Hypersonic flow past open cavitiesThe hypersonic flow over a cavity is investigated. The time-dependent compressible Navier-Stokes equations, in terms of mass averaged variables, are numerically solved. An implicit algorithm, with a subiteration procedure to recover time-accuracy, is used to perform the time-accurate computations. The objective of the study is to investigate the effects of Reynolds number and cavity dimensions. The comparison of the computations with available experimental data, in terms of time mean static pressure, heat transfer, and Mach number show good agreement. In the computations large vortex structures, which adversely affect the cavity flow characteristics, are observed at the rear of the cavity. A self-sustained oscillatory motion occurs within the cavity over a range of Reynolds number and cavity dimensions. The frequency spectra of the oscillations show good agreement with a modified semi-empirical relation.
Document ID
19930064166
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Morgenstern, Alagacyr, Jr. (NASA Headquarters Washington, DC United States)
Chokani, Ndaona (North Carolina State Univ. Raleigh, United States)