采用流体分析软件Fluent,对典型船舶密闭舱室双层底进行二氧化碳气体保护焊接作业时的局部通风风流流场、有害气体CO2及CO浓度场分布进行数值模拟分析,确定有害气体扩散的数学模型。通过设置组分源项的方法利用组分输运方程得出在一定通风量的情况下CO2及CO气体的浓度分布规律,并与实测数据作对比,结果基本一致,由此可根据不同通风条件下确定焊接作业危险区域,为防止CO2集聚和CO中毒采取有效措施提供理论依据。
A commercial CFD software Fluent is used to simulate the airflow and harmful gas distribution in ship's double bottom cell with forcing auxiliary ventilation during carbon dioxide gas welding, the mathematical model for simulation of harmful gas diffusion is established. The distribution pattern of CO2 and CO in a certain amount of ventilation is obtained using species source term, the simulation results fit the model experiment data well. The dangerous areas in welding could be obtained the harmful gas distribution under different ventilation conditions, that provides the basic theory for avoiding CO2 accumulation and CO poisoning.
2016,38(5): 133-137 收稿日期：2016-03-09
DOI：10.3404/j.issn.1672-7619.2016.05.0028
分类号：U671.8
基金项目：船机修造工程交通运输行业重点实验室资助项目(2015KF05);山东省高校科技计划资助项目(J15LN72)
作者简介：徐昆伦(1981-),男,硕士,讲师,研究方向为船舶通风安全技术与安全管理。
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