Simulation calculation method for evaluating service life of cylindrical anode layer Hall thruster

A technology of Hall thruster and life evaluation, applied in the field of simulation, can solve the problems of inapplicability, high cost and long time of thruster life evaluation method

Pending Publication Date: 2020-02-28
中核同创(成都)科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a simulation calculation method for life evaluation of a cylindrical anode layer Hall thruster, which can solve the current thruster life evaluation method is not suitable for cylindrical anode layer Hall thruster, and use experiments for life evaluation Time-consuming and long-term problems

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  • Simulation calculation method for evaluating service life of cylindrical anode layer Hall thruster
  • Simulation calculation method for evaluating service life of cylindrical anode layer Hall thruster
  • Simulation calculation method for evaluating service life of cylindrical anode layer Hall thruster

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Embodiment approach

[0034] The present invention adopts the numerical simulation simulation method, based on the VORPAL simulation software developed by Tech-X Company of the United States, conducts a comprehensive and accurate modeling analysis of the behavior of electrons and ions in the discharge process, and obtains the ion position, energy and The distribution of the incident angle, and then use the sputtering coefficient formula and the etching rate formula to evaluate the life of the thruster. Specific implementation methods include:

[0035] (1) Use the 3D drawing software AutoCAD or VariCAD to model the 3D geometric structure, obtain the meshed geometric structure model, and save it in STP and STL formats for future use. And the mesh repair is performed on the exported meshed geometric model in STL format.

[0036] (2) Import the 3D geometric model in STP format saved in the first step into the infolytic Magnetic magnetic field simulation software for magnetic field simulation, and obta...

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Abstract

The invention discloses a simulation calculation method for evaluating service life of a cylindrical anode layer Hall thruster. The method comprises the steps of firstly, establishing a three-dimensional geometric model, and obtaining spatial distribution of a three-dimensional magnetic field through magnetic field simulation software; importing the three-dimensional geometric model and the magnetic field data into a particle simulation solver VORPAL to obtain the position, energy and incident angle distribution of incident ions bombarded on the surface of the magnetic pole material; then, considering the characteristics of the cylindrical anode layer Hall thruster, and establishing a sputtering model; obtaining the number of atoms sputtered by an incident ion through a sputtering model according to the distribution of the incident ion energy E0 and the incident angle theta and the energy threshold Ed of the magnetic pole material; and finally, deducing an etching rate expression of the magnetic pole of the thruster according to the etching depth h of the magnetic pole of the thruster and an incident ion quantity conservation formula, and evaluating the service life of the thrusterthrough the distribution of the etching rate.

Description

technical field [0001] The invention belongs to a simulation method, in particular to a simulation method aimed at evaluating the life of a cylindrical anode layer Hall thruster. Background technique [0002] There are two main types of Hall thrusters used in the aerospace field: steady-state plasma thrusters (SPT) and anode layer plasma thrusters (TAL). The biggest difference between the two lies in the length of the acceleration channel and the material of the inner wall of the acceleration channel. The SPT acceleration channel is larger than the TAL, and the inner wall of the acceleration channel is made of insulating materials such as boron nitride. The TAL acceleration channel is shorter and the inner wall of the acceleration channel is made of conductive metal, so there is only a small amount of secondary electron emission, and its secondary electron emission coefficient is much lower than that of SPT. [0003] The cylindrical anode layer Hall thruster belongs to the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/00G06F119/04
CPCG06T17/00
Inventor 赵杰唐德礼耿少飞李平川张帆
Owner 中核同创(成都)科技有限公司
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