Gas flow control method for improving ionization efficiency of Hall thruster

A Hall thruster, gas flow technology, applied in thrust reversers, using plasma, machines/engines, etc., can solve the problems of low ionization efficiency and short neutral gas residence time, and achieve the effect of improving ionization efficiency

Active Publication Date: 2016-08-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of low ionization efficiency caused by the short residence time of neutral gas inside the disc

Method used

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  • Gas flow control method for improving ionization efficiency of Hall thruster
  • Gas flow control method for improving ionization efficiency of Hall thruster
  • Gas flow control method for improving ionization efficiency of Hall thruster

Examples

Experimental program
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Example Embodiment

[0034] Specific implementation mode 1: refer to Figure 2 to Figure 4 , Figures 17 to 20 This embodiment is specifically described. The gas flow control method for improving the ionization efficiency of the Hall thruster described in this embodiment adopts a gas distributor, a guide gas outlet structure, or a gas distributor and a guide gas outlet structure. Both the gas distributor and the guide gas outlet structure are used. It is an annular structure and can enable the gas to have a circumferential velocity component. The gas distributor and the guide gas outlet structure are fixed on the upstream part of the discharge channel. The axis of the gas distributor, the axis of the guide gas outlet structure and the axis of the discharge channel are all coincident. The gas distribution The device is located upstream of the upstream portion, and the guide air outlet structure is located downstream of the upstream portion.

[0035] like Figure 2 to Figure 4 In order to use the ...

Example Embodiment

[0037] Embodiment 2: This embodiment further describes the gas flow control method for improving the ionization efficiency of the Hall thruster described in Embodiment 1. In this embodiment, the gas distributor includes multiple sets of gas distribution chambers 9 and distribution The distributor base 10, the distributor base 10 is a ring structure, the multiple groups of gas distribution chambers 9 are evenly distributed in the circumferential direction of the distributor base 10, and each group of gas distribution chambers 9 includes at least one level of buffers and exhaust holes; The devices are distributed in turn along the axial direction;

[0038] Each stage of the buffer includes at least one air intake hole 9-1 and a buffer cavity 9-2;

[0039] The air intake holes and the buffer cavity are distributed along the axial direction in turn, the air intake hole 9-1 communicates with the buffer cavity 9-2, and the last stage buffer cavity 9-2 is provided with an exhaust hol...

Example Embodiment

[0042] Specific implementation three: refer to Figure 5 to Figure 9This embodiment is described in detail. This embodiment further describes the gas flow control method for improving the ionization efficiency of the Hall thruster described in the second embodiment. In this embodiment, the exhaust holes are arranged on the inner wall and the outer wall of the buffer chamber. Or on the inner wall and the outer wall, the exhaust holes of the multiple groups of gas distribution chambers 9 form at least one row of exhaust holes, each row of exhaust holes is evenly distributed in the circumferential direction of the inner wall or outer wall of the distributor base 10, The axes of the air holes and the exhaust holes on the outer wall are parallel to the transverse plane perpendicular to the axial direction of the gas distributor. The included angle between the axis and the radial direction of the gas distributor is a, and the included angle between the axis of the exhaust hole on th...

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Abstract

The invention discloses a gas flow control method for improving the ionization efficiency of a Hall thruster and relates to the technical field of plasma propulsion. The gas flow control method aims at solving the problem that the staying time of neutral gas in a discharge channel of an existing Hall thruster is too short, and consequently the ionization efficiency is low. A gas distributor or a guiding gas outlet structure or the gas distributor and the guiding gas outlet structure is/are adopted. Each of the gas distributor and the guiding gas outlet structure is of an annular structure and can make gas have the circumferential speed component. The gas distributor and the guiding gas outlet structure are fixed to the upstream portion of the discharge channel. The axis of the gas distributor, the axis of the guiding gas outlet structure and the axis of the discharge channel coincide with one another. The gas distributor is located at the upper portion of the upstream part, and the guiding gas outlet structure is located at the lower portion of the upstream part. By means of the gas flow control method for improving the ionization efficiency of the Hall thruster, the ionization efficiency is effectively improved, and the gas flow control method is suitable for Hall thrusters.

Description

technical field [0001] The invention relates to the technical field of plasma propulsion. Background technique [0002] Electric propulsion has the advantages of high specific impulse, long life, compact structure, small size, and light pollution, so it has gradually attracted the attention and favor of the aerospace industry. Among them, Hall thrusters and ion thrusters are currently the most widely used space electric propulsion devices. The Hall thruster is a functional conversion device that converts electrical energy into kinetic energy of the working fluid by using the joint action of electric field and magnetic field. Part of the electrons emitted by the cathode enter the discharge chamber, and under the joint action of the orthogonal radial magnetic field and the axial electric field Make a circumferential drift pointing to the anode. The drift direction is related to the direction of the electric field and magnetic field. During the drift process, it will collide w...

Claims

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Application Information

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IPC IPC(8): F03H1/00
CPCF03H1/0006F03H1/0087
Inventor 丁永杰魏立秋于达仁李鸿
Owner HARBIN INST OF TECH
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