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Method and device for achieving non-uniform heat flux density distribution through electron beam scanning

A technology of electron beam scanning and heat flux density, applied in the field of electron beam scanning, can solve the problems of difficulty in guaranteeing, the electron beam scanning method cannot achieve non-uniform heat flux density distribution, etc.

Active Publication Date: 2021-04-30
HEFEI ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the electron beam scanning method in the prior art cannot realize non-uniform heat flux distribution and the accuracy of scanning heat flux is difficult to guarantee

Method used

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  • Method and device for achieving non-uniform heat flux density distribution through electron beam scanning
  • Method and device for achieving non-uniform heat flux density distribution through electron beam scanning
  • Method and device for achieving non-uniform heat flux density distribution through electron beam scanning

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Embodiment 1

[0035] Such as figure 1 As shown, it is a schematic diagram of electron beam scanning heating, and its general principle is: the vacuum chamber 1 provides a vacuum environment, the metal wire of the cathode 2 is energized and heated to emit electrons, and is accelerated by the anode 3 to form a high-energy electron beam 4, which is deflected by the focusing magnetic field 5 and After the magnetic field 6 acts, the electron beam 4 is focused to a specified beam spot size and targeted to a corresponding position, and the deflection magnetic field 6 is adjusted so that the beam spot scans rapidly on the target 7 to realize heating, and the target 7 is fixed on the cooling facility 8, The entire vacuum chamber 1 and the cooling facility 8 are mounted on a support frame 9 . The invention provides a method for realizing non-uniform heat flux distribution by electron beam scanning, the method comprising:

[0036] Step 1: Carry out discrete processing of scanning point regularization...

Embodiment 2

[0047] Corresponding to Embodiment 1 of the present invention, Embodiment 2 of the present invention also provides a device for realizing non-uniform heat flow by electron beam scanning, and the device includes:

[0048] The data processing module is used to perform discrete processing of scanning point regularization on the original target heat flux to obtain the target heat flux in discrete form;

[0049] The path planning module is used to plan the scanning path according to the heat flux density characteristics and the geometric characteristics of the scanning area;

[0050] The scanning residence time acquisition module is used to establish the energy balance equations of the scanning heat flux and the target heat flux within a scanning period, and solve the energy balance equations to obtain the scanning residence time of different scanning points;

[0051] The scanning heat flux acquisition module is used to calculate and obtain the scanning heat flux according to the s...

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Abstract

The invention discloses a method and device for achieving non-uniform heat flux density distribution through electron beam scanning. The method comprises the steps: carrying out scanning point regularization discrete processing of an original target heat flux density to obtain a discrete target heat flux density; planning a scanning path according to characteristics of the heat flux density and geometrical characteristics of a scanning area; establishing energy equilibrium equations of the scanning heat flux density and the target heat flux density in one scanning period, and solving the energy equilibrium equations to obtain scanning residence times of different scanning points; and performing calculation according to the scanning path and the scanning residence times to obtain a scanning heat flux density. According to the method and device, advantages that non-uniform heat flux density distribution is achieved and the obtained scanning heat flux density has high precision are realized.

Description

technical field [0001] The invention relates to the technical field of electron beam scanning, and more particularly relates to a method and a device for realizing non-uniform heat flux distribution by using electron beam scanning. Background technique [0002] When the aircraft moves at hypersonic speed, it will have severe friction with the atmosphere, and the wall will be in a high temperature and high heat flux environment. In order to ensure the heat resistance of materials and the reliability of thermal protection measures, it is necessary to develop ground high heat flow and high temperature test technology. The current common technical means include quartz lamp arrays and hypersonic wind tunnels. In hypersonic wind tunnels, the heat source cannot directly heat the material, the energy utilization efficiency is low, and a large amount of gas source is required; while the quartz lamp has a temperature limit and heats the material through radiation. , can not produce a...

Claims

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Application Information

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IPC IPC(8): B23K15/00
CPCB23K15/00
Inventor 叶宏姚鸿鑫郑传懋
Owner HEFEI ENERGY RES INST