单体高速船截流板减阻的浅水特性分析

Analysis of drag reduction characteristics of a high-speed monohull ship interceptor in shallow water

[目的]为探究水深对截流板减阻效果及最佳减阻高度的影响,基于RANS方程组数值求解的方法,对加装不同高度截流板的单体高速船进行深浅水绕流场数值模拟。[方法]首先,以DTMB 5415光体高速船为研究对象进行数值方法的有效性验证与不确定度分析;然后,对不同截流板高度与水深工况下的某高速单体船进行绕流场数值模拟;最后,基于数值结果分析不同工况的阻力、航态及流场特性。[结果]研究表明,截流板的减阻效果存在明显的浅水效应;最佳减阻高度随水深变化基本不变,截流板对纵倾角度的降低也基本不随水深的变化而改变;截流板有一定降低船后兴波的作用,但随着水深的减小,该作用效果会减弱。[结论]所做研究对截流板在浅水中的应用具有一定的参考价值。

[Objectives]This study seeks to explore the influence of water depth on the drag reduction effect and optimal drag reduction height of an interceptor.Based on the numerical solution approach of the RANS equations,the flow field around a high-speed monohull ship with various height interceptors is numerically simulated.[Methods]First,the validity of the numerical method is verified by a DTMB 5415 highspeed ship.Next,the flow field around a high-speed monohull ship is numerically simulated under different interceptor heights and water depths.Based on the numerical results,the resistance,navigation state and flow field characteristics under different working conditions are analyzed.[Results]The results show that the drag reduction effect of the interceptor has an obvious shallow water effect.The optimal drag reduction height and reduction of trim angle of the interceptor is unchanged with the change in water depth.The interceptor has a certain effect on reducing wave-making behind the ship,but the effect decreases with the decrease in water depth.[Conclusions]This study has certain practical reference value for the application of interceptors in shallow water.