An Experimental Study of Flame Spread and Interactions Between Multiple Solid Fuels

• Main Authors: Hung-Chi Wu, 吳鴻奇
• Other Authors: Hsin-Yi Shih
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/35900701626633229821

碩士 === 長庚大學 === 機械工程研究所 === 95 === This thesis presents the flame spread behaviors and flame interactions with multiple solid fuels by measuring the flame spread rates for different arrangements of solid geometry, separation distance between solids and the width of the solids. Six types of solid geometric configurations are investigated, including single solid, two parallel solids, several parallel solids, L shape of solids, n shape of solids, and enclosure type of solids. First, most of the solids the flames spread faster as the solid widths become wider. For parallel solids, the flame spread behaviors are quick different with the single fuel flame due to the flame interactions between solids. The flame spread rate increases as the separation distance between the parallel solids decreases. It is because the flow channeling effect and radiation interactions between flames and solids. The flame spread rate reaches the maximum at an intermediate separation distance and then decreases as the separation distance becomes smaller due to the flow resistance and limited thermal expansion. Less oxygen and less heat release hinder the flame spread rate. Secondly, from L shape to enclosure type solids, the flame spread rates show multiplicative increases. To compare the six types of solid geometry studied, the highest flame spread rate is enclosure type of solids, followed by n shape of solids, several parallel solids, two parallel solids, L shape of solids and single solid.