Phase-conjugate holographic system for high-resolution particle image velocimetry through thick-walled curved windows

1995 ◽  
Author(s):  
Donald H. Barnhart ◽  
Ronald J. Adrian ◽  
Carl Menhart ◽  
George C. Papen
Keyword(s):  
Particle Image Velocimetry ◽  
High Resolution ◽  
Particle Image ◽  
Phase Conjugate ◽  
Image Velocimetry

scholarly journals Phase-conjugate holographic system for high-resolution particle-image velocimetry

1994 ◽  
Vol 33 (30) ◽  
pp. 7159 ◽  
Author(s):  
Donald H. Barnhart ◽  
Ronald J. Adrian ◽  
George C. Papen
Keyword(s):  
Particle Image Velocimetry ◽  
High Resolution ◽  
Particle Image ◽  
Phase Conjugate ◽  
Image Velocimetry

scholarly journals Correlation Analysis of High-Resolution Particle Image Velocimetry Data of Screeching Jets

AIAA Journal ◽  
2019 ◽  
Vol 57 (2) ◽  
pp. 735-748 ◽  
Author(s):  
D. J. Tan ◽  
D. Honnery ◽  
A. Kalyan ◽  
V. Gryazev ◽  
S. A. Karabasov ◽  
...  
Keyword(s):  
Particle Image Velocimetry ◽  
High Resolution ◽  
Correlation Analysis ◽  
Particle Image ◽  
Particle Image Velocimetry Data ◽  
Image Velocimetry

High Resolution Particle Image Velocimetry and CH-PLIF Measurements and Analysis of a Shear Layer Stabilized Flame

2015 ◽  
Vol 138 (3) ◽  
Author(s):  
C. W. Foley ◽  
I. Chterev ◽  
J. Seitzman ◽  
T. Lieuwen
Keyword(s):  
Particle Image Velocimetry ◽  
High Resolution ◽  
Shear Layer ◽  
Flow Velocity ◽  
Particle Image ◽  
Flame Stabilization ◽  
Flow Conditions ◽  
Local Flow ◽  
Image Velocimetry ◽  
Flow Velocities

Understanding the mechanisms and physics of flame stabilization and blowoff of premixed flames is critical toward the design of high velocity combustion devices. In the high bulk flow velocity situation typical of practical combustors, the flame anchors in shear layers where the local flow velocities are much lower. Within the shear layer, fluid strain deformation rates are very high and the flame can be subjected to significant stretch levels. The main goal of this work was to characterize the flow and stretch conditions that a premixed flame experiences in a practical combustor geometry and to compare these values to calculated extinction values. High resolution, simultaneous particle image velocimetry (PIV) and planar laser induced fluorescence of CH radicals (CH-PLIF) measurements are used to capture the flame edge and near-field stabilization region. When approaching lean limit extinction conditions, we note characteristic changes in the stretch and flow conditions experienced by the flame. Most notably, the flame becomes less critically stretched when fuel/air ratio is decreased. However, at these lean conditions, the flame is subject to higher mean flow velocities at the edge, suggesting less favorable flow conditions are present at the attachment point of the flame as blowoff is approached. These measurements suggest that blowoff of the flame from the shear layer is not directly stretch extinction induced, but rather the result of an imbalance between the speed of the flame edge and local tangential flow velocity.

Turbulence Measurements by High Resolution Time Series Particle Image Velocimetry

2002 ◽  
Vol 2002 (0) ◽  
pp. 121-122
Author(s):  
Mamoru TANAHASHI ◽  
Yuichi FUKUCHI ◽  
Katsuhiko FUKUZATO ◽  
Toshio MIYAUCHI
Keyword(s):  
Time Series ◽  
Particle Image Velocimetry ◽  
High Resolution ◽  
Particle Image ◽  
Resolution Time ◽  
Turbulence Measurements ◽  
Image Velocimetry

scholarly journals Influence of Stokes number on the velocity and concentration distributions in particle-laden jets

2014 ◽  
Vol 757 ◽  
pp. 432-457 ◽  
Author(s):  
Timothy C. W. Lau ◽  
Graham J. Nathan
Keyword(s):  
Particle Image Velocimetry ◽  
High Resolution ◽  
Particle Concentration ◽  
Particle Image ◽  
Stokes Number ◽  
Exit Plane ◽  
Optical Attenuation ◽  
Image Velocimetry ◽  
Particle Laden Jets

AbstractThe first measurement of the influence of the Stokes number on the distributions of particle concentration and velocity at the exit of a long pipe are reported, together with the subsequent influence on the downstream evolution of these distributions through a particle-laden jet in co-flow. The data were obtained by simultaneous particle image velocimetry (PIV) and planar nephelometry (PN), using four cameras to provide high resolution through the first 30 jet diameters and also correction for optical attenuation. These data provide much more detailed information than is available from previous measurements. From them, a new understanding is obtained of how the Stokes number influences the flow at the jet exit plane and how this influence propagates throughout the jet.

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