Study on Distance Effect to Vertical Flame Spread over PMMA

AbstractSome previous experimental studies has reported width effect for upward flame spread rate on thermally thin materials. But less of study on different distance. This study concerned about this topic by performing experiments using 2mm thick, 85mm width and 200mm tall PMMA slabs with distances 2mm, 7mm, 13mm, 19mm and 25mm to wall. Data were taken to show the flame spread characteristics of thin materials burning on different distances to wall. The data include flame height, pyrolysis height, flame spread rate and flame acceleration factor (FAF). Results showed that the ratio of flame height and pyrolysis height reduced linear and as constant when the distance is 7mm, the biggest rate is 13mm and the smallest rate is 2mm. When the distance is 13mm, the flame spread rate is bigger than the others, and 25mm is second to 13mm, the smallest is 2mm. The FAF is between -1.0 and 1.0