阅读说明：本技术 一种利用局部大角度楔面控制斜爆轰波的楔面结构 (Wedge surface structure for controlling oblique detonation waves by utilizing local large-angle wedge surface ) 是由 张小兵 秦琼瑶 于 2020-04-30 设计创作，主要内容包括：本发明属于斜爆轰发动机领域,具体涉及一种利用局部大角度楔面控制斜爆轰波的楔面结构。该楔面结构在原有平直楔面的基础上增加一个局部大角度楔面,局部大角度楔面诱导更加强烈的斜激波,提供更高的温升,可以将斜爆轰波稳定在局部大角度楔面上。在实际飞行过程中,可根据实际需求改变前楔面、后楔面角度以及局部大角度楔面的位置,从而精准控制斜爆轰波的起爆位置。本发明能够根据实际飞行条件对斜爆轰波的起爆位置进行控制,进而实现推力最大化。(The invention belongs to the field of oblique detonation engines, and particularly relates to a wedge surface structure for controlling oblique detonation waves by utilizing a local large-angle wedge surface. According to the wedge surface structure, a local large-angle wedge surface is added on the basis of an original flat wedge surface, the local large-angle wedge surface induces stronger oblique shock waves, higher temperature rise is provided, and oblique detonation waves can be stabilized on the local large-angle wedge surface. In the actual flight process, the angles of the front wedge surface and the rear wedge surface and the positions of the local large-angle wedge surfaces can be changed according to actual requirements, so that the detonation position of the oblique detonation wave is accurately controlled. The invention can control the detonation position of the oblique detonation wave according to the actual flight condition, thereby realizing the maximum thrust.)

1. A wedge surface structure for controlling oblique detonation waves by utilizing a local large-angle wedge surface is characterized in that the wedge surface structure is additionally provided with the local large-angle wedge surface on the basis of a straight wedge surface.

2. The wedge surface structure of claim 1, further comprising a front wedge surface and a rear wedge surface, wherein two ends of said local wide-angle wedge surface are rotatably connected with said front wedge surface and said rear wedge surface, respectively.

3. The wedge surface structure of claim 2, wherein both ends of said local large angle wedge surface are hinged with said front wedge surface and said rear wedge surface respectively.

4. The wedge surface structure of claim 3, wherein the angle of each of said front and rear wedge surfaces is adjustable.

5. The wedge surface structure of claim 4, wherein a back side of the local large-angle wedge surface and a side surface of the rear wedge surface are connected by a telescopic mechanism; the sliding of the local large-angle wedge surface along the track is realized.

6. The wedge surface structure of claim 5, wherein said retractable mechanism is a spring or a cylinder.

Technical Field

The invention belongs to the field of oblique detonation engines, and particularly relates to a wedge surface structure for controlling oblique detonation waves by utilizing a local large-angle wedge surface.

Background

The inclined detonation engine is the most ideal engine for hypersonic aircrafts. The working principle of the oblique detonation engine is as follows: supersonic incoming flow is impacted and compressed on the wedge surface to form oblique shock waves, the temperature and the pressure are increased and the speed is reduced after the oblique shock waves, and the oblique detonation waves are detonated after the oblique shock waves pass through a section of induction section.

According to the working characteristics of the oblique detonation engine, the wedge face angle cannot be too large, the mixture can be prematurely dissociated due to the too large wedge face angle, the thrust performance is influenced, and meanwhile, the resistance can be increased due to the too large wedge face angle; the wedge angle cannot be too small because the smaller the wedge angle, the lower the post-oblique shock static temperature, and the longer the induction length, which increases the size and thus the weight of the engine. If a straight wedge surface is adopted, the detonation wave is difficult to control by changing the angle of the wedge surface.

Disclosure of Invention

The invention aims to provide a wedge surface structure for controlling oblique detonation waves by utilizing a local large-angle wedge surface, which aims to stabilize the oblique detonation waves at an optimal position through a local large-angle wedge surface angle, and simultaneously has the advantages of minimum resistance and total pressure loss, thereby optimizing the thrust performance.

The technical solution for realizing the purpose of the invention is as follows: a wedge surface structure for controlling oblique detonation waves by utilizing a local large-angle wedge surface is characterized in that the wedge surface structure is additionally provided with the local large-angle wedge surface on the basis of a flat wedge surface.

Furthermore, the wedge surface structure also comprises a front wedge surface and a rear wedge surface, and two ends of the local large-angle wedge surface are respectively and rotatably connected with the front wedge surface and the rear wedge surface.

Furthermore, two ends of the local large-angle wedge surface are respectively hinged with the front wedge surface and the rear wedge surface.

Furthermore, the angles of the front wedge surface and the rear wedge surface are both adjustable.

Furthermore, the back side of the local large-angle wedge surface is connected with the side surface of the rear wedge surface through a telescopic mechanism; the sliding of the local large-angle wedge surface along the track is realized.

Further, the telescopic mechanism is a spring or an air cylinder.

Compared with the prior art, the invention has the remarkable advantages that:

(1) the utility model provides a wedge face has added a local wide-angle wedge face on the basis of original straight wedge face, thereby the wide-angle wedge face can provide the oblique shock wave of sufficient intensity and obtain sufficient temperature rise, under the effect of local wide-angle, oblique detonation wave can continuously be stabilized on local wide-angle wedge face, through the position that changes the wide-angle wedge face, can the detonation position of accurate control oblique detonation wave.

(2) The inclined detonation wave is always stabilized on the large-angle wedge surface through the angle adjustability of the front wedge surface and the rear wedge surface and the sliding of the local large-angle wedge surface on the track, and the thrust maximization is realized.

Drawings

Fig. 1 is a schematic view of a conventional flat wedge surface.

Fig. 2 is a schematic diagram of a wedge surface structure of the present application.

FIG. 3 is a schematic illustration of the wedge surface structure of the present application assembled on an engine.

Fig. 4 is an enlarged schematic view of the wedge surface structure containing a local large angle in the application.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

The invention provides a wedge surface structure for controlling oblique detonation waves by utilizing a local large-angle wedge surface, which stabilizes the oblique detonation waves at an optimal position through a local large-angle wedge surface angle, and simultaneously has the advantages of minimum resistance and total pressure loss, thereby optimizing the thrust performance.

As shown in fig. 2-4, a wedge surface structure for controlling oblique detonation waves by using a local large-angle wedge surface is additionally provided with a local large-angle wedge surface on the basis of a straight wedge surface. The large-angle wedge surface can provide oblique shock waves with enough strength so as to obtain enough temperature rise. Under the action of a local large angle, the oblique detonation wave can be continuously stabilized on the local large-angle wedge surface, and the detonation position of the oblique detonation wave can be accurately controlled by changing the position of the large-angle wedge surface.

The wedge surface structure further comprises a front wedge surface and a rear wedge surface, and two ends of the local large-angle wedge surface are rotatably connected with the front wedge surface and the rear wedge surface respectively.

Two ends of the local large-angle wedge surface are respectively hinged with the front wedge surface and the rear wedge surface.

The angles of the front wedge surface and the rear wedge surface are both adjustable.

The back side of the local large-angle wedge surface is connected with the side surface of the rear wedge surface through a telescopic mechanism; the sliding of the local large-angle wedge surface along the track is realized.

The telescopic mechanism is a spring or an air cylinder.

The wedge surface for detonating the detonation waves is arranged below the combustion chamber, the local large-angle wedge surface is supported by the cylinder, and the local large-angle wedge surface can slide back and forth on the track. And controlling the position of the local large-angle wedge surface according to the actual thrust requirement, so that the detonation position of the oblique detonation wave is controlled to achieve the optimized thrust performance.