Ultrahigh-sensitivity self-mixing laser Doppler velocimetry with laser-diode-pumped microchip LiNdP/sub 4/O/sub 12/ lasers

1999 ◽  
Vol 11 (6) ◽  
pp. 706-708 ◽  
Author(s):  
R. Kawai ◽  
Y. Asakawa ◽  
K. Otsuka
Keyword(s):  
Laser Diode ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Diode Pumped ◽  
Ultrahigh Sensitivity

Multipoint Sensing Laser Doppler Velocimetry Based on Laser Diode Frequency Modulation

1996 ◽  
Author(s):  
Satoru Kato ◽  
Tadashi Ichikawa ◽  
Hiroshi Ito ◽  
Morihiro Matsuda ◽  
Nobuaki Takahashi
Keyword(s):  
Laser Diode ◽  
Frequency Modulation ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry

Optical fibre laser Doppler velocimetry based on laser diode frequency modulation

1995 ◽  
Vol 27 (4) ◽  
pp. xii
Author(s):  
Satoru Kato ◽  
Manabu Kagami ◽  
Ta-i Ichikawa ◽  
Kazuo Hasegawa ◽  
Hiroshi Ito
Keyword(s):  
Optical Fibre ◽  
Laser Diode ◽  
Frequency Modulation ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Fibre Laser ◽  
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

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.

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