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Influence of the hole Chamfer on the Characteristics of a multi-hole orifice Flowmeter

Fluid Dynamics & Materials Processing 2019年第4期15卷 391-401页

作者： Caizhe Hao Xiaoming Song Zhining Jia Chengde Petroleum College Hebei Instrument&Meter Engineering Technology Research CenterHebei Instrument&Meter Industry Technology Research InstituteChengde067000China

In order to analyze the influence of the hole chamfer on the metering performances of a multi-hole orifice Flowmeter and optimize the related orifice structure,a multi-hole orifice flowmeter with DN80 and throttle ratio of 0.45 was considered in the present *** flow field characteristics were determined in the framework of a CFD *** results show that the multi-hole orifice flowmeter with filleting transition around the throttle orifice has higher accuracy in a wide range of the space of parameters,and is more suitable for accurate measurement of fluid in process control.

关键词： multi-hole orifice differential pressure chamfer CFD simulation

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Experimental investigation of key parameters pertinent to multi-hole orifice throttling characteristic

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Journal of Harbin Institute of Technology(New Series) 2008年第1期15卷 9-12页

作者：赵天怡张吉礼 School of Municipal and Environmental Engineering Harbin Institute of Technology School of Civil and Hydraulic Engineering Dalian University of Technology

This study firstly defines a set of arrangement rule for perforated holes of multi-hole orifice(MO), and then presents three critical geometrical parameters including total number of performated hole, equivalent diameter ratio and distribution density of perforated holes, which are to quantify MO structure. This paper built the throttling test apparatus for nice test MO plates, which were designed according to orthogonal theory. The experiments were conducted to investigate the effect of three critical geometerical parameters on the pressure loss coefficient of test MOs. Results show that equivalent diameter ratio is the dominant prameter affecting MO throttling characterstic.

关键词： experiment orthogonal design multi-hole orifice error analysis

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Experimental study of a simple pressure loss coefficient model for multi-hole orifice

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Journal of Harbin Institute of Technology(New Series) 2008年第3期15卷 399-403页

作者：赵天怡张吉礼 School of Municipal and Environmental Engineering Harbin Institute of Technology School of Civil and Hydraulic Engineering Dalian University of Technology

A throttling experiment for the multi-hole orifice （MO） using water was conducted based on the conclusion of key parameters affecting the MO throttling performance. Testing MOs and standard orifice plates （ SO ） were designed for the throttling experiment to compare the throttling effect using the equivalent diameter ratio （RED） and diameter ratio （RD ） as key parameters, respectively. Meanwhile, effective metrical conditions were provided for experimental accuracy. The throttling model form was determined according to the theoretical throttling model of SO. Then the unknown parameters involved were identified by experimental data. A good concordance between the modeling computation and experimental results shows a validation of the MO throtting model.

关键词： experiment modeling multi-hole orifice pressure loss coefficient

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