中文摘要：

为准确测量凝析天然气流量，对低含液率气液两相流条件下槽式孔板的压降相关式进行了实验研究。总结了孔径比为0．50、0．60和0．75的槽式孔板气相压降倍率ФG随Lockhart-Martinelli参数X、气体Froude数Frg和孔径比β变化的规律；将X、Frg和β作为变量对Murdock相关式进行修正，提出了一种新的适用于不同孔径比槽式孔板的压降相关式，并与前人建立的标准孔板压降相关式进行了对比分析。结果表明：对于3种不同孔径比的槽式孔板，所提出的相关式流量计算精度最高，平均相对误差均小于4％。

英文摘要：

For the purpose of accurately measuring flow rates of wet gas, the multiplier correlation for slotted orifice was studied based on experimental data and some theoretical results. Qualitative conclusions about how two-phase multipliers changing with Lockhart-MartineUi parameter, gas Froude number and beta ratio were made for slotted orifices with beta ratios equal to 0.50, 0.60 and 0.75. A new correlation for slotted orifice was put forward, and the performance of existed correlations for the standard orifice plate and the new correlation was compared and analyzed in detail. The proposed correlation shows a more accurate calculation results, and the mean relative errors are all less than 4% for slotted orifice with different beta ratios.