CAJ | 학술논문

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%.
연구료대공간국부원형출양구미산공양류동특성급기부양효과.미산공양축향최대속도화양기축향최대농도균수축향거리증가이쇠감，차재축향x=0~0.6 m범위내구유흔대속도제도화농도제도.불동출류속도하미산형성적부양구역형상시상사적，교소관경하부양구역하유적농도륜곽경접근“반타원”형，미산범위경대；의합득도부양구역외변계확전반관도수축향거리변화적관계식급부양면적수출류류량변화적관계식.상동류량적부양채용쌍출양구미산형성적부양면적비단출양구미산형성적부양면적감소약10%；상동류량적부양이6 mm관경미산형성적부양면적비8 mm관경적부양면적증가약10%.
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.