A study on the obstacle-induced variation of the gas explosion characteristics
| Autor: | Song Eun Lee, JinJun Kim, Kyu-Hyung Oh, Hwang-Jin Kim |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Waste management
Turbulence Chemistry General Chemical Engineering Detonation Energy Engineering and Power Technology Mechanics Management Science and Operations Research Gas concentration Pressure sensor Industrial and Manufacturing Engineering Control and Systems Engineering Obstacle Flame propagation Gas explosion Deflagration Safety Risk Reliability and Quality Food Science |
| Zdroj: | Journal of Loss Prevention in the Process Industries. 14:597-602 |
| ISSN: | 0950-4230 |
| DOI: | 10.1016/s0950-4230(01)00054-7 |
| Popis: | A study on the variation of the gas explosion characteristics caused by the built-in obstacles was conducted in enclosed/vented gas explosion vessels. It has been well known that the obstacles in pipes and long ducts would accelerate the flame propagation, and cause the transition from deflagration to detonation. In this study, the explosion characteristics and the flame behavior of vented explosions and constant-volume explosions were investigated. Experiments were carried out in a 270-liter and 36-liter hexahedron vessels filled with LPG–air mixture. The explosion characteristics of the gas mixture were determined by using a strain-responding pressure transducer. The flame behavior was recorded by using a high-speed video camera. The shape and the size of the obstacle, and the gas concentration, were adjusted in the experiments. It can be seen from the experimental results that, instead of being accelerated, the flame propagation inside the explosion vessel is decelerated by the plate obstacles fixed at the bottom of the vessel. Also, the characteristics of the enclosed explosion are not so affected by the built-in obstacles as those of the vented explosion are. It is believed that the eddy-induced turbulence behind the obstacle decelerates the flame propagation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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