Drvna industrija, Vol. 70 No. 4, 2019.
Izvorni znanstveni članak
https://doi.org/10.5552/drvind.2019.1817
Investigation of Temperature Fields in the Air Environment above Wood Subjected to Thermal Degradation
Elena Pivarčiová
; Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Manufacturing and Automation Technology, Zvolen, Slovakia
Štefan Barcík
; Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Manufacturing and Automation Technology, Zvolen, Slovakia
Jaroslava Štefková
; Technical University in Zvolen, Faculty of Wood Sciences and Technology, Institute of Foreign Languages, Zvolen, Slovakia
Emil Škultéty
; Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Manufacturing and Automation Technology, Zvolen, Slovakia
Sažetak
The paper deals with the visualization of thermal fields above the sample body while observing thermal loading of wood. Via holographic interferometry, thermal fields were visualized in a non-contact manner and the values were recorded in 0, 3, 7 and 15 minutes or earlier in case of degradation. In real time, the ongoing processes were recorded in the thermal boundary layer above the surface of sample bodies in dimensions of 43 mm × 40 mm × 10 mm of beech wood in three different directions: longitudinal, radial, tangential cut. The temperatures of isothermal curves above the heated samples and coefficients of heat transfer α were determined by a quantitative analysis of holographic interferograms. The heat transfer coefficient α ranged within 4.6-7.4 W/m2K. The simulation of heat transfer for the selected samples was prepared by the Fluent programme. Consequently, the measured values from the experiments were compared with the calculated values. There is a correlation between the measured and calculated values.
Ključne riječi
temperature fields; beech wood; interferogram; holographic interferometry; heat transfer coefficient
Hrčak ID:
229756
URI
Datum izdavanja:
13.12.2019.
Posjeta: 1.269 *