Coherence concepts in holographic particle image velocimetry

被引：8

作者：

Herrmann, S ^{[1
]}

Hinrichs, H ^{[1
]}

Hinsch, KD ^{[1
]}

Surmann, C ^{[1
]}

机构：

[1] Univ Oldenburg, FB Phys, D-26111 Oldenburg, Germany

来源：

EXPERIMENTS IN FLUIDS | 2000年 / 29卷 / Suppl 1期

关键词：

Particle Image Velocimetry; Wind Tunnel; Velocimetry; Vortex Street; Coherence Concept;

D O I：

10.1007/s003480070013

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A special holographic configuration has been introduced for the sheet-wise reconstruction of sample areas in a particle image field that is reconstructed for particle image velocimetry analysis. A distinct feature is the suppression of light from most of the out-of-focus region of the flow volume. This is realised by light-in-flight holography, where the illuminating laser light of short coherence length allows the discrimination of depth regions by selection of the position of the reconstruction aperture on the hologram. The basic features of the method are outlined, and results are given for flow visualisation in a free nozzle stream and for velocimetry in a wind tunnel vortex street and free nozzle jets. The method is supplemented by electro-optic switching for separate images and cross-correlation evaluation.

引用

页码：S108 / S116

页数：9

共 14 条

[1]

ABRAMSON N, 1996, LIGHT IN FLIGHT HOLO

[2]

[Anonymous], 2000, Particle Image Velocimetry

[3]

[Anonymous], PARTICLE IMAGE VELOC

[4] PHASE-CONJUGATE HOLOGRAPHIC SYSTEM FOR HIGH-RESOLUTION PARTICLE-IMAGE VELOCIMETRY [J].