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Detonation (from Latin detonare ' to thunder down/forth ') [1] is a type of combustion involving a supersonic exothermic front accelerating through a medium that eventually drives a shock front propagating directly in front of it.
In spark-ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.
Nobel came up with a way to safely detonate nitroglycerin by inventing the detonator, or blasting cap, that allowed a controlled explosion set off from a distance using a fuse. In 1863 Nobel performed his first successful detonation of pure nitroglycerin, using a blasting cap made of a copper percussion cap and mercury fulminate .
In materials science and engineering, ... Some of the more important characteristics are listed below: Sensitivity ... Detonation pressure ...
RDX undergoes a deflagration to detonation transition (DDT) in confinement and certain circumstances. [73] The velocity of detonation of RDX at a density of 1.80 g/cm 3 is 8750 m/s. [74] [page needed] It starts to decompose at approximately 170 °C and melts at 204 °C. At room temperature, it is very stable. It burns rather than explodes.
The phenomenon is exploited in pulse detonation engines, because a detonation produces a more efficient combustion of the reactants than a deflagration does, i.e. giving a higher yields. Such engines typically employ a Shchelkin spiral in the combustion chamber to facilitate the deflagration to detonation transition. [2] [3]
WASHINGTON (Reuters) -U.S. forces carried out airstrikes in Somalia on Saturday targeting a senior Islamic State attack planner and other members of the militant group, killing many of them ...
a small amount of a more powerful secondary explosive, directly in contact with the primary, and called "base" or "output" explosive, able to carry out the detonation through the casing of the detonator to the main explosive device to activate it. Explosives commonly used as primary in detonators include lead azide, lead styphnate, tetryl, and DDNP