Magnetic field regulation type large-area microcavity discharge plasma micro-thruster for liquid working substances
A technology of magnetic field regulation and microcavity discharge, applied in the direction of using plasma, thrust reverser, machine/engine, etc., can solve the problems of low energy efficiency and low precision of propulsion control, achieve high mass density, save volume and weight, The effect of improving stability
Active Publication Date: 2015-06-10
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology
[0005] The technical problem of the present invention is: to overcome the bottlenecks of traditional micro-cavity discharge plasma micro-thrusters such as low specific impulse, low energy efficiency, and low propulsion control precision, and propose a large-area micro-cavity discharge plasma based on magnetic field modulation Body micro propulsion, through the comprehensive regulation of various external control conditions and the optimal configuration of various new components to achieve high specific impulse, long life and high control precision micro-nano satellite propulsion
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[0019] Such as figure 2 As shown, a magnetic field control type liquid-phase working medium large-area microcavity discharge plasma micro-thruster of the present invention includes a thruster body structure, a permanent magnet 9 and an external power supply module 6; the thruster body structure includes a liquid propellant storage tank 8. Propellant working medium feeding mechanism 7, metal sheet (anode 1, cathode 2), dielectric 3 and Rafal nozzle 4;
[0020] Wherein, the liquid propellant storage tank 8 stores volatile liquid propellants (ethanol, water, etc.), and the working medium feed mechanism 7 includes a micro valve for controlling the flow of the working medium and a capillary injection for atomizing the liquid working medium. Atomizer, which diffuses the liquid propellant into the discharge microcavity and realizes spray treatment. In the space environment, the capillary injection atomizer presses the liquid working medium into the capillary to form a high-speed je...
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A magnetic field regulation type large-area microcavity discharge plasma micro-thruster for liquid working substances is characterized in that a propellant working substance feeding mechanism diffuses a liquid propellant in a liquid propellant storage tank into a discharge microcavity, the discharge microcavity comprises metal sheets and insulation dielectrics, a hole with unequal diameters penetrates through the metal sheets, the insulation dielectrics are clamped between two adjacent metal sheets, and every two adjacent metal sheets form one electrode pair; a Laval-cavity nozzle is formed by the metal sheet at the tail end of the discharge microcavity and the corresponding insulation dielectrics, the insulation dielectrics constitute a contraction section and an expansion section of the Laval-cavity nozzle, an anode metal sheet constitutes the throat part of the Laval-cavity nozzle, and the anode metal sheet and a cathode metal sheet located at an outlet of the expansion section of the Laval-cavity nozzle constitute one electrode pair; at least one electrode pair is arranged at the horizontal section of the Laval-cavity nozzle; an external power supply module provides periodic alternating-current or direct-current high-voltage pulse voltage and is connected to every electrode pair by wires; a ring-shaped permanent magnet is mounted on the outer side of the pipe wall of the discharge microcavity in a sleeving manner.
Description
technical field [0001] The invention relates to a large-area micro-cavity discharge plasma space micro-propulsion based on magnetic field modulation, which is especially suitable for micro-propulsion systems with high integration, low power consumption, precise impulse, and high specific impulse for space micro-spacecraft work needs. Background technique [0002] The urgent need for micro-propulsion technology for space miniaturized platforms stems from the vigorous development of micro-nano satellites in this century. After entering the 21st century, micro-nano satellite networking technology has developed rapidly and become increasingly mature, which enables micro-nano satellites to perform the functions of traditional large satellites while having the advantages of short cycle, low risk, flexible launch methods, and strong scalability . Due to the small size, light weight and small moment of inertia of the micro-nano satellite, the thrust required for satellite orbit an...
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Login to View More IPC IPC(8): F03H1/00
CPCF03H1/0012F03H1/0093F03H1/0081
Inventor 王伟宗姚娜肖林魏福智范达万晓云
Owner CHINA ACADEMY OF SPACE TECHNOLOGY