JPH0329280Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a submersible that reduces hull resistance during diving or surfacing.

[Conventional technology]

There is a conventional manned submersible as shown in Figure 4, but due to the structure, such a manned submersible has
Due to layout or rigging requirements, the bow part 1f is often shaped to protrude above the front part of the hull.
That is, a recess 10 is formed below the bow.

In a manned submersible, horizontal stabilizing fins 2 and vertical stabilizing fins 3 are used to ensure stability when the hull 1 moves straight at low speed.
is fixedly installed at the rear of the hull 1, and is also provided with a pressure shell 4 for accommodating a control and monitoring mechanism and crew members, and a pressure shell observation window 5 for observing external conditions. Further, the bow section 1f accommodates research and observation equipment 6 such as lighting, a camera, a strobe, a TV camera, a current meter, and a depth meter for observing and recording the topography and living things of the seabed. In addition, 7 is a propulsion device of the submersible, 8 is a ballast tank used for diving and surfacing of the hull, and 9 is a battery as a power source for propulsion or inside the submersible.

[Problem that the invention attempts to solve]

By the way, when the bow part 1f protrudes from the hull 1 in this way, when infiltrating, the bow part 1f as shown in FIG.
The lower surface of the submersible receives water flow from below, which adds a large amount of fluid resistance to the submersible. Also, when surfacing, the water flow from above flows through the bow section 1, as shown in Figure 5b.
It separates from the hull at the lower surface of f, forms a vortex, and the bow section 1
A large fluid resistance is applied to f compared to other parts of the submersible. For this reason, the time required for the submersible to enter and surface becomes longer, and there is a problem in that the submersible cannot take a longer time to work at the desired predetermined depth.

In order to solve this problem, it is conceivable to eliminate the bow part 1f that protrudes from the hull, but in this case, the resistance of the submersible will certainly be greatly reduced and the above purpose can be achieved, but the survey observation equipment 6 There are problems with the placement of the ship, and problems with adjusting the balance between the weight and buoyancy of the hull. The present invention attempts to solve these problems by providing a rectifying plate in the recess under the bow of the ship to reduce the resistance of the water flow to the underside of the bow or to reduce the resistance to the hull at the underside of the bow. It is an object of the present invention to provide a submersible vessel which can reduce the occurrence of separation vortices in the flow of water along the submersible vessel and reduce the fluid resistance during diving and surfacing.

[Means for solving problems]

Therefore, the submersible of the present invention is a submersible that has a bow section that projects upward from the hull.
A feature is that a rectifying plate is provided in the concave portion of the bow in order to prevent turbulence of water flow caused by the concave portion below the bow portion during diving or ascent.

[Effect]

According to the above-mentioned submersible of the present invention, diving of the submersible
During surfacing, the flow that the bow receives becomes smoother due to the presence of the current plate along the bow hull.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A submersible as an embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a side view schematically showing its general configuration, Fig. 2 is a plan view showing an example of the current plate, and Fig. 3 is a cross-section of the bow of the submersible when it enters and surfaces. It is a schematic diagram showing a flow state.

As shown in Figure 1, the submersible includes a hull 1, horizontal stabilizing fins 2, vertical stabilizing fins 3, pressure shell 4, pressure shell viewing window 5, survey and observation equipment 6, propulsion device 7, ballast tank 8, battery 9, etc. Its structure, operation and effect are the same as the conventional one described above. This submersible has a shape in which the bow part 1f protrudes upward and forward of the pressure hull 4 in order to arrange the pressure hull observation window 5 and mount the survey and observation equipment 6.
is formed. A grid-like or antenna-like current plate 11 as shown in FIG. 2 is attached to the hull below the bow part 1f so as to face horizontally forward.

When a submersible dives, the lower surface of the bow part 1f receives a flow from below as shown in FIG.
The water flow at the rear of the ship is decelerated and at the same time becomes a turbulent flow that spreads behind the current plate, and the flow at the bow part 1f becomes smoother along the hull, so the fluid resistance at the bow part 1f is greatly reduced. On the other hand, since the rectifier plate 11 has a lattice-like or antenna-like shape, the rectifier plate 11 has a smaller influence on the flow.
1 itself has extremely small resistance, and the resistance applied to the hull of the ship including the bow part 1f and the current plate 11 can be reduced compared to the case without the current plate 11.

When floating, the bow part 1f receives a flow from above as shown in FIG. A smooth flow can be obtained along the hull due to the pressure, and the resistance applied to the hull including the bow part 1f and the current plate 11 can be reduced.

As a result, the time required for the submersible to enter and surface can be significantly shortened, the time required for the submersible to work at a predetermined depth can be extended, and the submersible can be operated efficiently. Although not shown, the second
Similar effects can be obtained by vertically extending an ordinary flat plate different from the one shown in the figure in the center of the recess 10 below the ship's main part 1f in the same direction as the ship's center line.
In other words, a flat plate vertical in the same direction as the hull centerline is recessed 1.
0, the flow from above or below is divided, and the flow flows through the hull as if it were flowing along a streamlined object, without creating a stagnation point below the bow section 1f or creating a separation vortex. , which greatly reduces the increase in resistance that occurs in this area. Further, the fluid resistance caused by the added flat plate is minute.

[Effect of idea]

As detailed above, according to the submersible of the present invention,
With a simple configuration in which a current plate is provided below the bow of the ship that protrudes above the front of the ship, the flow at the bow of the submersible when it dives and surfaces can be made smoother along the ship's hull. , the resistance applied to the hull can be significantly reduced. As a result, the time required for submersibles to enter and surface can be significantly reduced.
This has the advantage of enabling efficient operation.

[Brief explanation of the drawing]

Figure 1 is a side view of a submersible as an embodiment of the present invention, and Figure 2 is an embodiment of the current plate used in the submarine of the present invention. It shows something like an antenna. Figure 3 is a schematic diagram showing the flow in the cross section of the bow of a submersible as an embodiment of the present invention during infiltration and surfacing.
FIG. 3b shows the state during levitation. Fig. 4 is a side view of a conventional submersible, and Fig. 5 is a submersible of a conventional submersible.
FIG. 5A is a schematic diagram showing the flow in a cross section of the bow section during surfacing, and FIG. 5A shows the state when diving, and FIG. 5B shows the state when surfacing. 1...Hull, 1f...Fore part, 2...Horizontal stabilizing fin, 3...Vertical stabilizing fin, 4...Pressure shell, 5...
...Pressure shell viewing window, 6...Survey observation equipment, 7...
Propulsion device, 8...Ballast tank, 9...Battery,
10... recess, 11... rectifying plate.

Claims (1)

[Scope of utility model registration request] In a submersible vessel having a bow section projecting upward from the front part of the hull, a rectifying plate is provided in the concave section in order to prevent turbulence of water flow caused by the concave section below the bow section during diving or surfacing. A submersible featuring: