Accession Number : ADP009054

Title :   Laser Doppler Measurements of a Grid-Generated Turbulence Undergoing a Volume Reduction,

Corporate Author : ECOLE CENTRALE DE LYON ECULLY (FRANCE)

Personal Author(s) : Serre, G. ; Le Penven, L.

Report Date : 23 JUL 1992

Pagination or Media Count : 6

Abstract : An homogeneous turbulent flow submitted to a uniform compression is investigated using LDV. The initial turbulent flow which is produced by drawing a grid in a closed cylinder is compressed by means of a piston. Ensemble averaging is used to compute velocity moments. The experimental set-up specially designed for this purpose is described. Preliminary results are given including; compression without initial flow, free decay of grid-generated turbulence and combination of the two phases; generation of turbulence and compression. Finally, results are compared to the predictions of a recent generalisation of the standard Reynolds stress model. (Author)

Descriptors :   *TURBULENT FLOW, *COMPRESSION, DISSIPATION, GRIDS, COMPUTATIONAL FLUID DYNAMICS, LASER VELOCIMETERS, EXPERIMENTAL DATA, FRANCE, COMBUSTION, VISCOSITY, KINEMATICS, SHEAR STRESSES, INVISCID FLOW, ENERGY TRANSFER, AXIAL FLOW.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE