Velocity and turbulence measurements in the shock region using the two component laser Doppler anemometer

1987 ◽  
Author(s):  
V. Krishnan ◽  
K. A. Bütefisch ◽  
K.-H. Sauerland
Keyword(s):  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Turbulence Measurements ◽  
Shock Region ◽  
Two Component

Measurements in Vertical Plane Turbulent Plumes

1989 ◽  
Vol 111 (1) ◽  
pp. 69-77 ◽  
Author(s):  
B. R. Ramaprian ◽  
M. S. Chandrasekhara
Keyword(s):  
Eddy Viscosity ◽  
Cold Water ◽  
Vertical Plane ◽  
Laser Doppler Anemometer ◽  
Hot Water ◽  
Mean Flow ◽  
Resistance Thermometer ◽  
Flow Measurements ◽  
Turbulence Measurements ◽  
Two Component

Mean-flow and turbulence measurements have been obtained in two-dimensional vertical turbulent plumes in a nominally still ambient. The plumes were generated by injecting hot water vertically upwards from the bottom of a reservior containing cold water. A two-component Laser Doppler Anemometer (LDA) and a “cold-film” resistance thermometer were used to obtain instantaneous velocity and temperature measurements in the plume. The present mean-flow measurements have confirmed many of the earlier measurements on plane plumes, but have also indicated some important differences. The use of the two-component LDA made it possible to obtain data on turbulent intensities, turbulent fluxes and other details of the structure of turbulence in plane plumes. The turbulence measurements have shown that the eddy viscosity and turbulence are significantly higher in the plume compared to an isothermal jet. Detailed measurements of energy balance suggest that buoyant production contributes substantially to this increase.

Simple directionally sensitive two-component laser Doppler anemometer

1980 ◽  
Vol 19 (8) ◽  
pp. 1221 ◽  
Author(s):  
O. J. Deters ◽  
M. H. Friedman
Keyword(s):  
Laser Doppler Anemometer ◽  
Laser Doppler ◽  
Two Component
Sign in / Sign up

Export Citation Format

Share Document