Accession Number : ADA320925

Title :   Fluid Dynamics of Unsteady Cavity Flow.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN INST FOR ADVANCED TECHNOLOGY

Personal Author(s) : Engblom, W. A. ; Goldstein, D.

PDF Url : ADA320925

Report Date : NOV 1996

Pagination or Media Count : 64

Abstract : Unsteady, hypersonic flow over the nose of a blunt body with a forward-facing cavity is studied. A parameter study is conducted using a commercial finite-volume computer code to study the mechanisms of resonance. Numerical simulation results are often directly compared to recent experiments. Resonant pressure oscillations within the cavity occur for relatively shallow cavities provided freestream noise is present. However, deeper cavities self-sustain strong resonance. A spring-mass-damper model is described which emulates noise-driven, relatively shallow cavity acoustic behavior.

Descriptors :   *HYPERSONIC FLOW, *CAVITATION, COMPUTERIZED SIMULATION, WHITE NOISE, COMPUTATIONAL FLUID DYNAMICS, HYDRODYNAMIC CODES, MACH NUMBER, UNSTEADY FLOW, FLOW NOISE, HYPERSONIC CHARACTERISTICS, AEROTHERMODYNAMICS, FREE STREAM, VISCOUS FLOW, PRESSURE DISTRIBUTION, VARIABLE PRESSURE, ACOUSTIC RESONANCE, HYPERVELOCITY PROJECTILES.

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE