Abstract
A novel scheme of introducing flow into an electric discharge laser (EDL) cavity has been developed and is described here. The flow, which is generated by a grid of parallel porous tubes, has beet studied experimentally and theoretically. Detailed measurements of the flow field structure using hot-wire anemometry have been carried out and some turbulence data obtained near the porous tubes. A theoretical model based on rotational inviscid flow near the porous tubes is developed. The vorticity distribution is chosen to satisfy both the mass flux and no slip conditions on the tube walls. The near field flow exhibits a wake downstream of the tubes. A vorticity diffusion model is introduced to render the flow uniform in the far field. Agreement is shown between experiment and theory.
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