Aerodynamic Performance Analysis of Cool-ing Fans in Two Wind Tunnels
When a multi-nozzle wind chamber is set up at the outlet of an automotive cooling fan to test the aerodynamic performance of the product,the test data of the wind tunnel cannot distinguish between the total efficiency and the static efficiency of the fan after computational processing.To compare with the results of the free-outlet wind tunnel test in the fan industry,CFD method is used to study the aerodynamic performance of cooling fans in two types of wind tunnels,free inlet with chamber outlet and chamber inlet with free outlet.The numeri-cal simulation results show that,when the flow rates are similar,the torque suffered by the cooling fan in the two wind tunnels is basically the same,but the efficiency of the fan motor shaft is different.
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