Abstract
Aerodynamic forces on motor cycles are important for its stability and fuel economy. In this paper, two motor bikes with and without wind turbine are tested in a subsonic open circuit wind tunnel. The parameters C D , C L and C S are measured for a Reynolds number (Re) range of 5.61x10 4 to 22.44x10 4 and the angle of attack (alpha) between 0 deg to 30 deg. It is found that there is no or little effect in lift and side forces if a wind turbine installed. Using Microsoft Excel, the functional relationship as third degree polynomial between the drag at alpha=0 deg and Reynolds numbers are proposed. The power loss was found using the air density, speed and frontal area with the corresponding drag coefficient. A comparison has been drawn between the power consumption in drag for the two motor cycles. In terms of power losses, installing a wind turbine is suitable up to a speed less than or equal 55 km/h for racing bike and in all ranges in speed for dirt bike.
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More From: International Journal of Renewable Energy Research
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