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### 基于激光点热源非稳态传热模型测固体材料热物性参数

1. 1.安徽理工大学 省部共建深部煤矿采动响应与灾害防控国家重点实验室,安徽 淮南 232001
2.安徽理工大学 矿山智能装备与技术安徽省重点实验室,安徽 淮南 232001
3.达姆施塔特工业大学 材料科学学院,德国 达姆施塔特 D-64287
• 收稿日期:2019-08-24 出版日期:2021-04-28 发布日期:2021-04-30
• 作者简介:陈清华(1978-),男,安徽省宿州市人,教授,从事材料热物性学、传热传质学等领域的研究.电话(Tel.):18605548100;E-mail: ahhnds@163.com.
• 基金资助:
国家重点研发计划(2018YFC0807900);国家自然科学基金(51874007);安徽省高等学校自然科学研究重点项目(KJ2018A0080)

### Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model

CHEN Qinghua1,2(), GAO Wei2, SU Guoyong2, GUAN Weijuan1, QIN Ruxiang1, JI Jiadong1,2, MA Yangbin3

1. 1. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China
2. Anhui Key Laboratory of Mine Intelligent Equipment and Technology, Huainan 232001, Anhui, China
3. School of Materials Science, Darmstadt University of Technology, Darmstadt D-64287, Germany
• Received:2019-08-24 Online:2021-04-28 Published:2021-04-30

Abstract:

Based on the laser point heat source unsteady state transfer model, a novel method to gain thermo-physical parameters of isotropic solid materials is proposed. The enantiomorphous heat-source theory is introduced to calibrate the influence of adiabatic boundary on temperature rise of the measuring points, and a mathematical model is established. The thermal conductivity and thermal diffusivity of the material are calculated by numerical solution combined with computer programming, and a thermo-physical testing system is developed. The low vacuum environment in the sample container is obtained by using a vacuum pump. The laser generator emits a laser beam to heat a corner of the sample, and the variation of temperature on the upper surface of the sample measured by the temperature sensor is monitored by the wireless signal transmitting unit. The thermophysical properties of borosilicate glass (Pyrex7740), marble, diatomite firebrick, silica brick, and zirconium brick are comprehensively tested. The results show that the relative deviation between the test values of the first four samples with a relatively low thermal conductivity and the reference value is not more than 2.76%, and the test accuracy is higher. The relative deviation between the test values of the zirconium brick with a relatively large thermal conductivity and the reference value reaches 6.38%, and the test accuracy is lower. Uncertainty analysis of the test system shows that as the thermal conductivity of the tested sample increases, the credibility between the test value and the true value decreases, indicating that the device is more suitable for solid materials with a thermal conductivity less than 3.0W/(m·K).