Research on different venting performance between flat and curved bursting panels. (May 2020)

• Record Type: Journal Article
• Authors: Jiang, Ziyi; Li, Wei; Liu, Xiumei; Jiang, Fan; Li, Beibei
• Is Part Of: Journal of loss prevention in the process industries. Volume 65(2020)
• Publication Date: 2020-05
• Subjects: Dust explosion venting -- Reduced explosion overpressure -- Structural stiffness -- Synchronization acquisition; Chemical industries -- Safety measures -- Periodicals; 660.2804
• DOI: 10.1016/j.jlp.2020.104134
• Languages: English
• ISSNs: 0950-4230

Abstract

Abstract: There is a noticeable discrepancy in the ability to control reduced explosion overpressure between flat bursting panels and curved bursting panels with the same static activation overpressure. Flat bursting plates were observed to leak at approximately 80% of the static activation overpressure lower than curved bursting plates. A new experimental technique is proposed in our paper. Three different vent areas of flat and curved bursting panels were tested, there was significant difference in structural stiffness between flat bursting panels and curved bursting panels, which is the reason the discrepancy in the ability to control reduced explosion overpressure. The structural stiffness of the flat bursting panels is poorer than that of the other, and a greater deformation of the flat bursting panels occurs under the same load. The membrane stress caused by the explosion overpressure therefore produces a larger value in the flat bursting panels which causes it to open prematurely. Moreover, the smaller the vent area that is, the more significant discrepancy in controlling the reduced explosion overpressure between both bursting panels is. This experimental and theoretical result in our paper provides some useful experience for the method of explosion venting. Highlights: Bursting panels with different mechanical structures have different abilities in the process of explosion venting. As experiments showed, it have been found that reduced explosion overpressure of flat bursting panel is significantly smaller than that of curved bursting panel. Difference in the structure stiffness of different bursting panels is the reason for difference in pressure venting capacity. Dangerous stress of bursting panels venting would be the superposition value of internal stress and load stress. Curved bursting panels have better structural stiffness and opening pressure is closer to the theoretical value.