商船艉楼式旋筒风帆数值模拟

Numerical Simulation on Flettner Rotors Mounted on Merchant Ship Afterastle

设计一款嵌在船舶艉楼上的旋筒风帆,实现船舶对风能的有效利用。为研究风速和风帆转速对风帆助推效果的影响,利用FLUENT软件开展数值仿真计算,得到风帆在不同风速和不同速度比下的升力系数、阻力系数和推力等。结果表明:在同一速度比下,风速越大,风帆产生的推力越大;当速度比为2.0时,风帆在不同风速下均能产生较大的推力;在8级风、速度比为2.0时,风帆的最大推力超过750 kN,且迎风航行时还能减小船舶艉楼的风阻。

A new type of ship after castle and flettner rotor installed on the after castle is designed to realize the effective utilization of wind energy.In order to study the influence of wind speed and rotor angular speed on rotor thrust contribution,the FLUENT software is used to carry out numerical simulation calculation,and the lift coefficient,drag coefficient and thrust coefficient of the rotor under different wind speed and different spin ratio are obtained.The results show that under the same spin ratio,the larger the wind speed is,the greater the thrust will be generated by the flettner rotor.When the spin ratio is 2.0,the flettner rotor can generate larger thrust under different wind speed.The maximum thrust exceeds 750 kN at the 8 level of the wind and spin ratio of 2.0,and the resistance of ship after castle can be reduced when the wind is coming from the stem.