A suction-type drag suppression and auxiliary cooling device for a pod propeller

Abstract

The invention relates to a suction-type resistance restraint and auxiliary cooling device for a pod propeller. The device starts from the connection area between the pod body and the bracket, propells the outer edge of the motor along the pod body, and reaches the tail of the pod body; it is characterized in that it includes A vortex suction module, a diversion channel module and a water flow propulsion module; the vortex suction module is installed on the surface of the pod body and communicated with the interior of the pod body; the diversion channel module is arranged in the pod body and the diversion channel module The two ends are respectively connected with the vortex suction module and the water flow propulsion module; mainly by adjusting the power of the water flow propulsion device, the size and speed of the water flow in the device are controlled; the fluid environment around the pod is improved, the pressure resistance is reduced, and the wake vortex is suppressed generation; in the process, the low-temperature fluid is used to quickly flow through to improve the heat dissipation efficiency of the pod propeller, and to improve the original difficult-to-heat dissipation areas.

Description

technical field [0001] The invention relates to the technical field of ship propulsion, in particular to a suction-type resistance suppression and auxiliary cooling device for a pod propeller. 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. 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. [0003] At present, in the actual application of the traditio...

AI Technical Summary

Problems solved by technology

[0003] At present, in the actual application of the traditional towed pod propeller, the flow field of the pod body and the structure of the pod body have an impact on the overall propulsion effect

First of all, the pod is located downstream of the propeller, the surface of the tail cabin is shrunk, and the cross-section is reduced. In the high-speed wake, a low-pressure area will be generated; on the contrary, the front end of the pod body and the front end of the pod support squeeze the fluid volume to form a high-pressure area. , the two can be considered as pressure resistance, which reduces the overall thrust of the propeller, thereby reducing the propulsion efficiency

Secondly, the thruster propeller will generate lateral force, which affects the flow field around the pod. Generally, it is necessary to set a small amount of deflection angle of the propeller or frequent steering to ensure the heading during direct flight, which increases energy consumption.

At the same time, the wake of the pod will form a vortex, which reduces the propulsion efficiency of the pod and may cause a difference in the service life of the materials on both sides of the pod, which is not suitable for maintenance

Furthermore, the built-in propulsion motor in the pod usually dissipates the heat generated by the pod by using the surrounding flow field environment directly through the pod wall. Large size, difficult to dissipate heat

And the flow field is relatively complex, and the turbulence dissipation is serious

Secondly, the use of seawater to dissipate heat is generally to improve the heat dissipation effect. Generally, a single-layer structure is used, and it is difficult to apply a double-layer structure, and it is impossible to enjoy the advantages of protection brought by the double-layer structure.

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