Device for reducing navigation resistance on ship with moon pool

A ship and resistance technology, applied in the direction of hull, ship construction, hull design, etc., can solve the problems of increasing fuel consumption, increasing drilling ship navigation resistance, reducing economy, etc., to achieve the suppression of water flow separation, obvious diversion effect, and reduce navigation The effect of resistance
CN104340331AInactive Publication Date: 2015-02-11708TH RES INST OF CSSC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
708TH RES INST OF CSSC
Publication Date
2015-02-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a device for reducing navigation resistance on a ship with a moon pool. The ship with the moon pool comprises a hull and the moon pool. The moon pool penetrates the hull. The device comprises a first flow guide plate and a second flow guide plate. The first flow guide plate and the second flow guide plate are fittingly arranged at a bottom opening of the moon pool and are respectively hinged to the bottom opening of the moon pool, a plurality of wing-shaped components are arranged on the first flow guide plate and the second flow guide plate along the length direction of the ship at intervals and are penetratingly arranged on the first flow guide plate and the second flow guide plate, front edges and rear edges are arranged on the wing-shaped components, each front edge of the corresponding wing-shaped component has an arc-shaped section, the section of each rear edge of the corresponding wing-shaped component is in the shape of an acute angle, each front edge and the corresponding rear edge are respectively arranged at two ends of the corresponding wing-shaped component, and the front edges face the direction of a stem of the ship. According to the technical scheme, the device has the advantages that obvious flow guide effects can be realized, vortex due to sudden change of the geometric shape of the opening of the moon pool can be reduced, and separation of water flow at the bottom of the moon pool and sloshing of water in the moon pool can be suppressed; the water in the moon pool is basically static during navigation, and accordingly the purpose of reducing the navigation resistance can be achieved.
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Description

technical field

[0001] The invention belongs to the technical field of marine engineering ships, and relates to a device for reducing the navigation resistance of ships with moon pools, and is especially suitable for drilling ships with moon pool openings. Background technique

[0002] In addition to the conventional equipment required by the ship, the drilling ship also has related drilling equipment such as a derrick, and a moon pool opening for lowering the wellhead equipment. Drilling ships are capable of self-propelling, with a speed of more than 10 knots. Compared with semi-submersible drilling platforms, they are more maneuverable, have a larger waterplane area and larger variable loads, and are more suitable for deepwater drilling operations. When the drilling ship is sailing, the existence of the moon pool will additionally increase the sailing resistance. According to relevant research at home and abroad, the opening of the moon pool will increase the navigation r...

Claims

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