کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
168657 | 457945 | 2014 | 4 صفحه PDF | دانلود رایگان |
Explosions may occur owing to thermal and branching effects in combustion processes. The ignition limits of a system are affected by the presence of natural convection, which develops inevitably in terrestrial systems. This work investigates the explosion criterion, through parametric sensitivity, for systems with a Gray and Yang, three-step, non-isothermal branching reaction scheme with natural convection. Ignition is identified with the maximum sensitivity of the non-dimensional temperature rise Tmax′ to the ratio of branching and termination reaction rates (τb/τt)(τb/τt). The effects of self-heating, branching and natural convection on the time to ignition are analysed. A value of dimensionless temperature rise T′=5T′=5 is found to be an appropriate explosion criterion for this system.
Journal: Combustion and Flame - Volume 161, Issue 7, July 2014, Pages 1752–1755