What is the difference between detonation and deflagration?

In its most benign form, a deflagration may simply be a flash fire. In contrast, a detonation is characterized by supersonic flame propagation velocities, perhaps up to 2,000 metres per second (4,500 mph), and substantial overpressures, up to 2 megapascals (290 psi).

What is detonation in fire?

A detonation occurs when the flame velocity reaches supersonic speeds above 600 m/s and generally in the 2000-2500 m/s range. Peak overpressures can be 20–100 times the initial pressure, with typical values of 20 bar.

What is deflagration fire?

A deflagration occurs when a flame front propagates by transferring heat and mass to the unburned air–vapor mixture ahead of the front. The combustion wave travels at subsonic speeds to unburned gas immediately ahead of the flame front.

What is the difference between deflagration and detonation quizlet?

What is the difference between deflagration and detonation? Deflagration is characterized by very rapid oxidation that produces heat, light, and a subsonic pressure wave. Detonation is characterized by extremely rapid oxidation that produces a supersonic shockwave.

What does deflagration mean in English?

Deflagration is an explosion in which the speed of burning is lower than the speed of sound in the surroundings. A detonation generates greater pressures and is more destructive than a deflagration. A deflagration is a fire in which a flame travels rapidly, but at subsonic speed, through a gas.

Is a deflagration and explosion?

Deflagration (Lat: de + flagrare, “to burn down”) is subsonic combustion propagating through heat transfer: hot burning material heats the next layer of cold material and ignites it. Most “fires” found in daily life, from flames to explosions such as from black powder, are deflagrations.

How does deflagration occur?

Deflagrations and Detonations A deflagration occurs when a flame front propagates by transferring heat and mass to the unburned air–vapor mixture ahead of the front. The combustion wave travels at subsonic speeds to unburned gas immediately ahead of the flame front.

What is the difference between a high explosive and a low explosive quizlet?

What is the difference between low explosives and high explosives? Low explosives are explosives with a velocity of detonation less than 1,000 meters per second. High explosives are an explosive with a velocity of detonation greater than 1,000 meters per second.

What are the two classes of high explosives What is the difference between the two classes?

Detonating explosives, such as TNT and dynamite, are characterized by extremely rapid decomposition and development of high pressure, whereas deflagrating explosives, such as black and smokeless powders, involve merely fast burning and produce relatively low pressures.

What is the difference between deflagration and conflagration?

is that conflagration is a large fire extending to many objects, or over a large space; a general burning while deflagration is the act of deflagrating; an intense fire; a conflagration or explosion specifically, combustion that spreads subsonically via thermal conduction.

What is a deflagrating spoon used for?

Deflagration spoons are stainless steel spoons used for heating substances until they burn away.

Why is detonation more efficient than deflagration?

Detonation combustion burns a given unit of fuel tens of thousands of times faster than deflagration. This creates pressure spikes with 10 to 1 fluctuations. Deflagration, by contrast, produces a smooth flow field into the turbine with a fraction of a percent variation in pressure and mass flow rate.

What is the difference between combustion and explosion?

While combustion is a chemical process, which is carried out to produce heat and chemical species. In combustion process an oxidant reacts with a fuel to produce heat. The difference between detonation and explosion is, detonation is a type of explosion, which produces a supersonic shock wave in front of it.

What does deflagration mean?

Deflagration is a term describing subsonic combustion propagating through heat transfer; hot burning material heats the next layer of cold material and ignites it. Most “fire” found in daily life, from flames to explosions, is deflagration.

What is deflagration potential?

Deflagration potential describes the potential of a given material or substance to deflagrate . The term “deflagration” refers to any form of combustion (e.g. fire, explosion) that spreads at subsonic speeds.