RU2600263C1 - High-speed catamaran - Google Patents

Abstract

FIELD: ship building.

SUBSTANCE: invention relates to ship building, mainly river one, and can be used to create high-speed passenger ships. Two-hull vessel comprises two hulls interconnected by a connecting bridge. Hulls in the plan have the shape of a flat-convex wing with flat external side surfaces and are made of a rectangular cross-section. Underbottom the interhull space over its entire square is overlapped by a horizontal plane having in the longitudinal cross-section the shape of a flat-convex wing with a flat bottom surface.

EFFECT: use of the invention allows to reduce wave impedance and, hence, to increase the catamaran speed.

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Description

The invention relates to the field of shipbuilding, mainly high-speed river, and can be used for passenger transportation both on rivers (var. Shallow) and in the coastal sea zone and can serve as an alternative to hovercraft.

Catamarans are known in which, in order to reduce wave resistance, it is proposed to use asymmetric hulls having a planar-convex wing shape with flat outer surfaces (patent RU No. 2106279), but the achieved effect is insignificant due to the “leakage” of the transverse inter-hull wave downward during movement her relative to the hulls of the vessel. And the rectangular section of these bodies increases the wetted surface (in comparison with the bodies of circular cross section), increasing the energy loss due to friction, which reduces the achieved effect to zero. And because of this, the proposed method of reducing wave impedance has not found practical application.

The aim of the invention is to achieve the recovery of most of the energy of the transverse intercavity wave arising from the high-speed movement of a catamaran with asymmetric hulls (approximately 80 ÷ 90%).

Technically, the result is achieved in that in a catamaran containing two hulls connected to each other by a connecting bridge, in which each hull has a planar-convex wing shape with a flat, vertically located outer surface and a curved inner, relative to the longitudinal axis of the catamaran and with flat horizontally located upper and lower planes and in which each cross section has a rectangular shape, according to the invention, the lower surfaces of the cases are connected to each other horizontally but located by a plane having a longitudinal section in the form of a plane-convex wing with a flat lower surface. In this case, the propulsors (var. Propellers) are located in the narrowest place of the interbody space. A horizontally located plane overlaps the entire inter-space in its lower part. Under the lower surface of a horizontally located plane in its front, thin-layer compressed air is supplied. To ensure uniform distribution of compressed air over the entire lower surface of the horizontally located plane and the lower surface of the catamaran bodies, longitudinal ribs are installed on their outer surface and along the entire length.

In FIG. 1 shows a high-speed catamaran (hereinafter V.K.) in a longitudinal section. In FIG. 2 - V.K., section A-A. In FIG. 3 and 4, a shear wave energy recovery scheme is shown.

VK. contains two asymmetric cases 1 connected by a bridge 2, a lower horizontal plane 3 with longitudinal ribs 4 and movers 5.

Shear wave energy recovery in the proposed V.K. carried out as follows. When moving V.K. the oncoming water at high speed due to its inertia creates excessive pressure in the front of the inter-hull space, raising a transverse wave (see Fig. 3), which creates the so-called wave resistance, which slows down the vessel. But after passing through the narrowest point in the interbody space (BB), the transverse wave begins to give off its energy (recovery), exerting additional hydrostatic pressure on the diverging internal surfaces of V.K. (ridge effect). In this case, the horizontally located plane 3 prevents the outflow of energy of the transverse wave down the interbody space. The horizontally located plane 3 creates an additional wetted surface, thereby increasing friction energy losses, and air “lubrication” is used to reduce it (under its lower surface, as well as under the lower surfaces of V.K. housings, compressed air is supplied from the compressor in a thin layer - not shown )

Using the principle of transverse wave energy recovery will minimize wave impedance, which is the main obstacle to the creation of high-speed displacement ships. And the high efficiency and large carrying capacity inherent in vessels of this type provide them with a number of advantages compared to high-speed vessels of other types (on half wings, on / in the pillow, etc.). In addition, the principle of transverse wave energy recovery is applicable not only for motorized vessels, but for sailing (var. Sports).

Claims (5)

1. A high-speed catamaran containing two hulls interconnected by a connecting bridge, in which each hull has a planar-convex wing shape with a flat vertically located outer lateral surface and a curved inner relative to the longitudinal axis of the catamaran, and with flat horizontally located upper and lower planes and in which each cross section has a rectangular shape, characterized in that the lower surfaces of the cases are connected horizontally to each other a married plane having in the longitudinal section the shape of a plane-convex wing with a flat lower surface. 2. Catamaran according to claim 1, characterized in that the propulsors are located in the narrowest place of the inter-hull space. 3. Catamaran according to claim 1, characterized in that the horizontally located plane overlaps the entire inter-space in its lower part. 4. Catamaran according to claim 3, characterized in that under the lower surface of a horizontally located plane in its front part, compressed air is thinly fed. 5. Catamaran according to claim 3, characterized in that uniformly distributed longitudinal ribs are installed on the outside of the lower surface of the hulls and a horizontal plane along their entire length.

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