The laser crossed beam correlation method in its Schlieren mode was used to measure the root mean square value of the fluctuation in density gradient along the flow direction, the integral scale in the transverse direction, convection velocity, and a form of time and length scales in the flow direction in the axisymmetric exhaust plume of a stationary liquid fuel rocket engine. Under certain restrictive assumptions, the root mean square value of the density fluctuation is also inferred. These measurements were made at different radial positions at four different axial stations and are consistent with each other as well as with expectations based on previously published knowledge of axisymmetric turbulent jets.
Measurements of Turbulence Parameters in a Rocket Engine Exhaust Using a Laser Crossed Beam Correlation Technique
1979
26 pages
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English