Deflagration vs detonation

Question 1

what is deflagration?

Answer 1

• a rapid oxidation reaction generating a low intensity pressure wave of moving gases
• a propagation reaction at the surface of the material (subsonic)

confinement and large surface area may lead to detonation

Question 2

what is detonation?

Answer 2

• supersonic combustion where a shockwave is propagated forward due to energy release in the reaction zone behind it
• pressure wave through material causes a disruptive effect

Question 3

Gun powder/ black powder

Answer 3

deflagrates incompletely –> left with residual carbon
noted use throughout history