Cavitator system for suppressing cavity buoyancy effect and method thereof

Patent metadata

Field	Value
Publication number	US-10486773-B2
Application number	US-201816132947-A
Country	US
Kind code	B2
Filing date	Sep 17, 2018
Priority date	Apr 20, 2018
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A cavitator system for suppressing a cavity buoyancy effect and a control method thereof are provided. The cavitator system for suppressing a cavity buoyancy effect includes a cavity generating unit disposed at a front portion of an underwater vehicle and generating super-cavity, a pneumatic hose transferring compressed air stored in a compressed air tank to the underwater vehicle, a ventilation module positioned at a tail portion of the underwater vehicle and including at least one hole ventilating compressed air transferred through the pneumatic hose vertically downwards, and a controller sensing rise of a cavity tail portion and a change in posture of the underwater vehicle when a super-cavity is generated and ventilating compressed air through the ventilation module such that a vertically downward lift is generated at the cavity tail portion.

First claim

What is claimed is:

1. A cavitator system for suppressing a cavity buoyancy effect, the cavitator system comprising:
a cavity generating unit disposed at a front portion of an underwater vehicle and generating super-cavity;
a pneumatic hose transferring compressed air stored in a compressed air tank to the underwater vehicle;
a ventilation module positioned at a tail portion of the underwater vehicle and including at least one hole ventilating compressed air transferred through the pneumatic hose vertically downwards; and
a controller sensing rise of a cavity tail portion and a change in posture of the underwater vehicle when a super-cavity is generated and ventilating compressed air through the ventilation module such that a vertically downward lift is generated at the cavity tail portion.

2. The cavitator system of claim 1 , wherein
the controller monitors a state of the cavity tail portion according to, and determines whether to additionally ventilate compressed air ventilation compressed air to adjust a posture of the super-cavity underwater vehicle.

3. The cavitator system of claim 1 , wherein
the ventilation module includes:
a first ventilation module disposed at a position spaced apart from the cavity generating unit by a predetermined distance; and
a second ventilation module spaced apart from the first ventilation module by a predetermined distance.

4. The cavitator system of claim 3 , wherein
the controller separately controls ventilating and a ventilation rate of the first ventilation module and the second ventilation module according to the amount of compressed air to be ventilated.

5. The cavitator system of claim 1 , wherein
the controller calculates a numerical value of a lift to be generated at the cavity tail portion according to the degree of rise of the cavity tail portion, and determines a ventilation position and a ventilation rate at the ventilation module on the basis of the calculated numerical value of the lift.

6. The cavitator system of claim 1 , wherein
the ventilation module includes a plurality of hole ventilation ports and one or more slit type ventilation ports.

7. The cavitator system of claim 6 , wherein
in the ventilation module, the plurality of hole ventilation ports have a structure in which the other remaining hole ventilation ports are radially disposed centered on one hole ventilation port, and one or more slit type ventilation ports are disposed on the periphery of the hole ventilation ports.

8. An operation method of a cavitator system, the operation method comprising:
sensing rise of a cavity tail portion when a super-cavity is generated in an underwater vehicle;
calculating a ventilation amount of compressed air for generating a vertically upward lift at the cavity tail portion;
ventilating compressed air vertically downwards through one or more holes disposed at a tail portion of the underwater vehicle on the basis of the calculated ventilation amount; and
monitoring a state of the cavity tail portion according to the ventilation result.

9. The operation method of claim 8 , further comprising:
determining whether to additionally ventilation compressed air to adjust a is posture of the super-cavity underwater vehicle according to the monitoring.

Assignees

• Agency Defense Dev

Inventors

• Kim Minjae
• Jung Youngrae
• Lee Kurnchul

Classifications

• F15D1/12

  by influencing the boundary layer · CPC title

• F15D1/008 Primary

  comprising fluid injection or suction means · CPC title

• B63G8/16

  by direct use of propellers or jets · CPC title

• B63B1/38 Primary

  using air bubbles or air layers {gas filled volumes (waterborne vessels travelling on air cushions B60V3/06)} · CPC title

• B63B2001/387

  using means for producing a film of air or air bubbles over at least a significant portion of the hull surface · CPC title