Abstract The accurate measurement of gas-liquid flow is becoming increasingly significant in the oil and gas industry. Over-Reading (OR) model is the foundation for the gas-liquid flow measurement using Venturi. In this paper, a new OR model based on the form of Chisholm model for horizontal Venturi has been developed. The relationship between entrainment rate and OR in the throat of Venturi has been considered, which could be linked by the gas-liquid velocity slip. The liquid film thickness and entrainment rate in the throat of Venturi were measured by the conductance probes and cross-correlation method. The laboratory experiments of OR were conducted under the pressures of 0.2–1.4 MPa and at a wider range of Lockhart-Martinelli parameter (XLM:0–1.794). Without piecewise modeling, the relative errors of the new OR model are less than ±5% at the confidence level of 99.1%. The extension of the new OR model has been verified by the published data set of De Leeuw.

中文翻译：

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文丘里气液流动夹带特性及超读模型研究

摘要 气液流量的精确测量在油气工业中变得越来越重要。Over-Reading (OR) 模型是使用文丘里管进行气液流量测量的基础。在本文中，基于 Chisholm 模型形式的水平文丘里管开发了一种新的 OR 模型。考虑了文丘里管喉部夹带速率与 OR 之间的关系，这可能与气液速度滑移有关。文丘里管喉部液膜厚度和夹带率采用电导探针和互相关法测量。OR 的实验室实验是在 0.2-1.4 MPa 的压力和更广泛的 Lockhart-Martinelli 参数（XLM：0-1.794）下进行的。没有分段建模，在 99.1% 的置信水平下，新 OR 模型的相对误差小于 ±5%。新 OR 模型的扩展得到了 De Leeuw 已发布数据集的验证。