Hall thrusters suitable for working in a wide parameter range

Abstract

A Hall thruster suitable for working in a wide parameter range belongs to the field of aerospace electric propulsion technology. The invention aims to solve the problem that the current Hall thruster does not have high-performance and stable working ability under the condition of a wide parameter range. The ceramic channel of the Hall thruster of the present invention is a channel with a continuously variable cross-section, and the ceramic channel starts from the top surface of the anode with an expansion half angle of 7.1° and extends continuously from the inside to the outside of the channel; the peak value of the magnetic field intensity is adjusted by using a flexible magnetic circuit The axial position, and then control the position where the ionization occurs to adapt to different flow conditions of the working fluid: when the flow rate of the working medium is low, adjust the ionization to occur in the area where the width of the variable cross-section channel is narrow and the density of the working medium gas is high, so as to meet the full The lower limit of the ionization flux density; when the flow rate of the working fluid is high, adjust the ionization to occur in the area where the channel width of the variable section is wide and the gas density of the working fluid is moderate, which not only ensures the sufficient ionization of the working fluid, but also avoids the local wall thermal load overload big.

Description

technical field [0001] The invention belongs to the technical field of spaceflight electric propulsion, and relates to the technology of optimizing the performance of a Hall thruster through the cooperation of a ceramic channel structure and a magnetic circuit. Background technique [0002] The Hall thruster is the most widely used space electric propulsion technology in the world. It is an energy conversion device that uses the combined action of electric and magnetic fields to convert electrical energy into kinetic energy of working fluid. It has the advantages of simple structure, high specific impulse, high efficiency, long working life, high power density, long service time in orbit, etc. It is suitable for attitude control, orbit correction, orbit transfer, power compensation, position maintenance, Repositioning, off-orbit processing, deep space exploration and other tasks have become one of the most effective means for countries all over the world to reduce the total ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current Hall thruster does not have high performance and stable working ability under the condition of wide parameter range, and to provide a Hall thruster suitable for working in a wide parameter range

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