Abstract Venturi tubes are commonly used for wet-gas flow measurement, and the majority of commercial wet-gas flow meters generally include a Venturi tube installed vertically with embedded secondary instrumentation. The presence of the liquid causes an increase in the measured differential pressure and results in the Venturi tube over-reading the actual amount of gas passing through the meter. Most of the research in the literature is focused on the investigation of the over-reading for horizontally oriented Venturi tubes, thus limiting the development of over-reading correlations for vertical installation. An experimental campaign was recently conducted at the TUV SUD National Engineering Laboratory (NEL) high-pressure wet-gas loop, where three Venturi tubes of the same nominal diameter (4”) but different throat to inlet diameter ratio (0.4, 0.6, 0.75) were tested, installed vertically after a blind tee. The results of this experimental campaign are presented in this paper and the effects of various parameters (line pressure, gas Froude number, diameter ratio) on the over-reading are briefly discussed. It is shown that the over-reading correlation included in the ISO/TR 11583:2012 and developed for horizontally oriented Venturis, is not applicable to vertically oriented Venturis. However, if modified, the correlation included in the ISO/TR 11583 is capable of meeting its stated uncertainty limits for the experimental data presented here for vertically installed Venturis.

中文翻译：

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用于湿气流量测量的垂直安装文丘里管：可能对 ISO/TR 11583 进行改进以扩展其适用范围

摘要 文丘里管通常用于湿气流量测量，大多数商用湿气流量计通常包括垂直安装的文丘里管，并带有嵌入式二次仪表。液体的存在会导致测得的压差增加，并导致文丘里管过度读取通过仪表的实际气体量。文献中的大部分研究都集中在对水平方向的文丘里管的过度读数的调查上，从而限制了垂直安装的过度读数相关性的发展。最近在 TUV SUD 国家工程实验室 (NEL) 高压湿气回路中进行了一项实验活动，其中三个具有相同公称直径 (4") 但喉部与入口直径比 (0.4、0.6、0.75) 进行测试，在盲三通后垂直安装。本文介绍了该实验活动的结果，并简要讨论了各种参数（管线压力、气体弗劳德数、直径比）对超读的影响。结果表明，包含在 ISO/TR 11583:2012 中并为水平方向的文丘里管开发的重读相关性不适用于垂直方向的文丘里管。但是，如果修改，则 ISO/TR 11583 中包含的相关性能够满足此处针对垂直安装文丘里管的实验数据规定的不确定性限制。直径比）对泛读进行了简要讨论。结果表明，包含在 ISO/TR 11583:2012 中并为水平方向的文丘里管开发的重读相关性不适用于垂直方向的文丘里管。但是，如果修改，则 ISO/TR 11583 中包含的相关性能够满足此处针对垂直安装文丘里管的实验数据规定的不确定性限制。直径比）对泛读进行了简要讨论。结果表明，包含在 ISO/TR 11583:2012 中并为水平方向的文丘里管开发的重读相关性不适用于垂直方向的文丘里管。但是，如果修改，则 ISO/TR 11583 中包含的相关性能够满足此处针对垂直安装文丘里管的实验数据规定的不确定性限制。