Citation

Kim W. J. Japan Soc. Safety Eng. 2018; 57(6): 458-464.

Copyright

(Copyright © 2018, Japan Society for Safety Engineering)

DOI

10.18943/safety.57.6_458

PMID

unavailable

Abstract

In order to evaluate the impact of a gas explosion, it is essential to predict the blast pressure that will cause great damage during a gas explosion. In this paper, we explain a model that can predict the blast pressure more easily than the computational fluid dynamics calculation. In particular, it is stated that the acceleration phenomenon of flame propagation due to the instability of the flame has a great influence on the blast pressure. This is because as the scale of the flame increases, the effect of accelerated flame propagation due to hydrodynamic instability becomes very large. Furthermore, we explain the blast pressure prediction method considering the acceleration phenomenon of flame propagation, and show that the blast pressure at the time of gas explosion can be predicted with high accuracy. [Google Translate]


ガス爆発の影響度評価を行うために，ガス爆発時に大きな被害をもたらす爆風圧を予測することは必要不可欠である．本稿では，数値流体力学計算に比べ爆風圧を簡易的に予測できるモデルについて解説する．特に，火炎の不安定性による火炎伝播の加速現象は爆風圧に大きく影響を与えることを述べる．これは，火炎のスケールが大きくなると流体力学的不安定性による火炎伝播加速の影響が非常に大きくなるためである．さらに，火炎伝播の加速現象を考慮した爆風圧予測手法を解説し，高い精度でガス爆発時の爆風圧を予測できることを示す．

Language: ja

Keywords

爆風圧; ガス爆発; 不安定性; 火炎伝播