Experimental study of the effect spandrel and horizontal projection on upward flame spread using small-scale model

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Experimental study of the effect spandrel and horizontal projection on upward flame spread using small-scale model

 

Author: Li, Ang
Title: Experimental study of the effect spandrel and horizontal projection on upward flame spread using small-scale model
Degree: M.Sc.
Year: 2012
Subject: Flame spread -- Mathematical models.
Fire testing.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Building Services Engineering
Pages: xvi, 92 leaves : ill. (some col.) ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2551467
URI: http://theses.lib.polyu.edu.hk/handle/200/6920
Abstract: High-rise buildings' fire is becoming the focus point in recent years. Upward flame spread is highly significant to fire safety engineering and it is also mentioned in different countries' building codes. Upward flame spread has been studied using scaled experiments for many years. In recent year, using computational techniques to conduct upward flame spread research is becoming popular. This study focused on the importance of the spandrel height and the horizontal projection width in upward flame spread using groups of small-scale model experiment and computational simulation model. For this project, emphasis was on measuring the temperature of upper room due to upward flame spread with different spandrel heights and the horizontal projection depths. A series of tests was conducted on the small-scale model to investigate the effect of the upper room temperature changed. The data showed that the room temperature decreased about 4% with the height of spandrel increased by 17% in small-scale model. Based on the data obtained from the small-scale model, to decide different height of spandrel and depth of horizontal projection could be determined for future building design. The second phase was to develop a numerical simulation to study the upward flame spread phenomena and to compare the simulation results to the experimental results. The results showed that spandrel height and horizontal projection width had a very significant impact on upward flame spread. The study also showed the experiment and the numerical simulation result agreed well in predicting the room temperature. Therefore, it is practical to use computational technique for future for future the upward flame spread research.

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