1997-05-19

Performance Measurements and Detailed Flow Field Observations for a Light Truck Cooling Fan 971794

Cooling fan performance: pressure rise, flow rate, shaft power have been acquired. The control variables for these measurements include the fan rprn and the relative immersion of the fan into the shroud. In addition tuft visualizations and hot-wire anemometry have been used to visualize and measure the velocity field in the wake of the fan. The velocity measurements have been processed to provide phase averaged mean and RMS fluctuation levels. The mean values have been differentiated to provide the phase averaged streamwise vorticity magnitudes. The data are used to gain an understanding of the fluid mechanical attributes of the flow field, as well as to provide experimental results for comparison with computational investigations.

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