High-velocity measurements via laser Doppler anemometer using single- and multiaxial-mode lasers

AIAA Journal ◽  
1992 ◽  
Vol 30 (9) ◽  
pp. 2343-2344 ◽  
Author(s):  
J.-A. Wang ◽  
C. L. Dancey
Keyword(s):  
High Velocity ◽  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Velocity Measurements

Laser Doppler anemometer for in-flight velocity measurements on airplane wings

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 680-687
Author(s):  
S. Becker ◽  
F. Durst ◽  
H. Leinhart
Keyword(s):  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Velocity Measurements ◽  
Flight Velocity

Velocity Measurements in Wet Steam Flows by Laser Anemometry and Pitot Tube

1975 ◽  
Vol 97 (1) ◽  
pp. 113-116 ◽  
Author(s):  
R. I. Crane ◽  
A. Melling
Keyword(s):  
Low Pressure ◽  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Pitot Tube ◽  
Alternative Methods ◽  
Wet Steam ◽  
Velocity Measurements ◽  
Laser Anemometry ◽  
Pitot Pressure ◽  
Artificial Seeding

Velocities up to 200 m/s in condensing steam flows have been successfully measured using a laser Doppler anemometer, without artificial seeding. The performance of the system is described and results are compared with simultaneous pitot tube measurements. The discrepancy between the alternative methods used here for converting pitot pressure to velocity in subsonic wet flow becomes greater at higher speeds; extension of this work is discussed, with the objective of calibrating pitot tubes for use at high subsonic and low supersonic speeds encountered in low pressure turbines.

Laser Doppler Anemometer for In-Flight Velocity Measurements on Airplane Wings

AIAA Journal ◽  
10.2514/2.795 ◽  
1999 ◽  
Vol 37 (6) ◽  
pp. 680-687 ◽  
Author(s):  
S. Becker ◽  
F. Durst ◽  
H. Lienhart
Keyword(s):  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Velocity Measurements ◽  
Flight Velocity

scholarly journals Comparison of velocity measurements by high temperature anemometer and laser-doppler anemometer with results of CFD-simulation

2002 ◽  
Vol 6 (1) ◽  
pp. 3-13 ◽  
Author(s):  
M. Zimmel ◽  
J. Rath ◽  
G. Staudinger ◽  
B. Simpson ◽  
M. Brown ◽  
...  
Keyword(s):  
Cfd Simulation ◽  
Low Cost ◽  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Gas Velocity ◽  
Velocity Measurements ◽  
Test Rig ◽  
Blended Coal ◽  
Measurement Results ◽  
Lda Measurement

In the present work, results of gas velocity measurements with a newly developed vane anemometer (HTA - High Tem per a ture Anemometer) are compared with re sults of measurements obtained from Laser-Doppler Anemometer (LDA). The measurements were carried out at the combustion test rig of ALSTOM Combustion Services Ltd. in Derby/UK, and demonstrate the usability and accuracy of the HTA under severe conditions. The test rig was provided with a triple register low NOx coal burner firing pulverised Colombian blended coal at a constant thermal load of 30 MW. Although the environment was both very hot (up to 1350 ?C) and dust laden, the vane anemometer worked with an accuracy comparable to the reference LDA measurement. Since the anemometer represents a relatively simple to use and low cost option compared with LDA, it is seen as aviable alternative for gas velocity measurements in difficult environments. The measurement results are also demonstrated to compare favourably with the results from CFD calculations of the flow in the combustion chamber of the test rig.

Observations of Flame Behavior in a Laboratory-Scale Premixed Natural Gas/Air Gas Turbine Combustor From Planar Laser Induced Fluorescence Measurements of OH, Laser Doppler Anemometer Velocity Measurements, and Coherent Anti-Stokes Roman Spectrometer Temperature Measurements

2004 ◽  
Vol 127 (4) ◽  
pp. 724-739 ◽  
Author(s):  
Paul O. Hedman ◽  
Thomas H. Fletcher ◽  
Daniel V. Flores ◽  
Stewart G. Graham ◽  
Jason K. Haslam ◽  
...  
Keyword(s):  
Natural Gas ◽  
Laser Induced Fluorescence ◽  
Laser Doppler Anemometer ◽  
Laboratory Scale ◽  
Laser Doppler ◽  
Temperature Measurements ◽  
Velocity Measurements ◽  
Planar Laser Induced Fluorescence ◽  
Planar Laser ◽  
Anti Stokes

Instantaneous planar laser induced fluorescence (PLIF) images of OH, simultaneous axial/radial and axial/tangential velocity measurements with an LDA (laser Doppler anemometer), and instantaneous gas temperature measurements using a coherent anti-Stokes Raman spectrometer (CARS) were obtained in a pre-mixed, swirl-stabilized laboratory-scale combustor, fired with natural gas. Four operating conditions were examined (two swirl conditions and equivalence ratios of 0.80 and 0.65). The instantaneous PLIF images of OH illustrate the chaotic nature of the turbulent flame eddies. Mean and standard deviations of each variable were measured at different locations in the flame, along with probability density functions. Stability of the flame at each condition is related to measurements in the central and side recirculation zones.

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