Study on Separated Flow around Prolate Spheroid at Incidence

Abstract

The separated flow field around prolate spheroid at incidence is investigated. The characteristics of flow field are investigated experimentally by the measurement of surface pressure distribution, the measurement of velocity distribution by use of 5-hole pitot tube and the flow visualization. Based on these results, the relationship between characteristics of separated flow field and surface pressure distribution is discussed. Vortex layer configuration and surface pressure distribution are calculated numerically by considering the shedding of vortex sheet, based on a slender body approximation. The agreement between measured vorticity distribution and calculated vortex layer configuration is relatively good. The comparison between the calculated pressure distribution and the measured one shows, however, the consideration of secondary separation as well as viscous diffusion and dissipation is necessary to obtain the agreement between them.