CN111605661A

CN111605661A - Thrust-increasing retaining structure for outer shell of hydrodynamic vehicle

Info

Publication number: CN111605661A
Application number: CN202010495607.7A
Authority: CN
Inventors: 田新亮; 王道勇; 王鹏; 张显涛; 李欣; 郭孝先; 卢文月
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-09-01

Abstract

The invention discloses a thrust-increasing and backstop structure for a fluid vehicle shell, and belongs to the field of ship and ocean engineering. The invention comprises a fixed bracket and an asymmetric structure; the fixed support is arranged at the bottom of the outer shell of the fluid vehicle, the fixed support is rectangular, the asymmetric structure is arranged on the fixed support, the asymmetric structure is in a sawtooth shape, and the length of the asymmetric structure is the same as that of the fixed support. The invention is applied to the fluid aircraft, so that the aircraft can obtain forward thrust on average, the effects of thrust augmentation and stopping are further achieved, and the navigation efficiency of the fluid aircraft is improved.

Description

Thrust-increasing retaining structure for outer shell of hydrodynamic vehicle

Technical Field

The invention belongs to the field of ship and ocean engineering, and relates to a thrust-increasing and stopping structure for a fluid vehicle shell.

Background

In recent years, fluid vehicles have found a great deal of engineering practice, widely in the oceans, rivers, biological fluids and air. Some unmanned fluid vehicles play a vital role in the fields of resource exploration, environmental monitoring, military reconnaissance and the like.

The speed of flight is a key parameter for assessing the overall performance of a fluid vehicle. Faster sailing speeds mean higher operating efficiency and less energy consumption. However, some vehicles are difficult to move along a predetermined course all the time in an oscillating fluid environment due to interference from environmental factors such as waves and currents and the limitation of self-driving capability, such as some small unmanned sea-surface vessels such as wave gliders. In such cases, this type of fluid vehicle can oscillate repeatedly in the direction of travel, thereby reducing the speed of travel and, in turn, the operating efficiency and economy of the vehicle.

The current research aiming at improving the navigation efficiency of the fluid aircraft mainly aims to improve the overall structural shape of the outer shell of the fluid aircraft, such as designing a streamline outer shell, installing a bulb nose head, adopting a square tail structure and the like. The designs can effectively reduce the navigation resistance of the aircraft along the advancing direction and improve the navigation speed. However, for the fluid vehicle with unstable motion in the oscillating fluid, the designs cannot play a role in restraining the backward motion.

Therefore, those skilled in the art are devoted to developing a simple and feasible thrust augmentation backstop device for use in fluid vehicles that travel in an oscillating fluid environment.

Disclosure of Invention

In view of the above defects in the prior art, the technical problem to be solved by the present invention is that the hydrodynamic vehicle is disturbed in the oscillating fluid, which affects the sailing efficiency.

In order to achieve the aim, the invention provides a thrust-increasing backstop structure for a hull of a fluid vehicle, which comprises a fixed bracket and an asymmetric structure; the fixed support is arranged at the bottom of the outer shell of the fluid vehicle, the fixed support is rectangular, the asymmetric structure is arranged on the fixed support, the asymmetric structure is in a sawtooth shape, and the length of the asymmetric structure is the same as that of the fixed support.

Further, the asymmetric structure is composed of a plurality of triangles.

Further, a number of the triangles are the same size.

Further, the bevel edge of the triangle close to the bow of the hydrodynamic craft is smaller than the bevel edge of the triangle close to the stern of the hydrodynamic craft.

Further, the fixing bracket is a steel structure.

Further, the fixed support is connected with the outer shell of the fluid aircraft in a welding mode.

Further, the asymmetric structure is connected with the fixed support in a welding mode.

Further, the asymmetric structure can be cut at a time from a steel plate.

Furthermore, the asymmetric structure can also be formed by welding a plurality of triangular plates.

Further, the fixed bracket can also be connected with the hull of the hydrodynamic vehicle through bolts.

The invention has the technical effects that:

the thrust-increasing and backstop-stopping structure is designed for a fluid aircraft moving in oscillating fluid, can increase the fluid resistance of the aircraft during backing, effectively restrains the tendency of backing movement, enables the aircraft to obtain forward thrust on average, further achieves the effect of thrust-increasing and backstop-stopping, and improves the navigation efficiency of the fluid aircraft.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a schematic application diagram of a thrust augmentation and backstop structure for a hull of a hydrodynamic vehicle according to a preferred embodiment of the invention.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in fig. 1, the thrust augmentation and stopping structure for the hull of a hydrodynamic vehicle comprises a fixed support 2 and an asymmetric structure 3; the fixed support 2 is arranged at the bottom of the shell of the fluid vehicle 1, the fixed support 2 is rectangular, the asymmetric structure 3 is arranged on the fixed support 2, the asymmetric structure 3 is in a sawtooth shape, and the length of the asymmetric structure 3 is the same as that of the fixed support 2. The asymmetric structure 3 is composed of a plurality of triangles, the triangles are the same in size, and the bevel edge of each triangle close to the bow of the hydrodynamic vehicle is smaller than the slope angle of the bevel edge close to the stern of the hydrodynamic vehicle. The fixed support 2 is a steel structure, the fixed support 2 is connected with the outer shell of the fluid aircraft in a welding mode, and the asymmetric structure 3 is connected with the fixed support 2 in a welding mode. The asymmetric structure 3 can be formed by cutting a steel plate at one time, and the asymmetric structure 3 can also be formed by welding a plurality of triangular plates. The fixed bracket 2 can also be connected with the hull of the fluid vehicle 1 by bolts.

As shown in fig. 1, the bow of the fluid vehicle 1 is on the left, and when the fluid vehicle 1 navigates in the oscillating fluid, a tendency to move forward or backward is created depending on the direction of movement of the fluid. According to different principles of positive and negative direction fluid forces of the asymmetric structure 3, when the fluid vehicle 1 runs leftwards and the oscillation direction is also leftwards, the fluid resistance is smaller because the slope angle of the asymmetric structure 3 along the direction is smaller; when the fluid vehicle 1 travels leftwards and the oscillation direction is rightwards, the fluid vehicle 1 is subjected to larger fluid resistance due to the larger slope angle of the oscillation direction of the asymmetric structure 3, and the sailing direction of the fluid vehicle is opposite to the oscillation direction, namely along the overall sailing direction. Therefore, the fluid vehicle 1 can obtain forward thrust in an average sense, the trend of backward movement is restrained, the effects of increasing thrust and stopping backward are achieved, and the navigation efficiency of the fluid vehicle 1 is improved.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A thrust-increasing and backstop structure for a hull of a fluid vehicle is characterized by comprising a fixed support and an asymmetric structure; the fixed support is arranged at the bottom of the outer shell of the fluid vehicle, the fixed support is rectangular, the asymmetric structure is arranged on the fixed support, the asymmetric structure is in a sawtooth shape, and the length of the asymmetric structure is the same as that of the fixed support.

2. The thrust-augmenting backstop structure for craft hulls according to claim 1, characterized in that said asymmetrical structure is composed of several triangles.

3. The thrust augmentation and anti-backup structure for an outer skin of a fluid craft according to claim 1, wherein a plurality of said triangles are of the same size.

4. The thrust augmentation and backstop structure for a hydrodynamic vehicle hull according to claim 1, wherein said triangle has a hypotenuse closer to the fore of the hydrodynamic vehicle than the hypotenuse closer to the stern of the hydrodynamic vehicle.

5. The thrust augmentation backstop structure for a hull of a fluid craft as claimed in claim 1, wherein said fixed support is a steel structure.

6. The thrust augmentation and backstop structure for a vessel hull according to claim 1, wherein said fixed bracket is welded to said vessel hull.

7. The thrust augmentation backstop structure for a hull of a fluid craft as claimed in claim 1, wherein said asymmetric structure is welded to said fixed support.

8. The thrust-augmenting backstop structure for craft hulls of hydrodynamic craft as recited in claim 1, wherein said asymmetric structure is formed from a single cut of sheet steel.

9. The thrust-increasing backstop structure for a craft hull according to claim 1, characterized in that said asymmetrical structure can also be made by welding several triangular plates.

10. The thrust augmentation and backstop structure for a vessel hull according to claim 1, wherein said fixed bracket can also be attached to said vessel hull by bolts.