Assessment of chlorine leak dispersion around Gebeng industrial area and potential evacuation route
Assessment of chlorine leak dispersion around Gebeng industrial area and potential evacuation route
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DOI：
10.1016/j.atmosres.2018.10.003
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发表时间：
2019-02
影响因子：
5.5
通讯作者：
W. P. Law;Norliyana Erain;N. I. Ramli;J. Gimbun
中科院分区：
文献类型：
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作者：
W. P. Law;Norliyana Erain;N. I. Ramli;J. Gimbun
本文采用计算流体动力学（CFD）方法，对马来西亚葛城工业区周边地形和风况对氯泄漏扩散的影响进行了评价。风速和风向的实际数据是从当地气象站获得的。湍流流动采用尺度自适应模拟（SAS）模型，氯分散采用物种输运方程建模，并与有害大气区域位置（ALOHA）模型进行比较。将模拟结果与激光多普勒风速测量（LDA）在缩小地形模型上的测量结果进行了比较。计算结果与LDA测量结果吻合较好。结果表明，地形、风向和风速对氯的分散有综合影响。住宅区R1和住宅区R2分别在6 - 9月和11 - 1月受到氯泄漏的影响。在7.2 m/s以上的风速下，烟羽迅速到达居民区，但危险区缩小了约50%。在平坦地形情况下，CFD的预测结果与ALOHA的预测结果一致，而在复杂地形情况下，CFD的预测效果更好。本研究结果可为氯泄漏危险区的估计提供有用的指导，并可用于规划安全疏散程序。
This paper evaluates the effect of topographical and wind condition on the dispersion of chlorine leaks around Gebeng industrial area Malaysia using a computational fluid dynamics (CFD). The actual data on wind speed and direction was obtained from a local weather station. The turbulent flow was resolved using a scale-adaptive simulation (SAS) model, whereas the chlorine dispersion was modelled using the species transport equation and compared with the area location of hazardous atmosphere (ALOHA) model. The simulation was compared with the laser doppler anemometry (LDA) measurement on a scaled-down terrain model. A good agreement between the CFD prediction and LDA measurement was obtained. The finding showed that the terrain surface, wind direction and wind speed have a combined effect on the dispersion of chlorine. Residential areas R1 and R2 are affected by the chlorine leak during June to September and November to January, respectively. The plume reached the residential area rapidly under the wind speed above 7.2 m/s but the hazard zone is reduced about 50%. CFD prediction agrees with that of ALOHA in the case of flat terrain, whereas CFD provide a better prediction for the case involving complex terrain. The finding in this work may provide a useful guide to estimate the risk zone from a hypothetical chlorine leak which can be used to plan the safety evacuation procedure.