ABSTRACT

Because of the "middle obstruction" of the Yangtze River, the construction of artificial waterways in the middle reaches of the Yangtze River has been put on the agenda. At present, the Yangtze River ships are in a large-scale development trend. For 10,000-ton ships, the Yangtze River artificial waterway is restricted water with small section coefficients. In this paper, the low-speed full and 10,000-ton ship is taken as the research object. Select the ship resistance and the vertical suction force of ship during navigation as the research indexes. The experiment simulates the inclined bank channel with a slope ratio of 1:3, subsequently, by varying ship speeds, ship-to-shore distances and channel water depths, analyzing the impact of channel and ship speed on 10,000-ton ships. Using CFD to calculate the model experiment conditions, the CFD calculation results are in good agreement with the model experiment results, and change the scale ratio to obtain the ship resistance and ship vertical suction force of different scale-ratio models by CFD. Obtain the influence law of the scale ratio on the ship's resistance and the vertical suction force of the ship, which has guiding significance for navigation performance of ships in restricted waters and the large-scale development of ships in the restricted waters in the future.

INTRODUCTION

The region along the Yangtze River plays a vital role in China's economic development. With the development of large-scale ships, the Yangtze River's freight volume has gradually reached the bottleneck, and new waterways need to be built to meet the needs of economic development. The proposed artificial waterway adopts inclined bank wall, and the water surface width and water depth have certain limits. At present, the Yangtze River ships are in a large-scale development trend. For 10,000-ton ships, the Yangtze River artificial waterway is restricted water with small section coefficients. The navigation state of 10,000-ton ships sailing in it is different from that in infinite waters; ship will have subsidence and the return speed. When the ship is sailing in the restricted channel, the pressure and speed distribution of the ship's flow field are uneven, resulting in a large difference in the ship's resistance and navigational state from sailing in infinite waters, the impact of artificial waterways on the navigation of large ships cannot be ignored. In order to ensure the safety of navigation of ships, many scholars have carried out many theoretical studies and experimental studies on the ship sinking and ship resistance in shallow and restricted water.

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