flame speed

flame speed

[′flām ‚spēd]
(chemistry)
The rate at which combustion moves through an explosive mixture.

flame speed

The rate of propagation of a flame through a gaseous fuel-and-oxidizer mixture relative to a fixed reference point.
References in periodicals archive ?
To consider the effect of pressure and temperature variation within the domain this empirical model of laminar flame speed was used.
In the SI units, thanks to the high octane ratings and flame speed, alcohols such as ethanol or methanol allow to improve engine thermal efficiency while reducing knock tendency [4,5], generally resulting in lower regulated emissions [6].
The start of control is passed to the turbine from "speed zero" to safe operating speed by supplying the right amount of fuel to establish the flame speed in a way that minimizes the fatigue cycle down.
Engine speed also contributes to cycle to cycle variation in combustion, where increasing the engine speed resulted in an increase in flame speeds and cyclic flame speed variations.
Both inventors of the aviation gas turbine--Hans von Ohain in Germany and Frank Whittle in England--first resorted to hydrogen fuel with its more forgiving high flame speed, before they solved liquid fuel combustion problems.
This includes extinction behaviour (how easy it is to blow out the flame), flame speed and stability; type and quantity of emissions; fuel droplet evaporation; and reignition at low temperatures.
Furthermore, the flammability ranges do not take into account the role of turbulence (congestion) on flame speed, which is the main element responsible for the likelihood and severity of an explosion [3].
damp] is damper closing time (linear drive reaction time), S is distance between a possible initial explosion place and a damper building place (flame path); v is flame speed.
Compressed Ni-Ti powder cylindrical samples for are used to investigate the flame speed and effective thermal conductivity over a range of initial sample porosities.
CHEMKIN-PRO can also perform multi-zone modeling to replicate operating conditions in various regions of the cylinder to optimize ignition, flame speed and emission levels.
The flame speed is a function of pressure, temperature, equivalence ratio and diluent ratio.