Accession Number : ADA307141

Title :   Unsteady Flow Over a 6:1 Prolate Spheroid.

Descriptive Note : Technical rept. May 92-May 96,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG

Personal Author(s) : Wetzel, Todd G. ; Simpson, Roger L.

PDF Url : ADA307141

Report Date : APR 1996

Pagination or Media Count : 525

Abstract : The flow over a 6:1 prolate spheroid undergoing time dependent maneuvers is studied. The model is mounted on the Dynamic Plunge-Pitch-Roll (DyPPiR) model mount in the Virginia Tech Stability Wind Tunnel. he model undergoes 3O pitchup ramps in O.33s and a 13.50 submarine maneuver in O.25s. All tests are done at a Reynolds number of 4.2 million. Unsteady surface pressures, skid friction, and force and moment measurements are documented for these two maneuvers. In particular, time dependent separation locations are documented for the first time.

Descriptors :   *AERODYNAMIC FORCES, *UNSTEADY FLOW, *FLOW SEPARATION, *THREE DIMENSIONAL FLOW, HEAT TRANSFER, PRESSURE GRADIENTS, MATHEMATICAL MODELS, UNCERTAINTY, PITCH(MOTION), TIME DEPENDENCE, PRESSURE TRANSDUCERS, BOUNDARY LAYER, MOMENTS, COMPUTATIONAL FLUID DYNAMICS, ANGLE OF ATTACK, FLOW VISUALIZATION, PRESSURE MEASUREMENT, FLOW FIELDS, DATA REDUCTION, WIND TUNNEL TESTS, CALIBRATION, FLIGHT MANEUVERS, LAMINAR FLOW, PRESSURE DISTRIBUTION, REYNOLDS NUMBER, FREQUENCY RESPONSE, SKIN FRICTION, HOT WIRE ANEMOMETERS, LASER VELOCIMETERS, STEADY FLOW, CROSS FLOW, BODIES OF REVOLUTION.

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE