Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model
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 p...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Shanghai Jiao Tong University
2021-04-01
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| Series: | Shanghai Jiaotong Daxue xuebao |
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| Online Access: | http://xuebao.sjtu.edu.cn/article/2021/1006-2467/1006-2467-55-4-471.shtml |
| _version_ | 1818739250247499776 |
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| author | CHEN Qinghua, GAO Wei, SU Guoyong, GUAN Weijuan, QIN Ruxiang, JI Jiadong, MA Yangbin |
| author_facet | CHEN Qinghua, GAO Wei, SU Guoyong, GUAN Weijuan, QIN Ruxiang, JI Jiadong, MA Yangbin |
| author_sort | CHEN Qinghua, GAO Wei, SU Guoyong, GUAN Weijuan, QIN Ruxiang, JI Jiadong, MA Yangbin |
| collection | DOAJ |
| description | 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). |
| first_indexed | 2024-12-18T01:21:51Z |
| format | Article |
| id | doaj.art-ac47aa9178ce49dd91af4113e71154ff |
| institution | Directory Open Access Journal |
| issn | 1006-2467 |
| language | zho |
| last_indexed | 2024-12-18T01:21:51Z |
| publishDate | 2021-04-01 |
| publisher | Editorial Office of Journal of Shanghai Jiao Tong University |
| record_format | Article |
| series | Shanghai Jiaotong Daxue xuebao |
| spelling | doaj.art-ac47aa9178ce49dd91af4113e71154ff2022-12-21T21:25:48ZzhoEditorial Office of Journal of Shanghai Jiao Tong UniversityShanghai Jiaotong Daxue xuebao1006-24672021-04-0155447147910.16183/j.cnki.jsjtu.2020.99.013Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer ModelCHEN Qinghua, GAO Wei, SU Guoyong, GUAN Weijuan, QIN Ruxiang, JI Jiadong, MA Yangbin01. 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, GermanyBased 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).http://xuebao.sjtu.edu.cn/article/2021/1006-2467/1006-2467-55-4-471.shtmllaser point sourcenon-steady state heat transfer modelenantiomorphism heat-source theorysolid materialthermo-physical property |
| spellingShingle | CHEN Qinghua, GAO Wei, SU Guoyong, GUAN Weijuan, QIN Ruxiang, JI Jiadong, MA Yangbin Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model Shanghai Jiaotong Daxue xuebao laser point source non-steady state heat transfer model enantiomorphism heat-source theory solid material thermo-physical property |
| title | Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model |
| title_full | Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model |
| title_fullStr | Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model |
| title_full_unstemmed | Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model |
| title_short | Test of Thermo-Physical Property Parameters of Solid Material Based on Laser Point Heat Source Unsteady-State Heat Transfer Model |
| title_sort | test of thermo physical property parameters of solid material based on laser point heat source unsteady state heat transfer model |
| topic | laser point source non-steady state heat transfer model enantiomorphism heat-source theory solid material thermo-physical property |
| url | http://xuebao.sjtu.edu.cn/article/2021/1006-2467/1006-2467-55-4-471.shtml |
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