A new combined vortex-eliminating fin device for pod propeller and its design method

Abstract

The invention relates to a novel combined vortex-elimination fin device of a pod propeller and a design method thereof. The device is installed on the pod, and is characterized in that it includes a thrust fin and a cross tail fin; the design method includes: obtaining flow field information; Preliminary fin design; determine the optimum size of the thrust fin; preliminary design of the cross tail fin; determine the optimum size of the cross tail fin; The adverse effect of the wake vortex weakens the influence of the lateral force on the pod structure due to propeller rotation, improves the adaptability of the pod propeller to different hydrodynamic environments, increases the stability of the pod propulsion system, and reduces navigation costs as a whole ; At the same time, by flexibly adjusting the position of the thrust fin and changing the parameters of the angle of attack, the hydrodynamic performance coefficient of the pod in a specific working condition is improved; similarly, the telescopic cross tail fin can effectively improve the hydrodynamic performance of the pod in rotation.

Description

technical field [0001] The invention relates to the technical field of ship propulsion, in particular to a novel combined vortex-eliminating fin device for a pod propeller and a design method thereof. Background technique [0002] With the gradual improvement of modern ship performance standards, the requirements for navigation performance, energy saving and environmental protection are becoming more and more stringent. As one of the new propulsion systems, the pod propulsion has achieved great success in the commercial field due to its outstanding features and performance. [0003] The towed pod propeller is a relatively common type of pod propeller in the market, and its propulsion form is completely different from the traditional propeller. The existence of the pod changes the original wake of the propeller to a certain extent, and the interaction between the wake and the pod changes the overall performance of the propeller. From the perspective of improving the overall...

AI Technical Summary

Problems solved by technology

[0005] 1. The overall hydrodynamic efficiency of the propeller is lower than that of the traditional propeller

The pod is located downstream of the propeller, which will generate greater resistance in the high-speed wake, reducing the overall thrust of the propeller, thereby reducing the propulsion efficiency

[0006] 2. The propeller will generate additional lateral force, which will affect the stability of the ship's course

The traditional pod propulsion is not capable of coping with the frequent switching of different working conditions of the ship, and cannot flexibly adjust its own hydrodynamic performance parameters

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