NASA Technical Reports Server (NTRS) : Turbulence pdf

NASA Technical Reports Server (NTRS) : Turbulence

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Description of the Book:

A series of wind tunnel investigations were conducted to determine the flow characteristics downstream of a set of wind tunnel inlet flow conditioning vanes. The purpose was to develop an understanding of the flow mechanisms that contributed to the pressure loss and turbulence generated by the vane set. The near-field characteristics and flow field development were investigated with a 1/3 scale two dimensional model of the vane set at near full-scale Reynolds numbers. In a second series of tests, the global flow field characteristics were investigated by means of a 1/15 scale model of the full vane set and the 5:1 contraction leading to the model’s test section. Scale effects due to Reynolds number mismatch were identified and their significance noted and accounted for when possible. Scaling parameters were adopted that allowed predictions to be made of the expected turbulence and pressure distributions in the full-scale wind tunnel test section, based on the small-scale test results.

The predictions were found to be in good agreement with actual measurements made in the full-scale facility

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 10/1/1990
• Year: 1990
• Book Topics/Themes: NASA Technical Reports Server (NTRS), FLOW CHARACTERISTICS, FLOW DISTRIBUTION, INLET FLOW, TURBULENCE, VANES, WIND TUNNEL APPARATUS, WIND TUNNELS, FULL SCALE TESTS, REYNOLDS NUMBER, SCALE EFFECT, SCALE MODELS, TWO DIMENSIONAL MODELS, WIND TUNNEL TESTS, Dudley, Michael R

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