A thermal diffusivity determination method using thermography: Theoretical background and verification

Zbigniew Perkowski

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A thermal diffusivity determination method using thermography: Theoretical background and verification

机译：热成像的热扩散率测定方法：理论背景与验证

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Theoretical bases of the author's method destined, in a perspective, for isotropic material thermal diffusivity in situ measurements are presented in the work. The method employs the properties of general solution of the heat equation in a situation when convective boundary conditions according to Newton's law of cooling hold on a surface of body and temperature of its surroundings is constant. It was elaborated so as to use data from thermographic measurements of heat propagation on a specimen plane surface which is generated pointwise by a low-power thermal impulse source. The work also includes the illustrative computational example and experimental verification conducted on the cubic specimens of cement mortar and foamed polystyrene.

机译：从角度来看，作者的方法的理论基础旨在进行各向同性材料的热扩散原位测量。该方法利用了根据牛顿冷却定律在身体表面上的对流边界条件并且其周围温度恒定的情况下热方程的一般解的性质。对其进行了精心设计，以便使用由低功率热脉冲源逐点生成的热在样品平面上传播的热像图测量数据。这项工作还包括对水泥砂浆和泡沫聚苯乙烯的立方试样进行的说明性计算示例和实验验证。

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来源
《International Journal of Heat and Mass Transfer》 |2011年第10期|p.2126-2135|共10页
作者
Zbigniew Perkowski;
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作者单位

Opole University of Technology, Civil Engineering Faculty, Physics of Materials Department, Katowicka 48, 45-061 Opole, Poland;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
thermal diffusivity; thermography; measuring noise reduction;

机译：热扩散热成像测量降噪;

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1. THERMOPHYSICAL MEASUREMENTS DETERMINATION OF THE THERMAL DIFFUSIVITY OF MATERIALS BY A NONDESTRUCTIVE EXPRESS METHOD WITH THE USE OF STEP-BY-STEP LOCAL HEATING OF THE SURFACE AND HIGH-SPEED THERMOGRAPHY [J] . D. Yu. Golovin, A. G. Divin, A. A. Samodurov, Measurement techniques . 2019,第8期

机译：热物理测量通过非破坏性快速方法测定材料的热扩散性，利用表面和高速热成像的逐步局部加热来确定材料
2. Approximation of Thermal Background Applied to Defect Detection using the Methods of Active Thermography [J] . Sebastian Dudzik Metrology and Measurement Systems: Metrologia i Systemy Pomiarowe . 2010,第4期

机译：主动热成像方法将热本底近似应用于缺陷检测
3. APPROXIMATION OF THERMAL BACKGROUND APPLIED TO DEFECT DETECTION USING THE METHODS OF ACTIVE THERMOGRAPHY [J] . Sebastian Dudzik Metrology and Measurement Systems: Metrologia i Systemy Pomiarowe . 2010,第4期

机译：主动热成像方法在缺陷检测中的热背景近似
4. LATERAL HEAT FLOW INFRARED THERMOGRAPHY FOR THICKNESS INDEPENDENT DETERMINATION OF THERMAL DIFFUSIVITY IN CFRP [C] . Nilesh Tralshawala, Don Howard, Bryon Knight, Symposium on Quantitative Nondestructive Evaluation . 2008

机译：横向热流红外热成像，用于厚度独立测定CFRP中的热扩散率
5. Determination of Lateral Diffusivity of CFRP Composite Using Active Thermography [D] . Rijal, Manoj. 2018

机译：主动热成像法测定CFRP复合材料的横向扩散率
6. Infrared Thermography as a Method of Verification in Raynaud’s Phenomenon [O] . Lotte Lindberg, Bent Kristensen, Ebbe Eldrup, 2021

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7. Determination of Thermal Diffusivity of Austenitic Steel Using Pulsed Infrared Thermography [O] . Kochanowski K., Oliferuk W., Płochocki Z., 2014

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8. Theoretical Assessment of James' Method for the Determination of Geothermal Wellbore Discharge Characteristics [R] . Karamarakar, M., Cheng, P. 1980

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A thermal diffusivity determination method using thermography: Theoretical background and verification

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