Blast wave |
The air wave set in motion by an explosion. |
BLEVE |
Boiling Liquid Expanding Vapour Explosion: An explosion due to flashing of liquids when a vessel with a high vapour pressure substance fails. |
Burning rate |
The amount of fuel consumed by the combustion process per unit time. |
Burning Velocity |
Velocity of the flame front with respect to the unburnt gas immediately ahead of the flame. |
Combustion |
The burning of gas, liquid, or solid in which fuel is oxidised; involves heat release and often light emission. |
Confined Gas Explosion |
Explosion within tanks, process equipment, pipes, in culverts, sewage systems, closed rooms, underground installations etc. |
Deflagration |
A combustion wave propagating at subsonic velocity relative to the unburnt gas immediately ahead of the flame. |
Detonation |
A combustion wave propagating at supersonic velocity relative to the unburnt gas immediately ahead of the flame. |
Dynamic pressure |
The pressure increase that a moving fluid would experience if it was brought to rest by isentropic flow against a pressure gradient. |
Explosion |
An event leading to a rapid increase of pressure. |
Flame Speed |
Velocity of a flame relative to a stationary observer. |
Flash Fire |
A slow deflagration of a premixed, unconfined, unobstructed gas cloud producing negligible overpressure. |
Flash Point |
The minimum temperature at which a liquid fuel gives off sufficient vapour to form a flammable mixture with air, near the surface of the liquid or within the vessel used. |
Gas Explosion |
A process where combustion of a premixed gas cloud is causing rapid increase of pressure. |
GexCon |
CMR's Gas Explosion Consultancy. |
HVAC |
Heat, Ventilation and Air-Conditioning. |
Partly Confined Gas Explosion |
Occurs when a fuel is accidentally released, mixed with air and ignited inside a building which is partly open. |
Pressure |
Stress which is exerted uniformly in all directions. |
Reflected pressure |
Pressure measured when a blast wave hits an object like a wall head-on. |
Side-on pressure |
Pressure measured perpendicular to the propagation direction of a blast wave. |
Stagnation pressure |
The pressure that a moving fluid would have if it was brought to rest by isentropic flow against a pressure gradient. |
Static pressure |
a) The pressure that would exist at a point in a medium if no sound waves were present, or b) the normal component of stress exerted across a surface moving with the fluid, especially across a surface which lies in the direction of the flow. |
Shock Wave |
A fully developed compression wave of large amplitude, across which density, pressure, and particle velocity change drastically. |
Turbulence |
Turbulent flow is characterised by an irregular random fluctuation imposed on mean flow velocity. |
Unconfined Gas Explosion |
A deflagration in an unconfined, unobstructed cloud. |
Vapour Cloud Explosion |
Gas explosion. |
VCM |
Vinyl Chloride Monomer.
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