High resolution numerical simulation of methane explosion in bend ducts

Flame acceleration in pipes containing bends of different angles

“…This may be due to the strongest turbulence in the bend. The numerical results showed that the flame expansion in the bend with a smaller angle underwent a longer process (Wang et al, 2012). Therefore, the explosion flame font will take longer to propagate, and the flame speed will be smaller as a result.…”

“…When the bend had a sharp corner, the reflection and flow turbulence were much stronger (Wang et al, 2012).…”

“…Many research results have revealed this mechanism. Wang et al developed a parallel code and found that the flame front was enlarged along the bend (Wang et al, 2012). Zhang et al found that the plane wave span increased with the bend angle (Zhang et al, 2010).…”

The effect of bend positions on premixed methane–air explosion overpressures in ducts

“…This is consistent with our results. Wang et al 13,14 found that low pressure and rarefaction zone became broader when the bend angle became smaller. Meanwhile, the reflection and turbulence were more intense.…”

“…Additionally, the bend angles in actual process industries can be quite different. Wang et al 13 carried out numerical simulations on the effect of bend angles on premixed methane-air detonation, and the overpressures in and after the bend were compared. Unfortunately, few researchers have studied the effect of bend positions or angles on gas explosions.…”