Design Four Propeller And Two Rudder Propulsion System's Propellers Using Panel Method

The mature of precise propeller design theory provides a possible to design requirements of the propeller. but from the lift line to the popular design of the propeller lifting surface design theory can not avoid such a problem. Theoretical research that is practical for the objects, the surface of the assumptions and improve the design accuracy of the contradiction between. Want to use the lift line or lift the surface shape of the face of the propeller design must be simplified to the body boundary condition, while the accuracy requirements for the design of the paddle also need to design the actual shape of closer. Using boundary element method for design of the propeller can be more precisely designed geometric shape of the propeller so as to better meet the specific performance of high-performance marine propeller for the requirements.In this paper, lift line theory to meet the design requirements for solving the initial propeller theory, design parameters, and compared with the traditional lift-line theory, an increase of propeller hub, viscous effects. Comparison with the use of complex numerical calculation of the cony's research, This method have less calculation but almost get the same precision, and at high speed the optimum circulation was more uniformly.The boundary element method applied to the three-dimensional numerical method for airfoil section design carried out a detailed study and an example calculation, and made a value on a specific process improvement and innovation. And presents a good pressure distribution under the form of precisely designed to meet the original of a given airfoil lift coefficient and maximum thickness of the boundary element method for limit design method.The introduction of particle swarm optimization (PSO) with boundary element method for the design of the airfoil section optimizing. CFD and optimization results are validated results show that the boundary element method for the design of the airfoil has a very high accuracy while using PSO method for airfoil optimization is reasonable and effective.Proposed a way to make the final design of paddle circulation to meet the design circulation distribution methods. Successful completion of the established design goals, and in theoretical calculations, the new design propellers have more efficient, better performance, and improve the performance of cavity. In the design of the 4 propellers with 2 rudders propulsion system, the impact of the former propeller to the rear propeller included in the accompanying flow were re-designed after the propeller. Theoretical calculations show that the design of the propeller blade is better than the prototype hydrodynamic performance.In this paper, the classical lifting-line theory as a preliminary design of the propeller to obtain the basic design parameters, the precise design of three-dimensional panel method applied to the propeller airfoil cross-section profile design, makes the airfoil cross-section of a more uniform pressure distribution on the structural strength of the to enhance and improve the performance of cavity play an active role, while the introduction of particle swarm optimization (PSO) to optimize the three-dimensional airfoil cross-section, making the design of the propeller section not only has good pressure distribution also has a higher lift-drag ratio. From each profile point of view of performance optimization and improve overall operating efficiency of the propeller. The opposite element method in the design of propeller theory, has done a lot of useful attempts and exploration.