可燃氣體爆炸型

在爆炸性環境中, 可燃氣體的燃燒模式對於理解至關重要. 其中包括恆壓燃燒, 定容燃燒, 爆燃, 和爆炸.

1. 恆壓燃燒:

這種模式發生在燃燒產物可以消散的開放環境中, 與環境壓力保持平衡. It’s a stable process, 不受壓力波的影響, characterized by a specific speed of 燃燒 that depends on fuel delivery and reaction rates.

2. Constant-Volume Explosion:

Occurring within a rigid container, this ideal combustion often starts locally and spreads. In such a scenario, explosion parameters differ, necessitating a constant-volume approach. 通常, the explosion pressure can be 7-9 times the initial pressure for hydrocarbon gas-air mixtures.

3. Deflagration:

Involves gradual 火焰 acceleration due to confinement or disturbance, leading to a pressure wave. Different from constant-pressure combustion, the pressure wave and flame front move subsonically. It’s a common phenomenon in industrial explosions, often exhibiting a complex wave and zone structure.

4. Detonation:

The most intense form of gas explosion, marked by a supersonic reactive shock wave. For hydrocarbon gas-air mixtures, detonation speeds and pressures can be significantly high.

Understanding these modes is vital for preventing explosions. Deflagration, 尤其, can weaken or intensify into a detonation under certain conditions, so mitigating factors that could accelerate flame propagation is crucial.