Experimental investigation of the vented propane-air explosion characteristics at elevated static activation pressures in a large L/D duct

被引：10

作者：

Zhang, Changshuai ^{[1
]}

Dong, Hongguang ^{[2
]}

Shang, Sheng ^{[1
]}

Zhang, Kai ^{[1
]}

Zhou, Yonghao ^{[1
]}

Gao, Wei ^{[1
]}

机构：

[1] Dalian Univ Technol, Dept Chem Machinery & Safety Engn, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Sch Chem Engn, 2 Linggong Rd, Dalian 116024, Peoples R China

来源：

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2023年 / 176卷

关键词：

Elevated static activation pressure; Propane-air vented explosion; Vented flame; Maximum reduced pressure; Empirical modification prediction model; SIDE VENTING POSITION; PREMIXED METHANE-AIR; SCALE; OVERPRESSURES; DEFLAGRATION; SIZE; GENERATION; OBSTACLES; MIXTURES; BLOCKAGE;

D O I：

10.1016/j.psep.2023.06.076

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The flame behavior and pressure characteristics of vented propane-air explosions at elevated static activation pressures (Pstat) were investigated in a duct with a length-to-diameter (L/D) ratio of 7. The impact of the discharge traction and the coupling effect of the internal flame front and pressure waves on the flame propagation behavior were captured. The effect of increasing Pstat on the vented flame length and width under a fixed vent was weak. The influences of Pstat on the pressure profiles and maximum reduced pressure (Pred) were investigated. The increase of Pstat mitigated the blocking effect of external explosion on Pred and further promoted the discharge pressure drop rate to be controlled within the limit of the discharge capacity of the vent. The formation mechanisms of the two main external pressure peaks were analyzed. For the larger Dv conditions, the sensitivity of high Pstat to the increase of maximum external pressure was higher than that of low Pstat. A modified model of Pred was developed considering the effects of elevated Pstat and vent coefficient KV, which is proved to have a good performance in vented explosion ducts with a large L/D ratio.

引用

页码：945 / 955

页数：11

共 44 条

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