Abstract
A mathematical model of podded propulsors was established in order to investigate the influence of fins. The hydrodynamic performance of podded propulsors with and without fins was calculated, with interactions between propellers and pods and fins derived by iterative calculation. The differential equation based on velocity potential was adopted and hyperboloidal panels were used to avoid gaps between surface panels. The Newton-Raphson iterative procedure was used on the trailing edge to meet the pressure Kutta condition. The velocity distribution was calculated with the Yanagizawa method to eliminate the singularity caused by use of the numerical differential. Comparisons of the performance of podded propulsors with different fins showed that the thrust of propeller in a podded propulsor with fins is greater. The resistance of the pod is also reduced because of the thrust of the fin. The hydrodynamic performance of a podded propulsor with two fins is found to be best, the performance of a podded propulsor with one fin is not as good as two fins, and the performance of the common type is the worst.
摘 要
为研究鳍的影响, 建立了吊舱推进器的水动力性能的计算쒣型. 计算了吊舱推进器安装和不安装鳍时的水动力性能, 螺旋붰与뗵舱及鳍之间的相互影响通过迭代计算加以考虑. 采用基于速度势的基本积分微分方程, 并采用双曲面元以消除面元间的间隙. 采用 Newton-Raphson 迭代求解压力分布使得桨叶的随边满足压力库塔条件, 用柳泽的方法求得物体表面的速度分布以避免数值求导的奇异性. 无鳍, 单鳍和双鳍的吊舱推进器水动力性能计算结果表明, 附加鳍时吊舱推进器的螺旋桨推力增加, 由于鳍上产生推力导致吊舱阻力减小.附加双鳍时的吊舱推进器水动力性能最好, 附加单鳍时次之, 无鳍时最低.
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References
WANG Zhihua. Electric power podded propulsion[J]. Marine Electric & Electronic Engineering, 1999, 19(4): 30–32.
ZHAO Hong, SUN Peiting. The development of marine electric propulsion[J]. Marine Technology, 2003(1): 52–53.
JU Luming, WANG Qingzhou. Azipod electric under water pod propulsion system for century 21[J]. Ship Engineering, 2002, 24(2): 61–64.
YANG Chenjun, QIAN Zhengfang, MA Cheng. Influences of pod on the propeller performance[J]. Journal of Shanghai Jiaotong University, 2003, 37(8): 1229–1233.
HUANG Sheng, WANG Peisheng, HU Jian. A method for numerical calculation of propeller hydrodynamics in unsteady inflow[J]. Journal of Marine Science and Application, 2007, 6(2): 6–11.
SU Yumin, IKEHATA Mitsuhisa, KAI Hisashi. Numerical analysis of the flow field around marine propellers by surface panel method[J]. Ocean Engineering, 2002, 20(3): 44–48.
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Foundation item: Supported by the National Natural Science Foundation of China under Grant No.10702016.
XIE Xue-shen was born in 1982. He is a doctor of Design and Construction of Naval Architecture and Ocean Structure at Harbin Engineering University. His current research interest includes marine special propulsor.
HUANG Sheng was born in 1945. He is a professor at Harbin Engineering University. His current research interests include shipbuilding engineering, marine propulsor and energy-saving.
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Xie, Xs., Huang, S. Influence of fins on tractor-type podded propulsor performance. J. Marine. Sci. Appl. 8, 222–227 (2009). https://doi.org/10.1007/s11804-009-8023-2
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DOI: https://doi.org/10.1007/s11804-009-8023-2