flammability limits

flammability limits

[‚flam·ə′bil·əd·ē ‚lim·əts]
(chemistry)
The stoichiometric composition limits (maximum and minimum) of an ignited oxidizer-fuel mixture what will burn indefinitely at given conditions of temperature and pressure without further ignition.
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To further understand the effect of area ratio, we filtered the effect of flammability limits and plotted the spatial distribution of the Damkohler number for all three nozzles at the same equivalence ratio, [phi] = 0.
Caption: FIGURE 3 Classes of refrigerant flammability comparing the lower flammability limits (LFLs) and burning velocity (BV) for various refrigerants.
This configuration results in the widest flammability limits possible because the buoyancy of the hot gases assists flame propagation up the tube.
The rich and lean flammability limits for pure compounds cited in the literature, e.
The first Spacecraft Fire Experiment (Saffire-I) was the beginning of a three-part experiment to be conducted over the course of three flights of Orbital ATKs Cygnus vehicle to investigate large-scale flame spread and material flammability limits in long duration microgravity.
The tube is the same size as Jabbour's (2004) and is slightly smaller than the standard one for flammability limits measurement, i.
The minimum ignition energies (MIE) are generally higher, the lower flammability limits (LFL) are generally higher and the heats of combustion (HOC) are generally lower.
Another important parameter is the ratio of flammability limits.
When flammable gases or vapours are of concern, the tendency to form an explosive mixture with air is quantified by means of the difference between the Upper and the Lower Flammability Limit (in fact, the work of Hekkila tells about Upper and Lower Explosivity Limits, which are assumed to be equivalent to flammability limits) of the substances.
This time duration has been proved to be the most appropriate for flammability limits measurements (Kondo et al.
of Lodz, Poland) and Veyssiere (mechanics and physics, CNRS, France) have collected contributions from fellow scientists and engineers on the topics of combustion chemistry, flammability limits, spark ignition, counterflow twin-flame configurations and flame in a vortex core.
Knowing the ratio of flammability limits allows a decision whether the fuel composition has a broad enough flammability range to support combustion for all operating points of the engine.