470级帆船舵水动力性能研究

发布时间：2018-05-23 20:49

本文选题：470级帆船 + 舵　；参考：《武汉体育学院》2017年硕士论文

【摘要】：舵是帆船运动时调整航向和平衡帆船横移的重要附体,在帆船比赛转向和绕标中必不可少,帆船船体及附体的水动力性能对运动成绩具有关键性影响,本研究基于计算流体力学方法(Computational Fluid Dynamics,CFD),采用雷诺平均纳维尔-斯托克斯方程(Reynolds-averaged Navier-Stokes Equations,RANSE)求解数值方法对470级帆船中单独舵体、单独船体、船舵组合体的粘性流场进行了模拟。研究表明,单独船体和船舵组合体中的船体阻力值与船速成幂次方的关系,随速度的增加,兴波情况越来越复杂。船舵组合系统,在排水量为280kg的吃水深度时,舵的失速角处于30°~35°,舵角在10°~25°时舵体升阻比较高。船舵水动力相互影响发现舵体对船舵系统具有整流减阻作用,改善船体尾流兴波的复杂程度,当船速低于6m/s时,单独船体和船舵组合体相差不大,当航速高于6m/s时,单独船体的阻力比组合船体的阻力大;船体尾流影响舵体有效面积和展弦比,使航速为10m/s时船舵组合体舵失速角为35°;舵角变化对船体稳定性无明显影响。基于计算结果分析帆船比赛时转舵应用,面对较大角度转向时,建议选择偏转30°~35°的舵角进行转向;在微调航向时选择10°~25°的舵角操纵船体;面临帆船比赛绕圈判罚时,尽可能提高帆船速度,采用升力系数较大的舵角进行回转,有效的节约处罚所耗费的时间,为赢取比赛的胜利,做最佳的船舵操纵。本研究将模拟结果结合帆船运动规则和帆船航行路线,进行实际比赛过程中的应用分析,有效的促进教练员和运动员对帆船操纵的理论理解,探索了舵在帆船转向、绕标和挣脱判罚时的应用规律,为运动员帆船比赛中科学操纵帆船提供理论借鉴。
[Abstract]:The rudder is an important appendage to adjust the course and balance the transverse movement of the sailing boat, which is indispensable in the steering and marking of the sailing race. The hydrodynamic performance of the hull and the appendage of the sailboat plays a key role in the performance of the sport. Based on computational fluid dynamics (CFD) method, numerical simulation of viscous flow field of single rudder body, single hull and rudder assembly in 470 class sailboat is carried out by using Reynolds average Navier-Stokes equation Reynolds olds-averaged Navier-Stokes equations (RANSEs). The results show that the relationship between ship hull resistance and the power of ship is more and more complicated with the increase of ship speed. When the displacement of the rudder is the draught depth of 280kg, the stall angle of the rudder is 30 掳/ 35 掳and the rudder angle is 10 掳/ 25 掳. The hydrodynamic interaction of the rudder shows that the rudder has rectifying and reducing drag on the rudder system, and improves the complexity of the wake wave. When the ship speed is lower than 6m/s, the difference between the individual hull and the rudder combination is not significant, and when the ship speed is higher than 6m/s, The resistance of the single hull is greater than that of the combined hull, and the wake of the hull influences the effective area and the aspect ratio of the rudder body, which makes the stall angle of the rudder combination to be 35 掳when the speed is 10m/s, and the change of the rudder angle has no obvious effect on the stability of the ship. Based on the analysis of the results of calculation, the rudder application in sailing race is analyzed. When facing a larger angle of steering, it is suggested to choose a steering angle of 30 掳to 35 掳; to select a rudder angle of 10 掳to 25 掳in fine-tuning course; and to face the penalty of sailing around the circle. To improve the speed of the sailboat as far as possible, the rudder angle with high lift coefficient is used to rotate, which can save the time of punishment effectively, and make the best rudder control in order to win the victory of the race. In this study, the simulation results are combined with the sailing rules and the sailing route to analyze the application of the actual racing process, effectively promote the coaches and athletes to understand the theory of sailboat operation, and explore the steering of the rudder in the sailboat. The rules of application in circumscription and free from punishment provide theoretical reference for the scientific manipulation of sailboats in sailing competitions.
【学位授予单位】：武汉体育学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：G861.4

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