散货船纵倾阻力研究

船舶在航运过程中为了节能减排并获得最大的经济效益，往往希望以同样的速度、同样的排水量行驶时能有更小的阻力，通过调节船舶纵倾角度来改变船舶的航态，进而减少船舶阻力是一种简单有效的方法。以180000 DWT 散货船在设计吃水设计航速平浮航态为基础，对船舶分别进行不同角度的首倾和尾倾的调节，在Fluent中用k-ε和k-ω两种湍流模型分别求解RANS方程组，计算出不同倾角下船舶阻力值。并通过相同工况下模型试验来验证计算结果，得出针对本180000 DWT散货船而言，通过改变船舶纵倾角可以减少船舶阻力的结论。

The effect of trim adjustment on bulk freighter resistance

During the opratation of shipping, in order to achieve energy-saving emission reduction and the maximum economic benefits, people often hope that under the same loading and the same speeds, the ship could cosume less oil. Ad-justing the ship trim angle to reduce the sailing state of ship is a good method simple and effective. Based on the 180 000 DWT bulk carrier at design draft as well as design speed on flat floating state, we adjust the ship pitch and stern, and through the fluent numerical simulation and model experiment to study the different trim effects on ship resistance. Using k-εand k-ωtwo turbulence models to solving RANS equation in fluent, calculating the resistance and the increase or reduction rate, to-gether with the experiment date and join the conclusion .