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Method for processing variable section channel of hall thruster

A technology of a Hall thruster and a processing method, which is applied to thrust reversers, machines/engines, using plasma, etc., to achieve the effects of extending working life, improving corrosion conditions and long life

Inactive Publication Date: 2014-03-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of prolonging the working life of the existing Hall thruster, and to provide a processing method for the variable-section channel of the Hall thruster

Method used

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  • Method for processing variable section channel of hall thruster
  • Method for processing variable section channel of hall thruster
  • Method for processing variable section channel of hall thruster

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Experimental program
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specific Embodiment approach 1

[0011] Embodiment 1: Combining figure 1 and Image 6 Describe this embodiment, the processing method of the variable cross-section channel of the Hall thruster described in this embodiment, which includes the following specific steps:

[0012] Step 1. Carry out the ignition operation of the Hall thruster, and measure the curve of the wall normal erosion velocity c of the discharge channel of the Hall thruster during the time period from the ignition of the engine to the time when the engine cannot be re-ignited;

[0013] Step 2: Obtain the normal erosion velocity c of the wall at different times through simulation and calculation, and establish a one-to-one correspondence data relationship between the normal erosion velocity c and the topography of the wall;

[0014] Step 3: From the curve of the wall normal erosion velocity c obtained in step 1 and the one-to-one correspondence data relationship between the normal erosion velocity c obtained in step 2 and the wall surface t...

specific Embodiment approach 2

[0016] Specific embodiment 2: This embodiment is a further limitation of the processing method of the variable cross-section channel of the Hall thruster described in the first embodiment. The process of establishing the one-to-one correspondence between the normal erosion velocity c and the wall surface topography is as follows: :

[0017] The wall material of the discharge channel of the Hall thruster is continuously peeled off under the action of ion sputtering erosion, and the surface topography continues to evolve during the erosion process, such as Image 6 shown.

[0018] θ=arccos(n·n′) is the angle formed by the ion incident direction and the surface normal direction, n is the unit vector of the surface normal, n′ is the unit vector pointing to the ion beam incident direction; the normal erosion velocity of the surface c is represented as:

[0019] c=qn (1)

[0020] where q is the sputter erosion rate, which is expressed as:

[0021] q = ...

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment further defines the processing method of the variable cross-section channel of the Hall thruster described in Embodiment 2. The sputtering yield Y(E, θ) is:

[0024] Y(E, θ)=Y′(θ)·Y′(E) (3)

[0025] In the formula, Y'(E) is the energy sputtering yield, and Y'(θ) is the angle sputtering yield;

[0026] at this time,

[0027] q = J i · Y ′ ( E ) N · Y ′ ( θ ) · cos θ - - - ( 4 )

[0028] and get:

[0029] c = qn = n ...

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Abstract

The invention relates to a method for processing a variable section channel of a hall thruster and relates to a method for designing the hall thruster. The method can be used for prolonging the working service life of the existing hall thruster and comprises the following specific steps of: step 1, igniting and operating the hall thruster, and measuring a curve of a normal corrosion speed c of a wall surface of a discharging channel of the hall thruster along time change during a time range from igniting of an engine to not igniting and operating of the engine any longer; step 2, performing analog computation to obtain normal corrosion speeds c of wall surfaces at different times, and establishing one-to-one correspondence data relationship between the normal corrosion speed c and wall surface morphology; step 3, obtaining morphology parameters of the variable section channel of the hall thruster according to the curve of the normal corrosion speed c of the wall surface along the time change obtained in the step 1 and the one-to-one correspondence data relationship between the normal corrosion speed c and the wall surface morphology obtained in the step 2; and step 4, processing the section shape of the channel wall of the hall thruster according to the obtained morphology parameters. The method provided by the invention is used for designing the hall thruster.

Description

technical field [0001] The present invention relates to a design method of a Hall thruster. Background technique [0002] Hall thrusters are the most basic type of electric propulsion. A technology that uses electrical energy to heat, dissociate and accelerate the working medium to form a high-speed jet to generate thrust. Compared with chemical propulsion, it has the characteristics of specific impulse, small thrust, repeatable start, light weight and long life, so it can be used for spacecraft attitude control, orbit transfer and lifting, orbit correction, resistance compensation, position maintenance, Repositioning, de-orbit processing, cosmic exploration, and interstellar voyages. With the development of communication satellites in the direction of long life, high mass and high power, the requirements for the power density and life of the thrusters are more stringent. For a satellite with a mission duration of 15 years, the ideal working life of the thrusters is expec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03H1/00
Inventor 宁中喜江晓龙于达仁李鸿刘辉
Owner HARBIN INST OF TECH