Transverse forces on rough cylinders in harmonic flow
Henning, Peter John
MetadataShow full item record
The transverse forces acting on smooth and sand-roughened circular cylinders immersed in an harmonically oscillating flow have been measured using a recently constructed U-shaped water tunnel. The lift coefficients were found to depend on Keulegan-Carpenter number but independent of the Reynolds number within the range of relative roughness and Reynolds numbers tested. The results have shown that the lift coefficients for smooth cylinders at low Reynolds numbers are nearly identical with those obtained for rough cylinders at very high Reynolds numbers at the corresponding amplitude ratios. The results have also shown that the transverse force is a significant fraction of he in-line force and must be taken into consideration in the design of structures.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Collins, Neil Jon (Monterey, California. Naval Postgraduate School, 1976-06);The tranverse forces acting on smoth and san-roughened circular cylinders immersed in an harmonically oscillating flow have been measured using a recently constructed U-shaped water tunnel. The lift coefficient and the ...
Cohen, Steven Robert (Monterey, California. Naval Postgraduate School, 1976-06);Lighthill's theory of aerodynamic sound is reviewed. Applications of this theory to different cylinder classes are synthesized and extended to cylinder types not addressed previously. An experiment wherein cylinders are ...
Hydrodynamic Forces From Combined Wave and Current Flow on Smooth and Rough Circular Cylinders at High Reynolds Numbers Sarpkaya, T.; Bakmis, C.; Storm, M.A. (1984-05);Experiments were conducted with two smooth and two sand-roughened cylinders in a harmonically oscillating flow with current to determine the drag and inertia coefficients and to examine the effect of current-induced ...