本文介绍著者对底吹转炉氧枪——等截面喷管的实验研究结果。根据实验和分析,文中提出了计算等截面喷管平均摩擦系数、气流流量及冲击力的公式。在实验和处理实验数据的过程中发现喷管出口气流的马赫数大于1,而不是一般理论上所说的等于1。文中分析了产生这种现象的原因,除按实际现象提出上述计算公式之外,并与一般理论的公式进行了比较。 This article describes the author of the bottom blowing oxygen lance - equal cross section nozzle experimental results. According to the experiment and analysis, the formula of calculating the average friction coefficient, flow rate and impact force of equal section nozzle is put forward. It was found during experiments and processing of experimental data that the Mach number of the nozzle exit airflow was greater than 1, rather than what is generally theoretically equal to one. The paper analyzes the reasons for this phenomenon, in addition to the actual phenomenon of the above formula, and the general theory of the formula were compared.