A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS

Bibliographic Details
Main Author:	Tian, Ye
Language:	English
Published:	Case Western Reserve University School of Graduate Studies / OhioLINK 2019
Subjects:	Mechanical Engineering
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=case1554473937988922

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-case15544739379889222021-08-03T07:09:58Z A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS Tian, Ye Mechanical Engineering Recent trends of increasingly tall wood buildings call for further research on the combustion and carbonization of wood. Burning, charring, and smoke characteristics of two common building woods (pine and oak) with different thicknesses (6.35 to 38.1 mm) and moisture contents (0 to 40 %) were investigated in a cone calorimeter under different incident radiant fluxes (25, 35, and 50 kW/m2). Besides the standard cone calorimeter outputs (the heat release rate, time to ignition, and the concentrations of O2, CO, CO2, and smoke), real-time temperature variations in the interior of the specimens were measured by six thermocouples embedded at different depths. The charring rate of the wood was determined by tracking the time when each thermocouple reached 300 ℃. The heat-release rate curve exhibited two peaks at the initial and last flares and a reduced-level charring period in-between, typical of wood burning. The second heat-release rate peak was initiated (abruptly for pine) when the charring wave reached the back side of the wood specimen. Furthermore, computed tomography (CT)-scanning of the specimens, quenched at different times after ignition, revealed the internal structure and yielded the charring rate independently, which was consistent with that obtained from the temperature measurement. With an aim at reducing the risk of fire, this study demonstrates the laboratory-scale methods useful to understand the physical processes taking place in the interior of wood specimens and how they relate to the various burning characteristics of woods. 2019-05-23 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case1554473937988922 http://rave.ohiolink.edu/etdc/view?acc_num=case1554473937988922 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Mechanical Engineering
spellingShingle	Mechanical Engineering Tian, Ye A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS
author	Tian, Ye
author_facet	Tian, Ye
author_sort	Tian, Ye
title	A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS
title_short	A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS
title_full	A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS
title_fullStr	A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS
title_full_unstemmed	A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS
title_sort	study of charring behavior of woods based on internal temperature and ct-scan measurements
publisher	Case Western Reserve University School of Graduate Studies / OhioLINK
publishDate	2019
url	http://rave.ohiolink.edu/etdc/view?acc_num=case1554473937988922
work_keys_str_mv	AT tianye astudyofcharringbehaviorofwoodsbasedoninternaltemperatureandctscanmeasurements AT tianye studyofcharringbehaviorofwoodsbasedoninternaltemperatureandctscanmeasurements
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A STUDY OF CHARRING BEHAVIOR OF WOODS BASED ON INTERNAL TEMPERATURE AND CT-SCAN MEASUREMENTS

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