Ultra-high speed aircraft thermal protection and drag reduction method and system

Abstract

The invention provides an ultra-high speed aircraft thermal protection and drag reduction method and system. The method includes that a cold source is arranged inside the cavity of an ultra-high speed aircraft, a plurality of micropores are arranged in the wall surface of the cavity, and the cold source is ejected out of the micropores in a high-pressure air state under the action of driving force to form an air film on the outer surface of the cavity. The air film can perform thermal protection on the ultra-high speed aircraft, viscous drag of the aircraft with external air can be effectively reduced, thermal barrier is favorably alleviated or eliminated, security of the ultra-high speed aircraft is improved, service life is prolonged, and a good application prospect is achieved. A cold source driving unit comprising an air pump, a cold source storer and a buffer is adopted in the system, the air pump supplies compressed air to the cold source storer during the operation state, the cold source enters the buffer to be vaporized under the action of air pressure, and the air is ejected from the micropores to form the air film under the action of pressure.

Description

technical field [0001] The invention belongs to the technical field of ultra-high-speed aircraft, in particular to a method and system for thermal protection and drag reduction of ultra-high-speed aircraft. Background technique [0002] Ultra-high-speed aircraft refers to aircraft with a flight speed above Mach 5, including rockets, missiles, spacecraft, space shuttles, aerospace aircraft, etc. There are two main problems in the flight process of ultra-high-speed aircraft: (1) when the ultra-high-speed aircraft enters and exits the atmosphere, it faces the problem of air stickiness, which requires a lot of energy to overcome the aerodynamic resistance; The aerodynamic shock wave friction heat generation phenomenon, thermal barrier, in severe cases, can generate thousands of degrees of high-temperature plasma, resulting in communication interruption, this stage is a high-risk period for aircraft. [0003] Regarding air viscosity resistance, current ultra-high-speed aircraft ...

AI Technical Summary

Problems solved by technology

There are two main problems in the flight process of ultra-high-speed aircraft: (1) when the ultra-high-speed aircraft enters and exits the atmosphere, it faces the problem of air stickiness, which requires a lot of energy to overcome the aerodynamic resistance; The aerodynamic shock wave friction heat generation phenomenon, thermal barriers appear, in severe cases, can generate thousands of degrees of high-temperature plasma, resulting in communication interruption, this stage is a high-risk period for aircraft

However, these two methods are difficult to provide thermal protection for a long time, resulting in expensive aircraft needing frequent overhauls or facing the status quo of being eliminated after being used several times

Secondly, it is difficult to control the internal temperature of the aircraft by using these two methods, but the continuous increase of the internal temperature of the aircraft will seriously endanger the safety of the carrying system

In addition, the structure of the relevant protection system is complex and prone to unexpected failures

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