Acoustic velocity measurements in the air by means of Laser Doppler Velocimetry: Cramér-Rao Bounds and Maximum Likelihood Estimation

2002 ◽  
Author(s):  
Alain Le Duff ◽  
Guy Plantier ◽  
Jean-Christophe Valiere ◽  
Richard Perdriau
Keyword(s):  
Maximum Likelihood ◽  
Maximum Likelihood Estimation ◽  
Laser Doppler Velocimetry ◽  
Likelihood Estimation ◽  
Acoustic Velocity ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Velocity Measurements

Study on Multi-Point Velocity Measurements of Laser Doppler Velocimetry Based on Dual-Core Photonic Crystal Fiber

2015 ◽  
Vol 35 (11) ◽  
pp. 1112003
Author(s):  
黄雪峰 Huang Xuefeng ◽  
赵冠军 Zhao Guanjun ◽  
李盛姬 Li Shengji ◽  
郭枫 Guo Feng ◽  
郑光华 Zheng Guanghua ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Velocity Measurements ◽  
Crystal Fiber ◽  
Point Velocity ◽  
Dual Core

Flow Field Measurements of an Unsteady Reacting Muzzle Exhaust Flow

1983 ◽  
Vol 105 (4) ◽  
pp. 884-888 ◽  
Author(s):  
G. Klingenberg ◽  
H. Mach ◽  
G. Smeets
Keyword(s):  
Flow Field ◽  
Unsteady Flow ◽  
Laser Doppler Velocimetry ◽  
Field Measurements ◽  
Laser Doppler ◽  
Temperature Measurements ◽  
Doppler Velocimetry ◽  
Velocity Measurements ◽  
Lateral Velocity ◽  
Schlieren Photography

The events associated with the discharge of a 20-mm caliber weapon have been examined in detail in order to identify and understand important features of the reacting gun muzzle flow field. The diagnostics applied involves shadowgraph and Schlieren photography, invasive pressure probes, spectroscopy for temperature measurements and Laser-Doppler velocimetry for velocity measurements. Emphasis has been on velocity measurements using two setups to determine both the axial and lateral velocity components throughout the muzzle flow field. The data clearly demonstrate the complexity of the processes involved in the unsteady flow expansion of the gun muzzle exhaust flow.

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