D142 Extinction limit of flame spread over a solid material in microgravity

Flame spread behaviour of Polydimethylsiloxane (PDMS) membranes in 1 g and µg environments

“…The data from Takahashi et al [31][32][33], only one point coincides with the current data. In the experimental work conducted by Takahashi et al [31][32][33], the sample width tested was either 10 mm or 20 mm.…”

“…The data from Takahashi et al [31][32][33], only one point coincides with the current data. In the experimental work conducted by Takahashi et al [31][32][33], the sample width tested was either 10 mm or 20 mm. As a consequence, their flame spread was three-dimensional in nature and was affected either by side oxygen supply or cooling (threedimensional effect) [34].…”

“…� was used and is based on the an extended simplified theory (EST) developed by Bhattacharjee, Takahashi and co-workers [28,32,50]. The flame temperature (1200 °C) and the pyrolysis temperature (444 °C) were taken from the literature [3,7].…”

“…Figure 4 -Theoretical and experimental flame spread velocities for the 0.125 mm thick PMMA sample as a function of the opposed forced flow velocities. The data is from the current study and from Takahashi et al (2009) [31] , Takahashi et al (2012)[32], andTakahashi et al (2007) [33].…”

Effect of Sample Width on Flame Spread Rate over a Thin Material in Microgravity

“…Hence, we measured the preheat zone length, L g , in the four diluent conditions. Figure 6 shows the images obtained with the interferometer in the each balance condition 18) . It can be seen from these images that the preheat zone length for He is much larger than those at other conditions, even in relatively fast ambient flow.…”