High-speed moving body microbubble drag reduction structure in water

Abstract

The invention belongs to the drag reduction field of an aircraft body, in particular to a high-speed moving body microbubble drag reduction structure in water. The structure comprises an air pump, anair supply pipeline, an air cavity, a porous ceramic, a multifunctional sensor, an electronic pressure regulating valve, an electronic flowmeter, a control device, an aircraft body and a power unit; the whole structure is symmetrical, the power device is located at the tail of the vehicle, other devices are located in the body of the vehicle, the air pump is connected with the air cavity through the air supply pipeline, the air supply pipeline is a hose, the air supply pipeline is provided with an electronic pressure regulating valve and an electronic flowmeter, the air cavity is in close contact with the porous ceramics, and the porous ceramics has a multifunctional sensor. By means of the drag reduction method of penguin-like micro-bubble group covering the surface of the vehicle, when the acceleration is needed suddenly, the wet area changes little and the manipulation performance is very good during the voyage. The mechanism designed in this paper mainly reduces the surface drag, which is not restricted by the strict size. Moreover, the application of the surface drag reduction will not destroy the original design shape of the vehicle, and can ensure the hydrodynamic characteristics.

Description

technical field [0001] The invention in this paper belongs to the field of drag reduction of flying bodies, and specifically relates to a microbubble drag reduction structure of a high-speed moving body in water. Background technique [0002] Although water and air are both fluids, navigating in water is not like navigating in the air. Since water is much denser than air, although it can improve greater power, it will also bring huge resistance. It is difficult for current materials to meet its strength. So far, there has not been a case of sailing in water that exceeds several times the speed of sound like an airplane, and even 0.1 times the speed of sound underwater is also very difficult. Usually, underwater high-speed flying objects are only tens of meters per second, and the technology of cavitation drag reduction appears. Especially in the last century, the Soviet Union developed the blizzard torpedo, which brought a glimmer of opportunity and dawn to underwater ultra-...

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Problems solved by technology

[0002] Although water and air are both fluids, navigating in water is not like navigating in the air. Since water is much denser than air, although it can improve greater power, it will also bring huge resistance. It is difficult for current materials to meet its strength. So far, there has not been a case of sailing in water that exceeds several times the speed of sound like an airplane, and even 0.1 times the speed of sound underwater is also very difficult. Usually, underwater high-speed flying objects are only tens of meters per second, and the technology of cavitation drag reduction appears. Especially in the last century, the Soviet Union developed the blizzard torpedo, which brought a glimmer of opportunity and dawn to underwater ultra-high-speed navigation

For underwater torpedoes or missiles, use the head cavitator to generate cavitation bubbles and ventilate to the low pressure to finally produce supercavitation covering the missile body, which can reduce drag by up to 90%. However, due to the influence of many factors on supercavitation The area is limited, and it is very easy to lose stability during navigation. It is difficult to achieve effective and reliable manipulation of it. Basically, it is a direct trajectory. For larger navigation objects such as submarines or manned equipment, it is necessary to achieve full coverage of cavitation And keeping it stable is even more difficult, so it is necessary to develop a mechanism that is suitable for large sailing bodies, can sail at high speed underwater, is stable, and can be easily manipulated

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