scholarly journals Experimental and Numerical Analysis of Multi-Hole Orifice Flow Meter: Investigation of the Relationship between Pressure Drop and Mass Flow Rate

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7281
Author(s):  
Adam Tomaszewski ◽  
Tomasz Przybylinski ◽  
Marcin Lackowski
Keyword(s):  
Numerical Analysis ◽  
Pressure Drop ◽  
Mass Flow ◽  
Flow Coefficient ◽  
Flow Meter ◽  
Contraction Coefficient ◽  
Single Hole ◽  
Wide Range ◽  
Orifice Flow ◽  
Orifice Flow Meter

The paper presents the results of the experimental and numerical analysis of a six-hole orifice flow meter. The experiments were performed on humid air in a 100 mm diameter duct. The aim of this research was to investigate the mass flow and pressure drop dependency in an orifice of a predetermined shape and to compare the results obtained with computational formulas recommended in the ISO 5167-2 standard for a single-hole orifice flow meter. The experiments and calculations were performed on several multi-hole orifice geometries with different contraction coefficient in a wide range of Reynolds numbers. The pressure was probed immediately upstream and downstream of the orifice. The flow coefficient determined for the six-hole orifice flow meter investigated was compared with the flow coefficient of conventional single-hole orifice with the same contraction coefficient. The results from computational formulas for single-hole orifice from ISO 5167 are also included in the paper. During some experiments, an obstacle has been introduced in the duct at variable distance upstream from the orifice. The effect of the thus generated velocity field disturbance on the measured pressure drop was then investigated. Numerical simulation of the flow with the presence of the obstacle was also performed and compared with experimental data.

scholarly journals Characteristic Analysis of Variable Orifice Flow Meter

2002 ◽  
Vol 2002 (5-1) ◽  
pp. 83-88
Author(s):  
Tatsuya FUNAKI ◽  
Kenji KAWASHIMA ◽  
Toshinori FUJITA ◽  
Toshiharu KAGAWA
Keyword(s):  
Characteristic Analysis ◽  
Flow Meter ◽  
Orifice Flow ◽  
Orifice Flow Meter

Nonadiabatic Condition on the Natural Gas Energy Custody Transfer Using Orifice Flow Meter

MAPAN ◽  
2015 ◽  
Vol 30 (2) ◽  
pp. 77-84 ◽  
Author(s):  
Gunawan ◽  
Harijono A. Tjokronegoro ◽  
Edi Leksono ◽  
Nugraha Nugraha
Keyword(s):  
Natural Gas ◽  
Flow Meter ◽  
Orifice Flow ◽  
Orifice Flow Meter

The Experimental Evaluation of the Performance of Multiphase Flow Meter: Effect of the Distance Between Two Meters

2009 ◽  
Author(s):  
Sang Hyun Park ◽  
Gerald L. Morrison
Keyword(s):  
Reynolds Number ◽  
Pressure Drop ◽  
Experimental Evaluation ◽  
Flow Coefficient ◽  
Base Line ◽  
Flow Conditions ◽  
Flow Meter ◽  
Flow Meters ◽  
Water Cut ◽  
Upstream Flow

In the previous studies of slotted flow meters, the repeatibility and reproducibility were studied under different flow conditions and different configurations. In accordance with these work, the present study examines the affects of the distance between the slotted plate. The preset 5D distance is expanded to the 10D. The flow coefficient, KY, the pressure drop, and the uncertainty analysis dependence upon this change is examined. There are definite changes in the results between the 5D distance and the 10D distance. As a base line, the flow coefficient, KY, showed 0.8% to 2% difference between the 5D and the 10D distance case. Depending upon the upstream flow conditions, the reproducibility of the slotted flow meter was affected. The pressure drop increased as the upstream Reynolds number increases. The result from the analysis of a water cut meter mounted downstream of a slotted flow meter showed that there are definitive relationships between the output of the water cut meter and the parameters of the flow.

An Experimental Investigation of Butterfly Valve Performance Downstream of an Elbow

1991 ◽  
Vol 113 (1) ◽  
pp. 81-85 ◽  
Author(s):  
M. J. Morris ◽  
J. C. Dutton
Keyword(s):  
Experimental Investigation ◽  
Pressure Drop ◽  
Mass Flow ◽  
Performance Characteristics ◽  
Flow Coefficient ◽  
Butterfly Valve ◽  
Operating Characteristics ◽  
Drop Mass ◽  
Torque Coefficient ◽  
Aerodynamic Torque

The results of an experimental investigation concerning the operating characteristics of a butterfly valve downstream of a mitered elbow are reported. Primary emphasis is given the influences of valve disk angle, valve/elbow spacing, and valve/elbow orientation on the dimensionless pressure drop, mass flow coefficient, and aerodynamic torque coefficient characteristics of the valve. The results show that when the valve is located two pipe diameters downstream of the elbow, the performance characteristics are substantially affected by the relative valve/elbow orientation. However, at a spacing of eight diameters the effect of the elbow on the valve operating characteristics is small.

The Determination of Mass Flow in the Vapour-Compression Refrigerator

1935 ◽  
Vol 129 (1) ◽  
pp. 477-505 ◽  
Author(s):  
E. C. Smith
Keyword(s):  
Experimental Determination ◽  
Mass Flow ◽  
The State ◽  
Volumetric Efficiency ◽  
Coefficient Of Performance ◽  
Flow Meter ◽  
Wide Range ◽  
Liquid Portion ◽  
Vapour Compression

The paper describes an experimental determination of the mass flow of refrigerant per minute and refrigerating effect per minute in a vapour-compression refrigerator, when the state of the refrigerant at the exit from the evaporator was varied over a wide range of superheat temperatures and dryness fractions. The usual methods of measuring the flow of liquids in pipes were not suitable for the present work and a special type of flow meter, described in the text, was developed. The results obtained were not as theory would tend to suggest, but were substantially modified by practical conditions, particularly for dryness fractions between 0·97 and 0·87. The volumetric efficiency changed abruptly over this range from a higher to a lower value. The reduction was attributed to the effect of re-evaporation of. the liquid portion of the refrigerant in the compressor during the suction stroke, as it was found that the higher volumetric efficiency was obtained when the refrigerant was superheated throughout most of the delivery stroke, and the lower volumetric efficiency occurred when the state of the refrigerant on entering the compressor resulted in liquid being present in the cylinder at the end of the delivery stroke. The reduction in the volumetric efficiency resulted in a corresponding reduction in the mass flow, the refrigerating effect, and the heat rejected by the condenser per minute, and in the coefficient of performance for dryness fractions ranging between 0·97 and 0·87.

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