GENERATING HIGH FREESTREAM TURBULENCE LEVELS

This paper presents a method of generating a highly turbulent freestre am flow, up to levels of 20% with a relatively uniform mean velocity f ield. This method was developed as a result of a combined water channe l and wind tunnel study. The method for generating these high turbulen ce levels includes using high-velocity jets issuing into a mainstream cross-flow. A range of turbulence levels can be generated, using this same flow geometry, by adjusting the jet-to-mainstream velocity ratio or the Reynolds number of the flow.