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Title: Velocities induced by commercial navigation
Authors: United States. Army. Corps of Engineers. Louisville District
Maynord, Stephen T.
Keywords: Navigation effects
Propeller jets
Navigation models
Return velocity
Turbidity currents
Ship propulsion
Navigation channels
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; HL-90-15.
Description: Technical Report
Abstract: Studies were conducted to determine the velocities induced by commercial navigation on large inland waterways. The velocity-inducing mechanisms addressed in this study include the propeller jet and the displacement effects of the vessel. Using flow visualization and model and prototype measurements, a better understanding of flow patterns near a moving vessel was obtained. Results show that the propeller jet is not the only mechanism producing significant velocities at the channel bottom. The displacement effects of the vessel also create significant bottom velocities. While return velocities have long been recognized as an effect of the vessel displacement, this study shows that the displacement effects induce a velocity beneath the tow that is generally larger than the return velocity and is not influenced by channel size except for relatively low blockage ratios. Predictive relations were developed for return velocities, propeller jet velocities, and displacement velocities.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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