本文選題：470級帆船 + 舵　； 參考：《武漢體育學(xué)院》2017年碩士論文

【摘要】：舵是帆船運(yùn)動(dòng)時(shí)調(diào)整航向和平衡帆船橫移的重要附體,在帆船比賽轉(zhuǎn)向和繞標(biāo)中必不可少,帆船船體及附體的水動(dòng)力性能對運(yùn)動(dòng)成績具有關(guān)鍵性影響,本研究基于計(jì)算流體力學(xué)方法(Computational Fluid Dynamics,CFD),采用雷諾平均納維爾-斯托克斯方程(Reynolds-averaged Navier-Stokes Equations,RANSE)求解數(shù)值方法對470級帆船中單獨(dú)舵體、單獨(dú)船體、船舵組合體的粘性流場進(jìn)行了模擬。研究表明,單獨(dú)船體和船舵組合體中的船體阻力值與船速成冪次方的關(guān)系,隨速度的增加,興波情況越來越復(fù)雜。船舵組合系統(tǒng),在排水量為280kg的吃水深度時(shí),舵的失速角處于30°~35°,舵角在10°~25°時(shí)舵體升阻比較高。船舵水動(dòng)力相互影響發(fā)現(xiàn)舵體對船舵系統(tǒng)具有整流減阻作用,改善船體尾流興波的復(fù)雜程度,當(dāng)船速低于6m/s時(shí),單獨(dú)船體和船舵組合體相差不大,當(dāng)航速高于6m/s時(shí),單獨(dú)船體的阻力比組合船體的阻力大;船體尾流影響舵體有效面積和展弦比,使航速為10m/s時(shí)船舵組合體舵失速角為35°;舵角變化對船體穩(wěn)定性無明顯影響�；谟�(jì)算結(jié)果分析帆船比賽時(shí)轉(zhuǎn)舵應(yīng)用,面對較大角度轉(zhuǎn)向時(shí),建議選擇偏轉(zhuǎn)30°~35°的舵角進(jìn)行轉(zhuǎn)向;在微調(diào)航向時(shí)選擇10°~25°的舵角操縱船體;面臨帆船比賽繞圈判罰時(shí),盡可能提高帆船速度,采用升力系數(shù)較大的舵角進(jìn)行回轉(zhuǎn),有效的節(jié)約處罰所耗費(fèi)的時(shí)間,為贏取比賽的勝利,做最佳的船舵操縱。本研究將模擬結(jié)果結(jié)合帆船運(yùn)動(dòng)規(guī)則和帆船航行路線,進(jìn)行實(shí)際比賽過程中的應(yīng)用分析,有效的促進(jìn)教練員和運(yùn)動(dòng)員對帆船操縱的理論理解,探索了舵在帆船轉(zhuǎn)向、繞標(biāo)和掙脫判罰時(shí)的應(yīng)用規(guī)律,為運(yùn)動(dòng)員帆船比賽中科學(xué)操縱帆船提供理論借鑒。
[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 擄/ 35 擄and the rudder angle is 10 擄/ 25 擄. 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 擄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 擄to 35 擄; to select a rudder angle of 10 擄to 25 擄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.
【學(xué)位授予單位】：武漢體育學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：G861.4

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本文編號：1926324