Which term describes very rapid combustion that can occur with flames and sparks?

Deflagration is the term that specifically refers to a type of combustion that occurs at subsonic speeds, characterized by the generation of flames and sparks. This rapid combustion often produces a noticeable flame front and is typically associated with lower-energy reactions compared to other explosive phenomena. In deflagration, the heat from the reaction is sufficient to ignite surrounding material, leading to a rapid but not supersonic propagation of flame.

Understanding deflagration is essential for EOD personnel, as it can occur in various scenarios involving energetic materials, such as when handling munitions or other combustible substances. This knowledge aids in assessing risks and ensuring safe handling procedures to prevent dangerous combustion incidents.

The other terms, while related to combustion or explosive activity, do not accurately capture the nuances of very rapid combustion involving flames and sparks as deflagration does. An explosion, for instance, refers to a much more energetic and often supersonic reaction that results in a shock wave, which is distinct from the lower-energy reaction of deflagration. Ignition implies the initiation process of combustion but does not specifically pertain to the rapid nature of the combustion itself. Burning is a broad term that encompasses various forms of combustion, lacking the specific context of rapidity and flames characteristic