Holographic particle velocimetry: a 3D measurement technique for vortex interactions, coherent structures and turbulence

来自 dx.doi.org

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103

作者：

M Hui，F Hussain

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摘要：

To understand the topology and dynamics of coherent structures (CS), the interactions of CS with fine-scale turbulence, and the effects of CS on entrainment, mixing and combustion, experimental tools are needed that can measure velocity (preferably vorticity) vector fields in both 3D space and time. While traditional measurement techniques are not able to serve this purpose, holographic particle velocimetry (HPV) appears to be promising. In a demonstration experiment, the instantaneous 3D velocity vector fields in some simple vortical flows have been obtained using the HPV technique. In this preliminary report, the principles of the HPV technique are illustrated and the key issues in its implementation are discussed.

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关键词：

Experimental/ combustion flow measurement holography mixing stratified flow turbulence velocity measurement vortices/ 3D measurement technique vortex interactions coherent structures turbulence topology dynamics entrainment mixing combustion holographic particle velocimetry instantaneous 3D velocity vector fields/ A4780 Measurement instrumentation and techniques for fluid dynamics A4730 Rotational flow, vortices, buoyancy and other flows involving body forces A4725 Turbulent flows, convection, and heat transfer A4755H Stratified flows A4240K Holographic interferometry other holographic techniques