Influence of Ambient and Oxygen Temperatures on Fluid Flow Characteristics Considering Swirl-type Supersonic Oxygen Jets
Influence of Ambient and Oxygen Temperatures on Fluid Flow Characteristics Considering Swirl-type Supersonic Oxygen Jets
复制标题
考虑旋流型超音速氧气喷射器时环境温度和氧气温度对流体流动特性的影响
DOI：
10.2355/isijinternational.isijint-2019-030
复制
发表时间：
2019-12
期刊：
影响因子：
--
通讯作者：
Fuqiang Zheng
中科院分区：
文献类型：
--
作者：
Lingzhi Yang;Zeshi Yang;Guangsheng Wei;Yufeng Guo;Feng Chen;Fuqiang Zheng
在提钒转炉炼钢中，由于旋流式氧枪射流不仅能产生轴向力和径向力，而且还能产生切向力，因此，旋流式氧枪被用于改善熔池反应的动力学条件，以获得更高的钒氧化率和更好的钒渣质量。近年来，为了进一步提高氧气射流对熔池的搅拌能力，提出了预热氧气的旋流式超音速射流。为了更好地制定和优化工艺参数，分析了环境温度和氧气温度对旋流式超音速射流行为的影响。采用计算流体力学软件对300 K、1 700 K环境温度和300 K、450 K、600 K氧气温度下旋流式氧气射流的流动特性进行了数值模拟，并与预热射流实验数据进行了部分验证。结果表明，预热氧气提高了中心射流速度，环境温度越高，射流中心长度越长，速度波动越大。在较低的环境温度下，预热温度对芯体长度的影响更为明显。从动力学的角度来看，分子运动得到改善，并且在能量方面，氧气射流的内能可以在较高的环境温度下保存。
In vanadium extraction converter steelmaking, the swirl-type oxygen lance has been applied to improve the dynamic condition of the molten bath reaction to achieve a higher oxidation rate of vanadium and better vanadium slag quality, because the swirl-type jet can generate not only axial and radial forces but also tangential ones. Recently, the swirl-type supersonic jet with preheated oxygen was proposed to further enhance the agitation ability of the oxygen jet on the molten bath. In this study, the effects of the ambient temperature and oxygen temperature on the swirl-type supersonic jet behavior were analyzed to achieve better formulation and optimization of the process parameters. The flow characteristics of swirl-type oxygen jets were simulated by computational fluid dynamics software at 300 K, and 1 700 K ambient and 300 K, 450 K and 600 K oxygen temperature, and partial results were validated against data from a preheating jet experiment. An analysis of the results shows that the centerline jet velocity was increased by preheated oxygen, and at higher ambient temperature, a longer core length was formed and the velocity fluctuation was aggravated. The influence of the preheating temperature on the core length was more evident at lower ambient temperature. From a dynamic perspective, the molecular motion was improved and with respect to energy, the internal energy of the oxygen jets could be preserved at higher ambient temperature.
DOI：
--
发表时间：
1993
期刊：
--
影响因子：
--
作者：
D. Wilcox
通讯作者：
D. Wilcox
DOI：
--
发表时间：
1954
期刊：
--
影响因子：
--
作者：
C. Truesdell
通讯作者：
C. Truesdell
影响因子：
6.8
作者：
Amini, Younes;Mokhtari, Mojtaba;Gerdroodbary, M. Barzegar
通讯作者：
Gerdroodbary, M. Barzegar