Accession Number : ADP008929

Title :   LDV Measurements of Turbulent Separated Flow Over a Cavity,

Corporate Author : TECHNICAL UNIV OF LISBON (PORTUGAL)

Personal Author(s) : Durao, D. F. ; Pereira, J. C. ; Sousa, J. M.

Report Date : 23 JUL 1992

Pagination or Media Count : 6

Abstract : LDV measurements of the mean and turbulent velocity characteristics are presented for turbulent flow over a cavity. Three different shapes for the impingement cavity edge, sharp, round and nose, were employed. The reported measurements covered two particular regimes: low Reynolds number flow (Re sub b = 2400 x 10 3) fully turbulent flow (Re sub = 48000 x 10 4). The former regime displayed self-sustained flow oscillations but, in the latter regime, organized oscillations were not observed. The investigated geometries did not change neither the Strouhal number nor the flow structure immediately after the cavity. (Author)

Descriptors :   *LASER VELOCIMETERS, *TURBULENT FLOW, DOPPLER EFFECT, CAVITIES, REYNOLDS NUMBER, STROUHAL NUMBER, OSCILLATION, PORTUGAL.

Subject Categories : Fluid Mechanics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE