Method for designing graphite blackbody cavity of high-temperature blackbody radiation source

A technology of graphite black body cavity and black body radiation source, applied in the thermal field, can solve problems such as unfavorable analysis design and poor effect, and achieve the effect of feasible principle, reasonable assumption and good practical effect

Active Publication Date: 2014-10-01
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Problems solved by technology

[0003] The existing high-temperature black body radiation source graphite black body cavity design method has not gone through a theoretical calculation process in the design of the graphite black body cavity end taper, and only estimates based on engineering experience, often the effect is not good, and it is not conducive to further deepening analysis design

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  • Method for designing graphite blackbody cavity of high-temperature blackbody radiation source
  • Method for designing graphite blackbody cavity of high-temperature blackbody radiation source
  • Method for designing graphite blackbody cavity of high-temperature blackbody radiation source

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Embodiment Construction

[0021] In order to better illustrate the technical solution of the present invention, the present invention will be further described through examples below.

[0022] In this embodiment, the graphite blackbody cavity design method of the high-temperature blackbody radiation source is used for such as figure 1 The graphite blackbody cavity of the high-temperature blackbody radiation source shown is designed, and the specific operation steps are as follows:

[0023] step 1: figure 2 It is a part of the graphite black body cavity on the left side of the high temperature black body radiation source, and the length of the graphite black body cavity on the left side of the high temperature black body radiation source is L. Take 2 microelement rings C on the inner wall surface of the tapered section of the left graphite black body cavity of the high temperature black body radiation source 0 and C 1 ; microelement ring C 0 and C 1 The areas on the inner walls of the graphite bla...

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Abstract

The invention relates to a method for designing a graphite blackbody cavity of a high-temperature blackbody radiation source, and belongs to the technical field of thermology. The method comprises the steps as follows: in the aspect of conical end part design of the graphite blackbody cavity, the radiation heat exchange angle factor theory is taken as an analysis tool, the hypothesis that the inner wall surface of the end part of the graphite blackbody cavity and the inner wall surface (including the bottom surface) of the cavity are consistent during radiation heat exchange is proposed, and then relative parameters of cone of the end part of the graphite blackbody cavity are calculated and inferred. The method is practicable in principle, reasonable in hypothesis, good in practice effect and applicable to the design of the graphite blackbody cavity of the high-temperature blackbody radiation source.

Description

technical field [0001] The invention relates to a design method for a graphite blackbody cavity of a high-temperature blackbody radiation source, which belongs to the technical field of thermal science. Background technique [0002] High-temperature black body radiation source is often used in the verification and calibration of radiation thermometers. The temperature range is (800-3000) ° C. Generally, graphite tubes are used as heating elements, and the graphite tubes are heated by low voltage and high current; graphite tubes are double black body cavities. Design, the middle is the target surface (the bottom surface of the black body cavity), which is convenient for the measurement and temperature control of the radiation thermometer. Because the inner wall surface of the end of the graphite black body cavity is close to the cavity mouth, the loss of radiation heat dissipation is large, and the conical design is usually used to reduce the local cross-sectional area of ​​t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00
Inventor 董磊张学聪蔡静张术坤
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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