A self-absorbing strut structure applied to small waterplane area catamaran

A technology of small water plane two-body and pillar structure, applied in the direction of hydrodynamic characteristics/hydrostatic characteristics, hull, ship construction, etc., can solve the problems that the frictional resistance of the hull cannot be significantly reduced, and the effect is not obvious

Active Publication Date: 2021-09-10
HARBIN ENG UNIV
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  • Claims
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Problems solved by technology

At present, the main means of hull drag reduction are surface coating and surface smoothness improvement, but the effect is not obvious and cannot significantly reduce the frictional resistance of hull

Method used

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  • A self-absorbing strut structure applied to small waterplane area catamaran
  • A self-absorbing strut structure applied to small waterplane area catamaran
  • A self-absorbing strut structure applied to small waterplane area catamaran

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Combining Figure 1 to Figure 5 , an automatic air-breathing prop structure applied to small waterplane area catamarans according to the present invention, the structure includes 1-air inlet; 2-air inlet duct; 3-air outlet; 6-gas diversion surface; 7-pillar; the air inlet is located on the inner side of the upper end of the pillar, and the air intake duct is located inside the pillar, connecting the air inlet and the air outlet, and the front of the air outlet is a sudden contraction Cross-section, the front of the sudden shrinkage is a sharp oncoming surface, and the rear of the gas outlet is a gas diversion surface. The pillar 7 is composed of two parts above water and underwater. The front facing surface 5 of the underwater part of the pillar is sharper and perpendicular to the horizontal plane; The incoming flow expands l...

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Abstract

The invention provides an automatic air-breathing prop structure applied to a small waterplane area catamaran, and the atmosphere at the air inlet is a standard atmospheric pressure. The air inlet duct connects the air inlet with the air outlet, and the air outlet is located in the volume collapse area behind the sudden shrinkage section. When the hull is in operation, a low-pressure area will be formed at the air outlet, and the outside atmosphere will be sucked under the liquid surface and discharged from the air outlet, so as to realize the automatic suction of the pillar. The gas is discharged from the diversion surface backwards, evenly and quickly diverted to both sides of the pillar, and mixed with the incoming flow to form a gas-water mixture, covering the surface of the rear underwater part of the pillar. The invention solves the problems that the structure of the artificial ventilation device is complicated, and the power required for ventilation is relatively large, and a flow regulating device is needed to assist the ventilation, etc., the ventilation structure is simplified, and the energy saving of the ship is realized.

Description

technical field [0001] The invention relates to an automatic air-breathing prop structure applied to a small waterplane area catamaran, and belongs to the technical field of drag reduction of catamaran props. Background technique [0002] Traditional surface boats are mainly powered by diesel engines, and the resistance of moving bodies in water is about 850 times that of air. The small waterplane area catamaran is a high-performance ship composed of three parts: the underwater double lower body, the small waterplane area pillar and the spacious upper hull. It has good lateral stability. [0003] The resistance encountered by the hull during navigation is divided into three types, including frictional resistance, shape resistance and appendage resistance, among which frictional resistance is the main body. Frictional resistance depends on the viscosity of the water and the material used on the hull's affixed surface and its surface roughness. At present, the main means of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B1/38B63B1/10
CPCB63B1/107B63B1/38B63B2001/387Y02T70/10
Inventor 安海胡震宇王革任航汪润
Owner HARBIN ENG UNIV
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