排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Ikuto Nishimura Toshio Mogi Ritsu Dobashi 《Journal of Loss Prevention in the Process Industries》2013,26(2):351-354
It is indispensable to predict the pressure behavior caused by gas explosions for the safety management against accidental gas explosions. In this study, a simple method for predicting the pressure behavior during gas deflagrations in confined spaces was examined. Previously the pressure behavior was calculated analytically assuming laminar flame propagation. However, the results of this method often provide underestimation compared with experimental data. It was known the underestimation intensifies as the scale of explosion spaces becomes larger. On the large scale gas deflagration, flame instability (especially hydrodynamic instability) might be more effective and wrinkles appeared on the flame front. Then, the flame surface area was increased and the propagating flame was gradually accelerated. The ordinary prediction methods led to the underestimation because the propagating flame was assumed to be laminar. In this study, we considered the effect of flame wrinkles caused by flame instabilities. By regarding the flame front as a fractal structure, the flame surface area could be modified. Because a flame surface starts to be wrinkled on a certain flame radius, proper determination of the critical flame radius provided accurate prediction of pressure behavior on a large scale deflagration. In addition, correction of the KG value in a large vessel was discussed. 相似文献
2.
Mori Masanobu Hiratsuka Ikuto Itabashi Hideyuki Nakarai Kenichiro Inui Toru 《Journal of Material Cycles and Waste Management》2022,24(4):1228-1236
Journal of Material Cycles and Waste Management - The radioactive cesium (radio-Cs) released following the Fukushima Daiichi Nuclear Power Plant accident was unevenly distributed in soil, sediment,... 相似文献
1