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Analysis of free jet turbulence with cross‐correlation light‐in‐flight holography
Author(s) -
Geiger M.,
Herrmann S.,
Peinke J.,
Hinsch K.D.
Publication year - 2002
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/1617-7061(200203)1:1<304::aid-pamm304>3.0.co;2-r
Subject(s) - turbulence , physics , jet (fluid) , laminar flow , holography , optics , vorticity , mechanics , vector field , vortex
The purpose of the work presented here is to analyze the transition of an initially laminar air‐into‐air free jet to turbulence. An holographic PIV system based on light‐in‐flight holography (LiFH) combined with a switched reference beam is used to measure velocity vector fields of a whole volume. The analysis of the velocity fields reveals that the transition to turbulence is marked by a separation of vorticity and shear.