Turbulence produced by injection of heated jets

Karol Waichman; James P. Moran; E. C. Gozewski

doi:10.1117/12.18355

1 May 1990 Turbulence produced by injection of heated jets

Karol Waichman, James P. Moran, E. C. Gozewski

Proceedings Volume 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere; (1990) https://doi.org/10.1117/12.18355
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

An experimental study of velocity and thermal turbulence generation is presented. These studies are directed to simple and compact laboratory simulation of atmospheric turbulence. The velocity and temperature turbulence was produced by injection of heated air into a main uniform flow of air. The turbulence velocity and temperature flow field was mapped and the one dimensional energy spectra and integral scales were measured. Homogeneous and isotropic turbulence with 18.5 percent streamwise velocity fluctuation intensity was achieved 8 mesh sizes downstream of the injector. At this location the turbulence was homogeneous within 5 percent and the ratio between the longitudinal and the perpendicular fluctuation components was 1.26. The average integral scale of the streamwise velocity turbulence was 18 mm, 0.18 units of mesh size, and the ratio between the velocity and temperature integral scales was 1.04.

Citation Download Citation

Karol Waichman, James P. Moran, and E. C. Gozewski "Turbulence produced by injection of heated jets", Proc. SPIE 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere, (1 May 1990); https://doi.org/10.1117/12.18355

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