A burning velocity
model is necessary to calculate the burning velocities of [H.
Class 2L: lower burning velocity
(BV) Class 2s with burning velocities less than or equal to 10 cm/s (3.
b]/dt) is related to the laminar burning velocity
(SL) and a single fit parameter independent upon the gas composition ([C.
As all of the air for combustion is pre-mixed with the fuel prior to combustion taking place, this increases the burning velocity
and consequently produces a smaller, more compact high-temperature flame than that of an atmospheric burner.
The definition of subclass 2L is that the maximum burning velocity
u] represent maximum temperature and the burning velocity
of the propagated flame in a combustible mixture of organic fuel particles, respectively.
As shown in Table 1, refrigerants that have a burning velocity
(BV) of 10 cm/sec or less, defined by ASHRAE 34, fall into Class 2L.
the nature of the gaseous environment, with the aim of classifying the optical hazard of the atmosphere in terms analogous to the electrical case, and of investigating thoroughly the minimum ignition energy, the auto ignition temperature and the burning velocity
Flammability limits (LFL, UFL) and the laminar burning velocity
are important for the evaluation of the flammable cloud geometry and for its fundamental reactivity.
A compact combustion chamber design incorporates burning velocity
and cooling performance suitable for an engine that emphasizes torque characteristics in the rpm ranges actually used by a 125cc scooter.
(BV) and minimum ignition energy (MIE) are physical properties that can be measured and allow classification of flammable substances.
Addition of an optional 2L subclass to the existing Class 2 flammability classification, which signifies Class 2 refrigerants with a burning velocity
less than or equal to 10 cm/s.