Active load reduction structure of aircraft

Abstract

The invention relates to an active load reduction structure of an aircraft. The active load reduction structure comprises an aircraft head, an aircraft middle section, an aircraft tail section, an airinjection rectifying valve, an air injection on-off valve and a high-pressure air cylinder. The air injection rectifying valve is located in the center area of the aircraft head and is a device for injecting uniform high-pressure air. The air injection on-off valve is located on the rear portion of the air injection rectifying valve, is connected with the air injection rectifying valve and the high-pressure air cylinder, controls on-off of air flow and is directly controlled by an aircraft air injection control system. The high-pressure air cylinder is positioned at the rear part of the air injection on-off valve and stores all high-pressure air required for generating a supercavity. The supercavitation technology is applied to load shedding in the high-speed underwater entry process of the aircraft, so compared with a traditional buffer head cap and a load shedding head type load shedding technology has a more excellent supercavitation technology load shedding performance. High-pressure compressed air serves as an air source, so compared with fuel gas injection load reduction, the structure is more compact and smaller and is more suitable for being applied to small and medium-sized underwater vehicles.

Description

technical field [0001] The invention relates to the field of aircraft high-speed water entry load reduction, in particular to an aircraft active load reduction structure. Background technique [0002] Underwater vehicles will inevitably go through the water entry process after rocket-assisted flight or aircraft launch. The water entry process is a transient process with fast speed and short time, during which a huge impact load will be generated on the aircraft. If some technical means are not used to reduce the load, it will cause obvious or potential damage to the shape, structure and components of the aircraft. [0003] Supercavitation technology is a very effective load reduction method. Russia first proposed the concept of an underwater supercavitating vehicle. By enclosing the vehicle in cavitation, the vehicle is isolated from the water, thereby greatly reducing the resistance of the vehicle's underwater navigation. The basic principle of supercavitation drag reduc...

AI Technical Summary

Problems solved by technology

This method takes advantage of the characteristics of the missile itself to carry fuel and obtains local materials, which can provide protection for the missile entering the water at high speed; however, when it is applied to an underwater vehicle, it is necessary to place a complete set of gas generation and injection systems inside the already very compact vehicle. The resulting weight, space, and performance costs are unacceptable

Images