The transverse dynamics of a towed cable was studied both experimentally and analytically. Forced oscillation was applied on the upstream end of a cable towed in its longitudinal direction, while transverse motion in the downstream end was restricted by springs. Reynolds numbers based on length were in the 6.5 − 32.5 × 106 range and cable length to diameter ratio was 1180. The amplitude of the forced motion was 4.55 diameters. The transverse response was measured at two locations and compared to results from computer simulation, showing that the model known as the Paidoussis equation overpredicted the response by a factor of two around resonance. Modification of force coefficients with respect to a modified KC number improved the results, but important trends were not captured. Curve fitting the cross flow drag coefficient to experimental data gave a result 3.3 times the drag coefficient past a cylinder in supercritical flow. The discrepancies are believed to be caused by forward speed effect on the formation of vortices and the transient behavior of the wake, but the physics of this is not clear.

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