Deflagração

Deflagração is a term used in pyrotechnics and explosives to describe a rapid burning process. Unlike detonation, which is a supersonic explosion, deflagration occurs at subsonic speeds. This means the reaction front propagates through the material as a wave of heat and mass transfer, rather than a shockwave.

The process of deflagration involves the rapid oxidation of a fuel source, often mixed with an oxidizer. This reaction produces hot gases and a significant increase in pressure. The speed of deflagration is influenced by factors such as the composition of the material, its particle size, confinement, and ambient conditions like temperature and pressure.

In fireworks and other pyrotechnic devices, deflagration is controlled to produce desired visual and auditory effects. The burning rate of different pyrotechnic compositions is carefully engineered to create effects like sustained flames, smoke, or rapid bursts of light and sound. When a pyrotechnic composition deflagrates, the hot gases expand rapidly, pushing against their surroundings.

In some contexts, deflagration can be a dangerous phenomenon, such as in dust explosions or the rapid burning of flammable materials in confined spaces. The rapid production of heat and gas can lead to structural damage and injury. Understanding the principles of deflagration is crucial for safety in industries that handle flammable substances and energetic materials.