Publication Detail

Flow Tests on Cables with Fuzz Fairing

4 pp.
MITSG 89-31J
$1 DOM

Experimental comparisons were made of the effect of fuzz fairing on the hydrodynamic characteristics of an electro-mechanical tow cable. The tests were done in the David Taylor Research Center circulating water channel. In addition to bare and plain jacketed cables, three different fairing stiffnesses were evaluated, each at three different fairing lengths. Lift, drag and vibration data were taken at nominal angles of attack of 23, 45 and 90 degrees and at speeds from 1.0 to 5.0 knots. Test results are presented in the form of lift and drag coefficients and also as normal and tangential force coefficients. Faired cables exhibited far less vibration than the unfaired cables, though the fairing stiffness affected the amount of this reduction and the flow speeds at which vibration would reestablish. The effect of the fairing on both the normal and tangential force components was dependent on the stiffness and length of the fairing material. Because of the varying geometry of the faired cable cross-sections due to angle of attack and speed changes, the force coefficients were found to be non-constant. Reprinted from Proceedings from Oceans '89, Seattle, Wash., September 18-21, 1989.