本文介绍了在气水双相试验台上进行的国产四头内螺纹管中流动特性的试验情况。经对试验数据的分析、整理,绘制了两张流型图,并导出了计算摩擦阻力和截面含汽率等经验公式。 This paper presents the experimental results of the flow characteristics of a domestic four-headed female pipe made on a gas-water two-phase test bench. After analyzing the test data, two flow patterns were drawn and drawn, and the empirical formulas for calculating the frictional resistance and the steam content in the cross section were deduced.