scholarly journals Approximate Analytical Solutions For The Transient Mass Loss Rate And Piloted Ignition Time Of A Radiatively Heated Solid In The High Heat Flux Limit

2005 ◽  
Vol 8 ◽  
pp. 445-456 ◽  
Author(s):  
C. Lautenberger ◽  
A. Fernandez-Pello
Keyword(s):  
Heat Flux ◽  
Analytical Solutions ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Ignition Time ◽  
High Heat ◽  
High Heat Flux ◽  
Flux Limit ◽  
Approximate Analytical Solutions ◽  
Piloted Ignition

Approximate analytical solutions for transient mass flux and ignition time of solid combustibles exposed to time-varying heat flux

Fuel ◽  
2018 ◽  
Vol 211 ◽  
pp. 676-687 ◽  
Author(s):  
Junhui Gong ◽  
Yabo Li ◽  
Yixuan Chen ◽  
Jing Li ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Heat Flux ◽  
Analytical Solutions ◽  
Mass Flux ◽  
Ignition Time ◽  
Time Varying ◽  
Approximate Analytical Solutions

Pyrolysis and ignition delay time of poly(methyl methacrylate) exposed to ramped heat flux

2018 ◽  
Vol 36 (3) ◽  
pp. 147-163
Author(s):  
Chunjie Zhai ◽  
Fei Peng ◽  
Xiaodong Zhou ◽  
Lizhong Yang
Keyword(s):  
Heat Flux ◽  
Surface Temperature ◽  
Methyl Methacrylate ◽  
Mass Loss ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Ignition Time ◽  
Heat Fluxes ◽  
Critical Surface ◽  
Poly Methyl Methacrylate

Usually, the constant heat flux is used in the previous studies of polymeric pyrolysis. However, the ramped heat flux may be more realistic under a fire condition. For further understandings of polymer pyrolysis in the early stage of fire, the influences of ramped heat flux on pyrolysis of poly(methyl methacrylate) were experimentally and theoretically investigated. Linearly and quadratically ramped heat fluxes were controlled by the output power of a radiative heater. Surface temperature, mass loss rate, and ignition time were experimentally obtained to explore the thermochemical stability of poly(methyl methacrylate) under ramped heat fluxes. A one-dimensional model was used to predict the pyrolysis process, where kinetic parameters were evaluated by a genetic algorithm. Finally, ignition criteria including critical surface temperature and critical mass loss rate were revisited. We observed that the two ignition criteria give similar ignition time when the heat flux increases fast.

STABLE, CALM, AND HIGH-HEAT-FLUX HEAT REMOVAL USING A POROUS-MICRO-CHANNEL

2017 ◽  
Author(s):  
Tomio Okawa ◽  
Junki Ohashi ◽  
Ryo Hirata ◽  
Koji Enoki
Keyword(s):  
Heat Flux ◽  
Heat Removal ◽  
High Heat ◽  
High Heat Flux ◽  
Micro Channel
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