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Influence of fins on tractor-type podded propulsor performance


Influence of fins on tractor-type podded propulsor performance
XIE Xue-shen* and HUANG Sheng
College of Ship Building Engineering, Harbin Engineering University, Harbin 150001, China
podded propulsor with fin panel method hydrodynamic performance flow field
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.


[1] WANG Zhihua. Electric power podded propulsion[J]. Marine Electric & Electronic Engineering, 1999, 19(4): 30-32.
[2] ZHAO Hong, SUN Peiting. The development of marine electric propulsion[J]. Marine Technology, 2003(1): 52-53.
[3] JI Luming, WANG Qingzhou. Azipod electric under water pod propulsion system for century 21[J]. Ship Engineering, 2002, 24(2): 61-64.
[4] YANG Chenjun, QIAN Zhengfang, MA Cheng. Influences of pod on the propeller performance[J]. Journal of Shanghai Jiaotong University, 2003, 37(8): 1229-1233.
[5] 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.
[6] 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.


Last Update: 2010-05-02