工程科学学报，第37卷，第10期：1370-1375,2015年10月 Chinese Journal of Engineering,Vol.37,No.10:1370-1375,October 2015 DOI:10.13374/j.issn2095-9389.2015.10.018:http://journals.ustb.edu.cn 弥散供氧流动特性及其富氧效果 刘应书2》，祝显强》，曹永正1》，杨雄四，刘文海” 1)北京科技大学机械工程学院，北京1000832)北京科技大学治金工业节能减排北京市重点实验室，北京100083 3)江苏吴泰气体设备科技有限公司，丹阳212300 ☒通信作者，E-mail:kindy-yang@163.com 摘要研究了大空间局部圆形出氧口弥散供氧流动特性及其富氧效果.弥散供氧轴向最大速度和氧气轴向最大浓度均随 轴向距离增加而衰减，且在轴向x=0~0.6m范围内具有很大速度梯度和浓度梯度.不同出流速度下弥散形成的富氧区域形 状是相似的，较小管径下富氧区域下游的浓度轮廓更接近“半椭圆”形，弥散范围更大：拟合得到富氧区域外边界扩展半宽度 随轴向距离变化的关系式及富氧面积随出流流量变化的关系式·相同流量的富氧采用双出氧口弥散形成的富氧面积比单出 氧口弥散形成的富氧面积减少约10%：相同流量的官氧以6mm管径弥散形成的富氧面积比8mm管径的富氧面积增加约 10% 关键词供氧：弥散：流动特性：富集 分类号TQ116.14 Flow characteristics and oxygen-enriched effect of oxygen diffusion LIU Ying-shu,ZHU Xian-qiang,CAO Yong-zheng,YANG Xiong,LIU Wen-hai 1)School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Beijing Key Laboratory for Energy Saving and Emission Reduction of Metallurgical Industry,University of Science and Technology Beijing,Beijing 100083.China 3)Jiangsu Oxtek Air Equipment Technology Co.Ltd.Danyang 212300,China Corresponding author,E-mail:kindy_yang@163.com ABSTRACT This article reports the flow characteristics and oxygen-enriched effect of round outlet oxygen diffusion at a large space. Experimental results show that the axial maximum velocity and oxygen concentration of oxygen diffusion both decrease with axial distance,and there are large velocity and oxygen concentration gradients within an axial direction range of 0 to 0.6m.The oxygen- enriched regions are similar at different outflow velocities and their concentration profiles are closer to a semi-elliptical form by a smal- ler outlet diameter at the downstream,which contributes to forming a much larger oxygen-enriched region.A relation between the extended half-width of outer boundary enriched area and the axial distance and a relationship between the oxygen-enriched area and the outflow rate are obtained through function fitting.The oxygen-enriched area formed by dual outlet oxygen diffusion approximately decreases 10%than that by single outlet oxygen diffusion with the same outflow rate:the oxygen-enriched area formed by 6 mm- diameter outlet oxygen diffusion increases about 10%compared to 8mm-diameter outlet oxygen diffusion. KEY WORDS oxygen supply:diffusion:flow characteristics:enrichment 氧气是人体新陈代谢过程中的关键物质，维持工适应了这样的空气环境，如果处于一个氧体积分数低 作和生活环境中氧气量，是人体生命健康的第一需 于20.9%的环境中，就会出现不同程度的缺氧症状， 要四.空气中正常的氧体积分数为20.9%，人类已经 称为氧饥饿.人体对短时氧饥饿或长时间氧饥饿都会 收稿日期：201406-30 基金项目：国家自然科学基金资助项目(51306017)：北京市自然科学基金资助项目(3144032)工程科学学报，第 37 卷，第 10 期: 1370--1375，2015 年 10 月 Chinese Journal of Engineering，Vol． 37，No． 10: 1370--1375，October 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 10． 018; http: / /journals． ustb． edu． cn 弥散供氧流动特性及其富氧效果 刘应书1，2) ，祝显强1，3) ，曹永正1，3) ，杨 雄1) ，刘文海1) 1) 北京科技大学机械工程学院，北京 100083 2) 北京科技大学冶金工业节能减排北京市重点实验室，北京 100083 3) 江苏昊泰气体设备科技有限公司，丹阳 212300  通信作者，E-mail: kindy_yang@ 163． com 摘 要 研究了大空间局部圆形出氧口弥散供氧流动特性及其富氧效果． 弥散供氧轴向最大速度和氧气轴向最大浓度均随 轴向距离增加而衰减，且在轴向 x = 0 ～ 0. 6 m 范围内具有很大速度梯度和浓度梯度． 不同出流速度下弥散形成的富氧区域形 状是相似的，较小管径下富氧区域下游的浓度轮廓更接近“半椭圆”形，弥散范围更大; 拟合得到富氧区域外边界扩展半宽度 随轴向距离变化的关系式及富氧面积随出流流量变化的关系式． 相同流量的富氧采用双出氧口弥散形成的富氧面积比单出 氧口弥散形成的富氧面积减少约 10% ; 相同流量的富氧以 6 mm 管径弥散形成的富氧面积比 8 mm 管径的富氧面积增加约 10% ． 关键词 供氧; 弥散; 流动特性; 富集 分类号 TQ116. 14 Flow characteristics and oxygen-enriched effect of oxygen diffusion LIU Ying-shu1，2) ，ZHU Xian-qiang1，3) ，CAO Yong-zheng1，3) ，YANG Xiong1)  ，LIU Wen-hai 1) 1) School of Mechanical Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Beijing Key Laboratory for Energy Saving and Emission Ｒeduction of Metallurgical Industry，University of Science and Technology Beijing，Beijing 100083，China 3) Jiangsu Oxtek Air Equipment ＆ Technology Co． Ltd． ，Danyang 212300，China  Corresponding author，E-mail: kindy_yang@ 163． com ABSTＲACT This article reports the flow characteristics and oxygen-enriched effect of round outlet oxygen diffusion at a large space． Experimental results show that the axial maximum velocity and oxygen concentration of oxygen diffusion both decrease with axial distance，and there are large velocity and oxygen concentration gradients within an axial direction range of 0 to 0. 6 m． The oxygen￾enriched regions are similar at different outflow velocities and their concentration profiles are closer to a semi-elliptical form by a smal￾ler outlet diameter at the downstream，which contributes to forming a much larger oxygen-enriched region． A relation between the extended half-width of outer boundary enriched area and the axial distance and a relationship between the oxygen-enriched area and the outflow rate are obtained through function fitting． The oxygen-enriched area formed by dual outlet oxygen diffusion approximately decreases 10% than that by single outlet oxygen diffusion with the same outflow rate; the oxygen-enriched area formed by 6 mm￾diameter outlet oxygen diffusion increases about 10% compared to 8 mm-diameter outlet oxygen diffusion． KEY WOＲDS oxygen supply; diffusion; flow characteristics; enrichment 收稿日期: 2014--06--30 基金项目: 国家自然科学基金资助项目( 51306017) ; 北京市自然科学基金资助项目( 3144032) 氧气是人体新陈代谢过程中的关键物质，维持工 作和生活环境中氧气量，是人体生命健康的第一需 要［1］． 空气中正常的氧体积分数为 20. 9% ，人类已经 适应了这样的空气环境，如果处于一个氧体积分数低 于 20. 9% 的环境中，就会出现不同程度的缺氧症状， 称为氧饥饿． 人体对短时氧饥饿或长时间氧饥饿都会