氮气发生器周边气幕的研究  

Research on Air Curtain Around Nitrogen Generator

作　　者：陈勇 刘振 张晓红[1] 丁洁 CHEN Yong;LIU Zhen;ZHANG Xiao-hong;DING Jie(Marine Design&Research Institute of China,Shanghai 200011,China;Shanghai Waigaoqiao Shipbuilding Co.,Ltd.,Shanghai 200137,China;Shanghai Marine Equipment Research Institute,Shanghai 200031,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011 [2]上海外高桥造船有限公司,上海200137 [3]中国船舶集团第七〇四研究所,上海200031

出　　处：《船舶》2021年第3期99-106,共8页Ship & Boat

摘　　要：氮气发生器气体泄漏后聚集会形成安全隐患,需要在周边设置气幕,以将其与机舱环境隔离。该文采用数值模拟方法,分析气幕装置出风口风速对氮气发生器周边流场的影响。研究结果表明:气幕装置送风2风速6.5 m/s时,机舱底部处的气幕阻隔效果不佳,气幕装置内部存在气体滞留区域。调整送风2速度至8 m/s时,增加了气幕阻隔效果;同时,调整气幕装置内部中心区域中心高度,可以有效减小涡旋对气幕的影响。The gas accumulation after the leakage of the nitrogen generator may cause the potential safety hazard.It is therefore necessary to set up the gas curtain around the Nitrogen generator to isolate it from the environment of the machinery space.The numerical simulation method is adopted to analyze the infl uence of the wind speed at the air outlet of the air curtain device on the fl ow fi eld around the nitrogen generator.The results show that when the wind speed at the secord air outlet of the air curtain is 6.5 m/s,the air curtain at the bottom of the machinery space has poor isolation effect,leaving the gas hold-up region inside the air curtain device.The isolation effect of the air curtain can be increased by adjusting the wind speed at the secord air outlet to 8 m/s.At the same time,the infl uence of the vortex on the air curtain can be effectively reduced by adjusting the height of the central area inside of the air curtain device.

关 键 词：氮气发生器 气幕 流场 

分 类 号：U664.83[交通运输工程—船舶及航道工程]