CN201296358Y - Wing-in-ground effect craft wing - Google Patents

Abstract

The utility model discloses a wing-in-ground effect craft wing, in particular to a wing-in-ground effect craft wing for generating aerodynamic force for a wing-in-ground effect craft so that the wing-in-ground effect craft can take off from a water surface and can fly in the sky. The wing-in-ground effect craft wing comprises a wing body and is characterized in that the front edge of the wing body is flat and is perpendicular to the medial axis of a craft body, the width of a wing root is larger than that of a wing top, and the wing body is in an S shape. The wing-in-ground effect craft wing has light weight and low production cost and can lower the operation difficulty of a driver.

Description

WIG boat wing

technical field

The utility model relates to a wing. Specifically, it is the wing of the WIG craft that is used to generate aerodynamic force for the WIG craft and realize the takeoff of the WIG craft from the water surface and flight in the air.

Background technique

It is known in the shipbuilding industry that WIG boat is a kind of aircraft, and its wing is a traditional structure, and the wing surface of this traditional structure is a flat surface. When the wing-in-ground effect boat is flying, because the airflow flows around the wing from front to back, negative pressure is formed on the upper wing surface, and positive pressure is formed on the lower wing surface to generate lift. The total lift point is the aerodynamic center of the wing. When at high altitude, the aerodynamic center is at 25% of the average aerodynamic chord length of the wing, and when flying close to the ground/water surface, its aerodynamic center is at 50% of the average aerodynamic chord length of the wing. That is to say, the change range of the aerodynamic center of the wing is 25% of the average aerodynamic chord length of the wing. Since the total weight and the position of the center of gravity of the wing-in-ground effect ship will not change suddenly during flight, the change of the aerodynamic center of the wing will cause The moment of lift of the wing around the center of gravity varies greatly. During the flight of the wing-in-ground effect ship, the wings must achieve the moment balance of the whole ship. Only by making the total moment zero can the wing-in-ground effect ship fly smoothly. Otherwise, the hull will be affected by external forces and change its state. That is to say, the moment of wing lift around the center of gravity needs to have a balance moment of equal magnitude and opposite direction. This balancing moment is provided by the flat tail. The balance moment also needs to change correspondingly to make the wing-in-ground effect ship in a balanced state when flying. Therefore, the variation range of the moment to be provided by the horizontal tail needs to be consistent with the variation range of the moment produced by the wing, which requires a large range of variation in the magnitude of the lift produced by the horizontal tail. In this way, not only the area of the horizontal tail is required to be large, but also the area of the movable rudder surface on the horizontal tail is also required to be large, so that the requirement of changing the lift can be achieved by manipulating the rudder surface. The large area of the horizontal tail and movable rudder surface will not only increase the weight and production cost of the wing, but also increase the driver's manipulation difficulty.

Utility model content

The problem to be solved by the utility model is to overcome the deficiency of the background technology and provide a wing of a WIG boat. The wing of the wing-in-ground effect boat is not only light in weight and low in production cost, but also reduces the driver's manipulation difficulty.

In order to solve the above problems, the following technical solutions are adopted:

The wing of the WIG boat of the utility model includes a wing body. Its characteristic is that the front edge of the wing body is straight and perpendicular to the central axis of the hull, the width of the wing root is larger than that of the wing tip, and the centerline is S-shaped.

Adopting the above scheme has the following advantages:

Because the front edge of the wing body of the wing-in-ground effect boat of the utility model is straight and perpendicular to the central axis of the hull, the width of the wing root is greater than that of the wing tips, and the center line is S-shaped. The moving range of the aerodynamic center of the wing can be effectively controlled. According to calculations, the moving range of the aerodynamic center is only 10%, which is far smaller than the 25% moving range in the background technology. Due to the small movement range of the aerodynamic center, the variation range of the moment around the center of the wing-in-ground effect vehicle generated by the lift of the wing is also greatly reduced. A reverse moment is balanced, and another reverse moment is formed around the center of the WIG craft by the lift generated by the horizontal tail. Therefore, the utility model can greatly reduce the moment change provided by the flat tail, greatly reduce the area and structural weight of the flat tail, and reduce the production cost. And because the area of the flat tail is less, the active rudder surface area on the flat tail is also small, thereby reducing the driver's manipulation difficulty.

Description of drawings

Fig. 1 is a schematic diagram of the wing structure of a wing-in-ground effect boat of the present invention;

Fig. 2 is a schematic sectional view of A-A of Fig. 1;

Fig. 3 is a schematic diagram of cooperation between the wings of the WIG and the hull of the WIG of the utility model.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the wing of the wing-in-ground effect boat of the present invention includes a wing body 1, and the leading edge 2 of the wing body 1 is straight and perpendicular to the central axis of the hull 6. The trailing edge 4 is gradually inclined forward from the wing root 3 to the wing tip 5, so that the width of the wing root 3 is greater than that of the wing tip 5, so that the wing body 1 is trapezoidal. As shown in the figure, the centerline of the wing body 1 is S-shaped. In this way, the moment change provided by the flat tail can be greatly reduced, the area and structural weight of the flat tail can be greatly reduced, and the production cost can be reduced. Because the area of the flat tail is small, the active rudder surface area on the flat tail is also small, thereby reducing the driver's manipulation difficulty.

Claims (1)

1. the ground effect ship wing comprises wing body (1); The leading edge (2) that it is characterized in that wing body (1) is flat and perpendicular to the axis of hull (6), and its wing root (3) width is greater than the wing (5) slightly, and its center line is S-shaped.

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