緩燃(英語:Deflagration)是釋放能量的兩種方式之一[1],是以傳熱方式、低於音速地緩慢燃燒,日常絕大部份火災皆屬緩燃,低於音速的爆炸亦屬緩燃。[1]另一種釋放能量的方式稱爆轟,兩種方式都有俗稱「爆燃」造成混淆。

火爐裡的火在緩燃。

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  1. ^ 1.0 1.1 Detonation and Deflagration: What Is The Difference?. Safetell Security, U.K. [2020-06-11]. (原始内容存档于2020-06-11). DETONATION is a quick and explosive form of fire. [...] DEFLAGRATION is a slow catching fire. Ordinary fire and most explosions are instances of deflagration. Deflagration fires are usually controllable and can be harnessed.[...] Combustion takes different forms. When a decomposition reaction or combination reaction releases a lot of energy in a very short span of time, an explosion may occur. Deflagration and detonation are two ways energy may be released. If the combustion process propagates outward at subsonic speeds, it’s a deflagration. If the explosion moves outward at supersonic speeds, it’s a detonation."