本文選題：螺旋槳 + 最佳環(huán)量��； 參考：《中國艦船研究院》2016年碩士論文

【摘要】：在船舶節(jié)能減排雙重驅(qū)動(dòng)下,高效螺旋槳的設(shè)計(jì)應(yīng)用備受關(guān)注。螺旋槳最佳環(huán)量設(shè)計(jì)方法是螺旋槳理論設(shè)計(jì)中的重要方法。早期的設(shè)計(jì)理論并不考慮槳轂的作用,然而槳轂又是真實(shí)存在的,故應(yīng)用無限長圓柱模擬槳轂影響的鏡像渦方法被提出。但是,鏡像渦方法不能完全真實(shí)的反映槳轂表面邊界條件,且適用范圍受限。為此,本文提出了應(yīng)用高精度面元法模擬槳轂影響的方法,并據(jù)此建立了考慮槳轂影響的螺旋槳最佳環(huán)量設(shè)計(jì)方法,具有學(xué)術(shù)研究意義和工程應(yīng)用價(jià)值。首先,應(yīng)用高精度面元法模擬槳轂,通過推導(dǎo)統(tǒng)一的誘導(dǎo)速度影響系數(shù)建立了槳轂影響與槳葉環(huán)量的關(guān)系,進(jìn)而提出了一種考慮槳轂影響的槳葉升力線和槳轂面元法耦合的最佳環(huán)量設(shè)計(jì)方法。其次,針對(duì)設(shè)計(jì)方法在數(shù)值離散求解中可能會(huì)出現(xiàn)的數(shù)值問題,如升力線模型在葉根和葉梢的奇性性、離散化尾渦模型收斂性等,進(jìn)行了研究分析,給出了建議的處理方式,檢驗(yàn)了數(shù)值求解方法的可靠性。再次,應(yīng)用本文的設(shè)計(jì)方法,對(duì)DTMB 4119槳進(jìn)行了重新設(shè)計(jì),與傳統(tǒng)方法的設(shè)計(jì)結(jié)果進(jìn)行了對(duì)比分析,驗(yàn)證了新設(shè)計(jì)方法的可行性。在此基礎(chǔ)上,進(jìn)一步分析了槳轂形狀和伴流對(duì)螺旋槳最佳環(huán)量分布的影響,結(jié)果表明槳轂半徑具有較大影響并應(yīng)進(jìn)行適伴流設(shè)計(jì)。然后,以某散貨船為例,進(jìn)行了給定三種圖譜槳環(huán)量分布形式與最佳環(huán)量分布形式的螺旋槳設(shè)計(jì),分析對(duì)比了四種環(huán)量分布形式設(shè)計(jì)結(jié)果的差異,結(jié)果表明在升力線理論中最佳環(huán)量分布形式具有最高的敞水效率。最后,對(duì)考慮槳轂影響時(shí),環(huán)量變化量引起的槳轂誘導(dǎo)阻力進(jìn)行了討論,葉根載荷增加后,槳轂會(huì)有約1%螺旋槳推力的誘導(dǎo)阻力變化,該阻力變化量應(yīng)在螺旋槳初步設(shè)計(jì)過程中予以充分考慮。
[Abstract]:Under the dual driving of energy saving and emission reduction, the design and application of high efficiency propeller have attracted much attention. The design method of optimal annular volume of propeller is an important method in the theoretical design of propeller. The early design theory did not consider the role of the propeller hub, but the impeller hub is real, so an infinite cylindrical mirror vortex method is proposed to simulate the impeller hub effect. However, the mirror vortex method can not completely reflect the boundary conditions of the propeller hub surface, and the range of application is limited. In this paper, a high precision panel method is proposed to simulate the influence of propeller hub, and based on this method, an optimal design method of propeller ring is established, which is of academic significance and engineering application value. Firstly, the high precision panel method is used to simulate the impeller hub, and the relationship between the impeller hub and the impeller ring is established by deducing the uniform coefficient of induced velocity influence. Furthermore, an optimal design method for the coupling of the lift line of the propeller blade and the surface element method of the propeller hub considering the influence of the propeller hub is proposed. Secondly, the numerical problems, such as the singularity of the lift line model in the leaf root and tip, the convergence of the discrete wake model and so on, are studied and analyzed, and the proposed treatment methods are given. The reliability of the numerical method is tested. Thirdly, the DTMB 4119 propeller is redesigned by using the design method in this paper, and compared with the traditional design results, the feasibility of the new design method is verified. On this basis, the influence of propeller hub shape and wake flow on the optimal annular distribution of propeller is further analyzed. The results show that the radius of propeller hub has great influence and the suitable wake design should be carried out. Then, taking a bulk carrier as an example, the propeller design with given three patterns of propeller ring distribution and optimal ring distribution is carried out, and the differences of the design results of four kinds of ring distribution are analyzed and compared. The results show that the optimal ring distribution has the highest open water efficiency in the lift line theory. Finally, when considering the influence of propeller hub, the induced resistance of propeller hub caused by the change of ring volume is discussed. When the load of blade root increases, the induced resistance of propeller thrust will change by about 1%. The resistance variation should be fully considered in the preliminary design of propeller.
【學(xué)位授予單位】：中國艦船研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U664.33

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