Hydrodynamic Forces on Oscillating and Nonoscillating Smooth Circular Cylinders in Crossflow.

摘要

A 12-in-diameter, 6-ft-long cylinder was towed horizontally 4ft beneath the water surface and perpendicular to the flow. The cylinder was towed at a constant velocity under the following conditions: nonoscillating,oscillating in heave,oscillating in pitch (around the axis of the cylinder),and simultaneously oscillating in pitch and heave. Experimental data on lift,drag,and moment were obtained for Reynolds number from about 100,000to above 1million. The results show that the oscillations can significantly influence the magnitude of the lift,drag,and moments. (Author)