低速横移動下の船体に働く流体力に関する研究-II : 非粘性流法を用いた浅水域付加質量の計算

概要

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The ship speed near the berth is very low and the fluid flow around a ship hull is unsteady. In the previous paper using 2-D CFD, it has been demonstrated that the added mass force can be estimated by potential flow code. In this paper, the potential code is used to estimate the added mass force for 3-D ship hull in shallow water. In some papers, the results by inviscid code have been reported. However, the series computation for various ship shapes has not been presented. The surface and field point pressure distribution which are useful information for 3-D CFD are not shown in those papers. So, in the present study, the potential flow theory is used to calculate the added mass coefficients in the deep water and shallow water cases for ESSO OSAKA, Series 60 and SR 196 model. The calculation results of the added mass coefficients are compared with well-known Motora Chart and some experimental results. After some series computation, the simple equation for predicting the added mass force in shallow water is presented. The equation is composed by the combination of principal dimensions and the water depth; d/B, C_b, d/H. The predicted results show good agreement with the experimental results and computational results.
社団法人日本航海学会の論文
2000-03-25