Hydrodynamic performance analysis of propeller-rudder system with the rudder parameters changing

Abstract

In order to study the effects of geometric parameters of the rudder on the hydrodynamic performance of the propeller-rudder system, the surface panel method is used to build the numerical model of the steady interaction between the propeller and rudder to analyze the relevant factors. The interaction between the propeller and rudder is considered through the induced velocities, which are circumferentially averaged, so the unsteady problem is translated to steady state. An iterative calculation method is used until the hydrodynamic performance converges. Firstly, the hydrodynamic performance of the chosen propeller-rudder system is calculated, and the comparison between the calculated results and the experimental data indicates that the calculation program is reliable. Then, the variable parameters of rudder are investigated, and the calculation results show that the propeller-rudder spacing has a negative relationship with the efficiency of the propeller-rudder system, and the rudder span has an optimal match range with the propeller diameter. Futhermore, the rudder chord and thickness both have a positive correlation with the hydrodynamic performance of the propeller-rudder system.

Keywords

rudder geometric parameters / propeller-rudder system / induced velocity / surface panel method / efficiency / hydrodynamic performance

References

[1] Felli M. Propeller tip and hub vortex dynamics in the interaction with a rudder. Experiments in Fluids, 2011, 51(5): 1385-1402

[2] Guo C. Numerical calculation of the hydrodynamic performance of the propeller-rudder additional thrust fin system, 2006, Harbin: Harbin Engineering University, 57-61

[3] Hassan G. Computational hydrodynamic analysis of the propeller-rudder and the AZIPOD system. Ocean Engineering, 2008, 35(1): 123-125

[4] Isay W. On the interaction between ship and screw propeller. Schiffstechnik, 1965, 12(1): 65-76

[5] Jiang S. Hydrodynamic performance study of the propeller-rudder interference, 1993, Shanghai: Shanghai Jiao Tong University, 60-96

[6] Ma C, Qian Z. Hydrodynamic performance calculation and simulation study of the propeller-rudder-rudder ball propulsive system. Journal of Ship Mechanics, 2005, 9(5): 42-43

[7] Palk B, Kim K. Influence of the propeller wake sheet on rudder gap flow and gap cavitation. Ocean Engineering, 2010, 37(16): 1418-1427

[8] Pei W, Yang H. The effect of the rudder ball on the hydrodynamic performance of the propeller. Journal of Shanghai Shipping Science Institute, 1994, 17(1): 9-10

[9] Qin X, Huang S, Chang X. Research on the hydrodynamic interference of the four propellers and double rudders system. Shipbuilding of China, 2008, 49(1): 112-116

[10] Sun H, Su J, Wei J. Study about the effect of propeller-rudder distance on the propulsive performance of the propeller. Shipbuilding of China, 2012, 52(1): 4-6

[11] Su Y. A study on design of marine propellers by lifting body theory, 1999, Yokohama: Yokohama National University, 20-56

[12] Su Y, Liu Y. Surface panel method-based numerical calculation for predicting ducted propeller performances. Journal of Huazhong University of Science and Technology, 2012, 44(8): 58-59

[13] Tomasz A, Jakub H. Numerical analysis of influence of the streamline rudder on the screw propeller efficiency. Polish Maritime Research, 2010, 17(2): 18-22

[14] Wang D, Zhang Z. Propeller-rudder interference trial study. Journal of Wuhan Institute of Water Transportation Engineering, 1987, 1(11): 45-48