Effects of oxygen enhancement and gravity on normal and inverse laminar jet diffusion flames
نویسندگان
چکیده
A fire on the Mir space station in 1997 threatened the spacecraft and its crew of six [1]. The fire involved an oxygen jet leaking from a lithium–perchlorate oxygen generator. The fire involved three factors not normally encountered in terrestrial fires: enhanced oxygen, inverse flames (in that the oxidizer is surrounded by fuel), and microgravity. The present work examines some effects of these factors on ethane laminar gas-jet diffusion flames, building on the past work of Refs. [2–6].
منابع مشابه
Effects of Combustible Dust Clouds on the Extinction Behavior of Strained, Laminar Premixed Flames in Normal Gravity
An experimental and numerical study was performed on the interaction of combustible solid particles with atmospheric, strained, laminar premixed methane/air and propane/air flames in normal gravity. The study was conducted in the opposed-jet configuration in which a single flame was stabilized below the gas stagnation plane by counterflowing a mixture against an air jet. Into the flame were see...
متن کاملLaminar Smoke Points of Nonbuoyant Jet Diffusion Flames
The laminar smoke point properties of jet diffusion f lames-the luminous flame length, the residence time, and the fuel flow rate, at the onset of soot emission from the flames--have proven to be useful global measures of the soot properties of nonpremixed flames. These measures provide a means to rate several aspects of sooting properties: the relative tendency of various fuels to emit soot fr...
متن کامل- 4 ’ ” EFFECT OF CF 3 H AND CF 3 Br ON LAMINAR DIFFUSION FLAMES IN NORMAL
Chemical inhibdion of dtiusion flames through addition of halogenatkd “inhibitors is a problem of significant practical and scientific interest. Extensive studies on diffusion flames in microgravity have shown that these flames have significantly different characteristics than those under normal gravity [1,2]. However, the mechanisms through which inhibitors reach the reaction zone to suppress ...
متن کاملAIAA 2000-1078 Shapes of Soot-free Laminar Coflowing Jet Diffusion Flames
The shapes (flame-sheet and luminous-flame boundaries) of steady nonbuoyant round hydrocarbon-fueled laminar-jet diffusion flames in still and coflowing air were studied both experimentally and theoretically. Flamesheet shapes were measured from photographs using a CH optical filter to distinguish flame-sheet boundaries in the presence of blue CO2 and OH emissions and yellow continuum radiation...
متن کاملSimulation of Cup-Burner Flames in Microgravity
The extinction process of cup-burner flames under normal-gravity conditions were previously studied. As the low-speed diffusion flames behave differently in microgravity compared to those on earth, it is important to understand the structure of cup-burner flame and its extinction characteristics under 0g conditions. A numerical study was performed in the present paper using a time-dependent, ax...
متن کامل