A two-component laser-Doppler anemometer using a single Fabry-Perot interferometer

1975 ◽  
Vol 8 (4) ◽  
pp. L45-L47 ◽  
Author(s):  
P L Eggins ◽  
D A Jackson
Keyword(s):  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Fabry Perot ◽  
Two Component

Simple directionally sensitive two-component laser Doppler anemometer

1980 ◽  
Vol 19 (8) ◽  
pp. 1221 ◽  
Author(s):  
O. J. Deters ◽  
M. H. Friedman
Keyword(s):  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Two Component

Laser-Doppler Measurements of Velocities Just Downstream of a Collapsible Tube During Flow-Induced Oscillations

2001 ◽  
Vol 123 (5) ◽  
pp. 493-499 ◽  
Author(s):  
C. D. Bertram ◽  
G. Diaz de Tuesta ◽  
A. H. Nugent
Keyword(s):  
Cross Section ◽  
Fiber Optic ◽  
Reverse Flow ◽  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Axial Component ◽  
Collapsible Tube ◽  
Two Component ◽  
Flow Through ◽  
The Cross

The flow field less than one diameter downstream of the end of a collapsible tube executing self-excited oscillations was examined using a two-component fiber-optic laser-Doppler anemometer. The time-averaged Reynolds number of the flow was 11,000. With the tube oscillating periodically, results obtained during many cycles of oscillation were combined to yield surface plots of the axial component over the cross section at 16 phases of the cycle. By combining measurements obtained with the laser probe in two different orientations, secondary flow vectors over the cross section were likewise constructed for 16 phases. The measurements showed strongly phasic turbulence intensity, with the phase of high intensity coinciding with the time of maximal tube collapse. Reverse flow occurred during much of the cycle, at places in the cross section that agree with our previous observations of laminar and turbulent steady flow through a rigid simulated collapsed tube.

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