Supersonic lower jaw air intake duct front blocking cap

Abstract

The invention belongs to the scramjet technology and particularly relates to a supersonic lower jaw air intake duct front blocking cap. The supersonic lower jaw air intake duct front blocking cap is mounted on the head (1) and an air intake duct lip (3) of an aircraft and used for closing and opening an air intake duct cavity (2). The supersonic lower jaw air intake duct front blocking cap comprises a plurality of first adjustment sheets (5), sliding pins (6), connecting rods (7), a plurality of second adjustment sheets (8) and fixing pins (9), wherein the first adjustment sheets (5) and the second adjustment sheets (8) are arranged in an alternately spaced mode; the fixing pins (9) and the sliding pins (6) are arranged on the first adjustment sheets (5) and the second adjustment sheets (8) correspondingly; the sliding pins (6) on the adjacent adjustment sheets are movably connected with the fixing pins (9) through the connecting rods (7); the sliding pins (6) are arranged in sliding grooves of the head (1) of the aircraft and can slide freely in the sliding grooves (4). By using the supersonic lower jaw air intake duct front blocking cap, the problem that an integrated jettisonable front blocking cap threatens an aircraft carrying platform is avoided; meanwhile, the research and development cost can be minimized; the supersonic lower jaw air intake duct front blocking cap canbe repeated used at the research and development stage; and the reliability and safety are improved.

Description

technical field [0001] The invention belongs to the technology of ramjet, and in particular relates to a front blocking cover of a supersonic mandibular air inlet. Background technique [0002] The front plug of the supersonic air inlet is to prevent high-speed air from entering the air inlet when the integral solid rocket ramjet works in the boosting stage. Since the rear end of the intake port is connected to the afterburning chamber of the ramjet engine, the rear end of the intake port is blocked at this time, once the high-speed air passes through figure 1 The entry of the air intake lip 3 into the air intake cavity 2 will cause complex reactions such as air intake surge, resulting in unstable flight of the ramjet aircraft. At the same time, the front end cover of the air intake needs to ensure It can be opened quickly and reliably. [0003] At present, the main structural forms of the mainstream supersonic inlet front plug at home and abroad are the integral throwable...

AI Technical Summary

Problems solved by technology

Since the rear end of the intake port is connected to the afterburning chamber of the ramjet engine, the rear end of the intake port is blocked at this time. Once the high-speed air passes through figure 1 The entry of the air intake lip 3 into the air intake cavity 2 will cause complex reactions such as air intake surge, resulting in unstable flight of the ramjet aircraft. At the same time, the front end cover of the air intake needs to ensure fast and reliable opening

[0003] At present, the main structural forms of the mainstream supersonic inlet front plug at home and abroad are the integral throwable type and the explosive fragile type. When the integral throwable front cover falls off from the aircraft, it may hit the carrier platform and threaten the safety of the carrier platform.

The explosion-fragile type is to blast the front plug into fine ablative particles in the form of pyrotechnic explosion when the ramjet engine is transferred. However, because the development cost of the fragile plug is quite high, the development cost is often as high Millions, the cost is very high

Images