Accession Number : ADA191191

Title :   Noncondensing Round Turbulent Gas Jets in Liquids.

Descriptive Note : Interim rept. 1 Aug 85-30 Sep 87,

Corporate Author : MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Loth, E ; Faeth, G M

PDF Url : ADA191191

Report Date : Oct 1987

Pagination or Media Count : 69

Abstract : The structure and mixing properties of noncondensing round turbulent air jets in still water was investigated experimentally, considering both subsonic and sonic underexpanded (with underexpanded ratios up to 8:1) jet exit conditions. Measurements included flow visualization, using flash and high-speed motion-picture photography; mean void fraction distributions, using deconvoluted gamma-ray absorption measurements; mean entrainment velocities, using laser-Doppler anemometry; and mean static pressures along the axis, using a static pressure probe. Analysis was also undertaken to help interpret the measurements, based on the locally-homogeneous-flow approximation (relative velocity differences between the phases neglected) and an effective-adapted-jet approximation for treating the mixing properties of the underexpanded jets. Keywords: Multiphase flow, Gas jets, Liquids, Compressible turbulent jets.

Descriptors :   *JET FLOW, *TWO PHASE FLOW, COMPRESSIBLE FLOW, ENTRAINMENT, FLOW VISUALIZATION, GASES, HIGH SPEED PHOTOGRAPHY, MEAN, MIXING, MOTION PICTURES, MULTIPHASE FLOW, PROBES, STATIC PRESSURE, TURBULENT FLOW, VELOCITY, WATER, LASER VELOCIMETERS, DOPPLER EFFECT, GAMMA RAY ABSORPTION COEFFICIENTS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE