Compact, Pulsed Laser Doppler Anemometer For Airborne And Wind-Tunnel Applications

1983 ◽  
Author(s):  
A. Koneke ◽  
P. G. Sava ◽  
J. P. Hancy
Keyword(s):  
Wind Tunnel ◽  
Pulsed Laser ◽  
Laser Doppler Anemometer ◽  
Laser Doppler

scholarly journals Novel method for the realization of small differential pressures between 1 Pa and 1 kPa

2019 ◽  
Author(s):  
Christian Sander ◽  
Falko Harich ◽  
Martin Förderer ◽  
Eugen Sander
Keyword(s):  
Wind Speed ◽  
Wind Tunnel ◽  
Measurement Uncertainty ◽  
Pressure Difference ◽  
Total Pressure ◽  
Static Pressure ◽  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Air Velocity ◽  
Novel Method

This paper reports a novel method for the realization of small differential pressures in the range of 1 Pa and 1 kPa by using a precision wind tunnel with Laser Doppler Anemometer (LDA) and a Prandtl tube. The LDA system measures the wind speed of the precisely controlled wind tunnel and provides traceability to SI. A Prandtl tube immersed into the wind tunnel, relates the well-controlled airflow speed to the pressure difference of total pressure and static pressure at the point of measurement. Experiments have been performed in the range between 0.5 and 60 m/s air velocity corresponding to about 150 mPa and 2.2 kPa. The measurement uncertainty of the generated differential pressures between 1 Pa and 1 kPa are calculated to be around 0.8% (k = 2).

scholarly journals Approbation of the Laser Doppler Anemometer Lad-08 on the Secondary Standard Test Rig for Air Flow Speed

2020 ◽  
Vol 1675 ◽  
pp. 012082
Author(s):  
I K Kabardin ◽  
V G Meledin ◽  
S V Dvoinishnikov ◽  
V A Pavlov ◽  
G V Bakakin ◽  
...  
Keyword(s):  
Air Flow ◽  
Flow Speed ◽  
Standard Test ◽  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Secondary Standard ◽  
Test Rig

scholarly journals Application features of micro-pixel avalanche photodetectors in the laser Doppler anemometers

2021 ◽  
Vol 2057 (1) ◽  
pp. 012088
Author(s):  
V V Rakhmanov ◽  
S V Dvoynishnikov ◽  
V G Meledin ◽  
V A Pavlov ◽  
D O Semenov
Keyword(s):  
Optical Radiation ◽  
Avalanche Photodiodes ◽  
Laser Doppler Anemometer ◽  
Optical Receiver ◽  
Laser Doppler ◽  
Silicon Photomultiplier ◽  
Optical Signals ◽  
Avalanche Photodetectors ◽  
The Cost ◽  
To Receive

Abstract The optical receiver is an essential part of any laser Doppler anemometer. Traditionally, vacuum photomultiplier tubes are used for reliable reception of weak optical radiation. However, this type of photodetector has its own drawbacks, which lead to a design complication and an increase in the cost of LDA. In this work, the characteristics of silicon micropixel avalanche photodiodes are investigated and the operation of a silicon photomultiplier as a photodetector in an LDA is tested when measuring the velocity on test benches. The possibility of using Si-PMT to receive optical signals of the laser Doppler anemometer is shown.

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