Deflagration

Japanese: deflagration
Deflagration

…There are two types of combustion of gunpowder or explosives. One is detonation, and the other is deflagration. Deflagration is often translated as deflagration in Japan, but combustion that proceeds without the supply of oxygen from the air is called deflagration even if it is not explosive. …

From [Explosion]

…In either case, when detonation occurs, the hot reactive region spreads into the surrounding unreacted region. This propagation can be divided into two types: deflagration and detonation, depending on the type, concentration, and environmental conditions of the combustible material. Deflagration is essentially the same phenomenon as flame propagation in a combustible mixture, and the combustion characteristics such as pressure, density, and temperature are all continuous in front of and behind the flame front, there is almost no pressure change, and the flame travels much slower than the speed of sound. …

*Some of the terminology that mentions "deflagration" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…火薬や爆薬の燃焼には2種類がある。一つは爆ごう(轟)(デトネーションdetonation)であり,他の一つはデフラグレーションdeflagrationである。デフラグレーションは日本では爆燃と訳されることが多いが,空気中の酸素の補給なしに進行する燃焼は爆発的でなくてもデフラグレーションと呼ばれる。…

【爆発】より

…いずれの場合でも,起爆が生ずると高温の反応領域は周囲の未反応領域へ広がっていく。この伝播(でんぱ)形式は可燃性物質の種類,濃度および環境条件によって,爆燃(デフラグレーションdeflagration)と爆ごう(轟)(デトネーションdetonation)の二つに分かれる。 爆燃は本質的には可燃性混合気中の火炎伝播と同じ現象であり,圧力,密度,温度などの燃焼特性はすべて火炎面の前後で連続的で,圧力変化もほとんどなく,また火炎の移動も音速に比べてかなり低い。…

※「deflagration」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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