以49.5 m金枪鱼延绳钓渔船为研究对象，为了得到具有较好阻力性能的球鼻艏，首先设计撞角型球鼻艏，通过CFD方法得到撞角型球鼻艏渔船的阻力性能并与模型试验结果进行比较，两者吻合较好；然后通过改变球艏的伸出长度、形心浸深和体积为该船设计水滴型和S-V上翘型球鼻艏，对水滴型和S-V上翘型球鼻艏形式的船体阻力性能进行数值模拟。通过比较三种不同球鼻艏形式下船体的阻力性能，结果显示：该型延绳钓渔船使用撞角型球鼻艏具有较好的减阻效果。%The resistance performance of bulbous bow is studied for a 49.5m tuna longline ifshing boat. A embolon type bulbous bow is ifrstly designed and simulated by CFD for the resistance performance. The numerical results are in good agreement with the experimental results. Then, a water-drop type bulbous bow and S-V type bulbous bows are designed with variation of the extending length, the centroid depth and the volume of the bulbous bows. The resistance of the bulbous bows with three different types are numerically simulated and compared, respectively. The results show that the resistance of the longline ifshing vessels will be reduced with embolon type bulbous bow.
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