO)-Ecole Nationale Supérieure d'Ingénieurs de Bourges (ENSI Bourges)-Université d'Orléans (UO)-Ecole Nationale Supérieure d'Ingénieurs de Bourges (ENSI Bourges)
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Experiments in Fluids
Experiments in Fluids, Springer Verlag (Germany), 2015, 56, pp.104
ISSN: 0723-4864
1432-1114
Popis: International audience; Two-dimensional separation on 25°-ramp is studied experimentally in closed-loop wind tunnel. The analysis of the flow conditions and the separation is based on wall pressure distribution, velocity fields obtained by 2D-2C PIV measurements, and velocity profiles obtained by 2C LDV measurements. The boundary layer upstream and downstream the ramp is characterized. To control the longitudinal pressure gradient, a trailing edge flap is used and the flap angle effects are studied. When the flap angle is equal to +7.5°, the flow around leading edge is symmetric, but the separation is 3D. For the case where the flap is not slanted (0°), the separation is 2D. Proper orthogonal decomposition is used to characterize the separation unsteadiness.
Databáze: OpenAIRE
Externí odkaz: