The calibration of a turbine meter as a secondary flow-rate standard by a one-point relative method using laser Doppler velocimetry

1998 ◽  
Vol 9 (1) ◽  
pp. 129-132 ◽  
Author(s):  
J-F March
Keyword(s):  
Secondary Flow ◽  
Flow Rate ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Relative Method

scholarly journals Laser-Doppler Velocimetry Measurements Inside a Backward Curved Centrifugal Fan

2001 ◽  
Vol 7 (3) ◽  
pp. 173-181
Author(s):  
Tong-Miin Liou ◽  
Meng-Yu Chen
Keyword(s):  
Flow Rate ◽  
Turbulence Intensity ◽  
Laser Doppler Velocimetry ◽  
Reverse Flow ◽  
Flow Region ◽  
Design Flow ◽  
Laser Doppler ◽  
Centrifugal Fan ◽  
Doppler Velocimetry ◽  
Flow Rates

Laser-Doppler velocimetry (LDV) measurements are presented of relative mean velocity and turbulence intensity components inside the impeller passage of a centrifugal fan with twelve backward curved blades at design, under-design, and over-design flow rates. Additional LDV measurements were also performed at the volute outlet to examine the uniformity of the outlet flow for the three selected flow rates. Complementary flow visualization results in the tongue region are further presented. It is found that the number of characteristic flow regions and the average turbulence level increase with decreasing air flow rate. For the case of under-design flow rate, there are a through-flow region on the suction side, a reverse flow region on the pressure side, and a shear layer region in between. The corresponding average turbulence intensity is as high as 9.1% of blade tip velocity.

Cryogenic flow rate measurement with a laser Doppler velocimetry standard

2018 ◽  
Vol 29 (3) ◽  
pp. 034009 ◽  
Author(s):  
R Maury ◽  
A Strzelecki ◽  
C Auclercq ◽  
Y Lehot ◽  
S Loubat ◽  
...  
Keyword(s):  
Flow Rate ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Cryogenic Flow

Influence of molecular structure on secondary flow of polyolefin melts as investigated by laser-Doppler velocimetry

2001 ◽  
Vol 40 (4) ◽  
pp. 384-394 ◽  
Author(s):  
Helmut Münstedt ◽  
Martin Schwetz ◽  
Marcus Heindl ◽  
Michael Schmidt
Keyword(s):  
Molecular Structure ◽  
Secondary Flow ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry

scholarly journals Investigation of Internal Flow in Centrifugal Pump Diffuser using Laser Doppler Velocimetry (LDV) and Computational Fluid Dynamics

2021 ◽  
Vol 1909 (1) ◽  
pp. 012075
Author(s):  
Daisuke Sugiyama ◽  
Asuma Ichinose ◽  
Tomoki Takeda ◽  
Kazuyoshi Miyagawa ◽  
Hideyo Negishi ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Centrifugal Pump ◽  
Laser Doppler Velocimetry ◽  
Internal Flow ◽  
Laser Doppler ◽  
Doppler Velocimetry
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