Investigation of ship waves in a narrow channel |
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Authors: | Khanh Toan Dam Katsutoshi Tanimoto Eldina Fatimah |
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Institution: | (1) INA Corporation, Tokyo, Japan;(2) Present address: WorleyParsons, Level 11, 141 Walker St, PO Box 1812, North Sydney, NSW, 2059, Australia;(3) Saitama University, 225 Shimo-okubo, Saitama Saitama, 338-8570, Japan;(4) COEI, Universiti Teknologi Malaysia, JL, Semarak Kuala Lumpur, 54000, Malaysia |
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Abstract: | This paper presents a discussion of the characteristics of ship waves in a narrow channel restricted by vertical walls, based
on observed data and the results computed by a 2-D model. In the numerical model, the propagation of waves generated by a
moving ship is simulated by solving 2-D depth-integrated Boussinesq equations. To get the boundary conditions at the location
of the ship, the slender-ship approximation is employed. A field observation was carried out at a straight length of navigation
channel. The ships targeted in the observations are two kinds of waterbuses with lengths of 28 and 24 m. The relative depth
Froude number for the river current, an appropriate parameter for assessing the influence of the current on ship wave characteristics
in a navigation channel, ranged from 0.47 to 0.76. The observed maximum wave height varied between 0.13 and 1.26 m. The maximum
wave height of the wave train is sharply increased when the relative depth Froude number exceeds 0.6. The results computed
by the present model agree fairly well with the observed data. |
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Keywords: | Relative depth Froude number Field observation Maximum wave height Numerical simulation River current Sailing distance |
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