论文部分内容阅读
在先前工作基础上,研究了高温气体环境中2.11马赫的轴对称圆形射流超音速核心长度、马赫数轴向衰减和径向分布。实验发现,射流超音速核心长度随环境温度的升高而增加;其增加速率随温度的升高而减小,并渐趋于定值。用已有的引射质量方程解释了这一现象。实验查明,超音速射流在高温气体环境中不会发生“过扩散”。根据实验结果,预测了LD转炉吹炼中氧气射流的超音速核心长度。为调整合适的氧枪枪位提出了理论根据。
Based on the previous work, the length of the supersonic core, axial attenuation and radial distribution of Mach number of 2.11 Mach circular gasjet in hot gas environment were studied. It was found that the length of jet supersonic core increased with the increase of ambient temperature, and its increasing rate decreased with the increase of temperature and gradually became constant. This phenomenon is explained by the existing emissivity equation. Experiments show that supersonic jet does not occur in high temperature gas environment, “over diffusion.” Based on the experimental results, the supersonic core length of the oxygen jet in LD converter blowing is predicted. In order to adjust the suitable oxygen lance position proposed a theoretical basis.