Abstract Among various differential pressure flow meters, the orifice meter has gained its publicity in applications where cost, space, and ease of maintenance are of high priority. A major problem associated with the use of orifice flow meters at low Reynolds number flows is the significant variation of discharge coefficient (Cd) as a function of orifice geometry and the Reynolds number. In this work, a two-dimensional axisymmetric numerical model was applied to the investigation of viscous, incompressible flow through square-edged concentric orifice plate for the purpose of studying the performance of discharge coefficient consequent to variations of Reynolds number (Re), orifice/pipe diameter ratio (β), and orifice thickness ratio (t*). The analysis of numerical results by means of multiple regression method has yielded a new correlation incorporating the effect of the parameters under study on orifice meter discharge coefficient for orifice bore Reynolds numbers (Reo)

中文翻译：

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低雷诺数下方边同心孔板流量系数的新综合关联式

摘要 在各种差压流量计中，孔板流量计在成本、空间和维护方便等方面的应用中得到了广泛的关注。在低雷诺数流量下使用孔板流量计的一个主要问题是流量系数 (Cd) 作为孔板几何形状和雷诺数的函数的显着变化。在这项工作中，二维轴对称数值模型应用于通过方边同心孔板的粘性不可压缩流动的研究，目的是研究因雷诺数 (Re)、孔口 /管径比 (β) 和孔板厚度比 (t*)。