A gas rocket engine and design method for unmanned aerial vehicles

Abstract

The invention discloses a gas rocket engine for unmanned aerial vehicles and a design method thereof, which comprises an air intake section, a steady flow chamber and a tail nozzle arranged coaxially along the airflow direction; The high-pressure gas cylinders are connected; the tail nozzle includes a contraction section and an expansion section; the contraction section includes a large contraction arc and a small contraction arc. In the present invention, the gas rocket engine is used as the power propulsion device for the unmanned aerial vehicle to take off, which can realize a larger impulse, and can generate a larger thrust in a shorter time, so that the unmanned aerial vehicle can obtain a larger acceleration, so that the launch platform It is short and small, and can meet the requirements of 10-20m / s take-off speed in a short period of time for high-weight UAVs of 100-300kg. In addition, the gas rocket engine uses high-pressure air as the propellant, and high-pressure air can be obtained through a portable air compressor, so the source of propellant is sufficient and economical and environmentally friendly.

Description

technical field [0001] The invention relates to the field of gas rocket engine design, in particular to a gas rocket engine and a design method for unmanned aerial vehicles. Background technique [0002] With the advancement of science and technology, UAV technology is becoming more and more mature, and the demand and scale of UAV use are also increasing. UAVs are also appearing more and more frequently in areas such as emergency rescue and disaster relief, aerial reconnaissance, and unmanned operations. The diversification of demand has also led to the diversification of UAV models, especially fixed-wing UAVs, which can have a long cruise capability and a large carrying capacity, and are favored by people. [0003] Fixed-wing UAVs have high environmental requirements when taking off, especially requiring a suitable length of the runway. When the fixed-wing UAV takes off only by its own power unit, it may require a longer runway to reach the take-off speed due to the small...

AI Technical Summary

Problems solved by technology

[0004] At present, some boosting methods have been put into use, such as the method of using energy storage devices such as springs to boost, but these methods are difficult to achieve a large impulse

There are also some devices that can achieve high impulse, such as some small liquid rocket motors or solid rocket motors, but liquid rocket motors involve complex processes such as liquid propellant injection, atomization, evaporation, mixing and combustion, and liquid propellant The storage and supply of the rocket is also a need to solve the problem, so it has high technical requirements and is relatively difficult to realize; and the solid rocket motor will increase the cost because it cannot be reused.

Images