基于热传导反问题的热扩散系数值的确定-数值分析

IF 1 Q4 ENGINEERING, MECHANICAL Acta Mechanica et Automatica Pub Date : 2022-12-01 DOI:10.2478/ama-2022-0048
A. Adamowicz
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引用次数: 0

摘要

摘要本文讨论了用热传导反方程的解确定固体热扩散率的方法的准确性。为了提高该方法的有效性,提出了一种新的测量数据处理程序。利用数值模型,分析了热扩散率测定方法对试验操作和环境参数变化的敏感性。结果表明,该方法对热激脉冲参数、试样厚度以及对流冷却对其精度的显著影响不敏感。这项工作是在使用所述方法确定材料热扩散率的条件方面得出一般结论的情况下完成的。
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Determination of Thermal Diffusivity Values Based on the Inverse Problem of Heat Conduction – Numerical Analysis
Abstract This paper presents a discussion on the accuracy of the method of determining the thermal diffusivity of solids using the solution of the inverse heat conduction equation. A new measurement data processing procedure was proposed to improve the effectiveness of the method. Using the numerical model, an analysis of the sensitivity of the method of thermal diffusivity determination to changes in operational and environmental parameters of the test was carried out. The obtained results showed that the method was insensitive to the parameters of the thermal excitation impulse, the thickness of the tested sample, and the significant influence of convection cooling on its accuracy. The work was completed with the formulation of general conclusions concerning the conditions for determining the thermal diffusivity of materials with the use of the described method.
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来源期刊
Acta Mechanica et Automatica
Acta Mechanica et Automatica ENGINEERING, MECHANICAL-
CiteScore
1.40
自引率
0.00%
发文量
45
审稿时长
30 weeks
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