Influence of position and type of Doppler flow meters on flow-rate measurement in sewers using computational fluid dynamic

2011 ◽  
Vol 22 (3) ◽  
pp. 225-234 ◽  
Author(s):  
Hossein Bonakdari ◽  
Ali Akbar Zinatizadeh
Keyword(s):  
Flow Rate ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Flow Meters ◽  
Doppler Flow

Research on a novel flow rate inferential measurement method and its application in hydraulic elevators

2016 ◽  
Vol 231 (2) ◽  
pp. 372-386 ◽  
Author(s):  
Bing Xu ◽  
Pengpeng Dong ◽  
Junhui Zhang ◽  
Jinjin Yao
Keyword(s):  
Mathematical Modeling ◽  
Flow Rate ◽  
Measurement Method ◽  
Sensitivity Analyses ◽  
Hydraulic Systems ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Test Rig ◽  
Flow Meters ◽  
Inferential Measurement

Measuring and controlling the flow rate is a widely concerned problem in engineering fields. The direct flow rate measurement employing conventional flow meters and the indirect flow rate measurement using speed/position transducers or other particular techniques would result in inevitable pressure drop in hydraulic circuits, more energy consumption for pumping fluid, and higher cost of hydraulic systems. This paper presents a novel flow rate inferential measurement method and its application in hydraulic elevators. Mathematical modeling of the proposed method is deduced. The key component of the hydraulic elevator circuit, a two-stage proportional flow rate valve, is verified by experiments as one of the contributions of this paper. Based on the mathematical modeling and the valve validation test, the feasibility and validity of the proposed method are verified by the experiments performed on a test rig which is designed to imitate work situations of a hydraulic elevator. Moreover, sensitivity analyses of the proposed flow rate inferential measurement method are carried out to find the ways how to improve the accuracy of the proposed method. It is believed that this method can be applied in various engineering devices.

scholarly journals NON-INTRUSIVE METHOD FOR MEASURING WATER FLOW RATE IN PIPE

2017 ◽  
Vol 14 (27) ◽  
pp. 44-50
Author(s):  
K. A. R. MEDEIROS ◽  
C. R. H. BARBOSA ◽  
E. C. de OLIVEIRA
Keyword(s):  
Flow Rate ◽  
Water Flow Rate ◽  
Vibration Measurement ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Flow Meters ◽  
Flow Interruption ◽  
Method Of Measurement ◽  
Metrological Validation ◽  
Water Meters

The transducer most widely used for vibration measurement is the piezoelectric accelerometer. This application has been explored for flow rate measurement, since some studies have verified the narrow correlation between ratio of flow and vibration. The technique consists of measure the vibration induced by the flow in the pipeline, has been considered as promising, in the sense of enabling the development of a sensor that presents advantageous characteristics such as non-intrusiveness, non-invasiveness and reduced cost. This paper shows the method of measurement of flow in pipe based on vibration caused by transit of water, without the need of flow interruption or opening of pipe for installation of water meters. Further are present experimental measurements and metrological validation in laboratory accredited for calibration of flow meters.

Influence of Pipe Roughness on the Performance of Ultrasonic Meters for Flow Rate Measurement

2011 ◽  
Author(s):  
Alcir de Faro Orlando ◽  
Ana Luisa Ferreira ◽  
Jose´ Alberto Pinheiro
Keyword(s):  
Reynolds Number ◽  
Flow Field ◽  
Flow Velocity ◽  
Flow Rate ◽  
Velocity Profiles ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Flow Meters ◽  
Field Distortion ◽  
Pipe Roughness

Ultrasonic flow meters have been recently used for flow rate measurement because they are a non-intrusive device and have the capability of making diagnostics of their performance and flow field distortion between two consecutive calibrations. The available completely developed flow velocity profiles in the literature is discussed in this paper and integrated along the meter ultrasonic path to simulate its performance. It was shown that for Reynolds number up to 1,000,000 and relatively roughness values smaller than ε = 0.00012 the flow is in the hydraulically smooth regime. Also, it was shown that the ratio between the area velocity and the average path velocity (kh) decreases close to centerline and increases close to the wall, when roughness increases.

A Comparison of the Multi-Venturi Meter to Other Low-Loss Fluid Meters

1973 ◽  
Vol 95 (1) ◽  
pp. 142-146
Author(s):  
E. D. Klomp ◽  
G. Sovran
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
High Signal ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Low Loss ◽  
Flow Meters ◽  
General Mass ◽  
Unique Potential

A comparison of the multi-venturi type meter with other fluid meters has been made. A multi-venturi type meter is one having two or more venturis cascaded in such a manner that the discharge plane of smaller venturis is positioned in the throat of larger venturis. Although the concept of venturi cascading dates back to around 1880, its unique potential in general mass-flow-rate measurement applications has not been exploited. The primary advantages of the multi-venturi type meter are that it generates significantly less loss than conventional venturis, particularly at high signal magnifications, and has a much broader flow range. As a result of the latter characteristic, a single multi-venturi meter could be used to replace two or three conventional flow meters in some fluid-metering applications.

Computational Modeling of Flow Rate Measurements Using an Orifice Flow Meter

2018 ◽  
Author(s):  
YiQin Xu ◽  
Daniel Coxe ◽  
Yulia Peet ◽  
Taewoo Lee
Keyword(s):  
Measurement Uncertainty ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Flow Meters ◽  
Commercial Code ◽  
Orifice Flow ◽  
Orifice Flow Meter

This study is concerned with understanding and improvement of mass flow rate measurement uncertainty and errors encountered at low flow rates and start-up in commercially available flow rate measurement devices, such as orifice flow meters. The flow through a typical cylindrical flange-tapped orifice flow meter is modeled computationally so the actual mass flow rate is known a-priori. Empirical predictions from the reading of “virtual” pressure sensors are compared with the actual flow rate and the measurement errors are quantified and analyzed. Commercial code ANSYS-Fluent is compared in this study to the in-house high-fidelity spectral-element solver Nek5000, so that conclusions about the applicability of a commercial code to the calculations of measurement uncertainty in the orifice flow meters can be made.

Invariant method for measuring wet gas flow rate

2021 ◽  
pp. 13-19
Author(s):  
Zhanat А. Dayev ◽  
Gulzhan E. Shopanova ◽  
Bakytgul А. Toksanbaeva
Keyword(s):  
Flow Rate ◽  
Measurement System ◽  
Flow Measurement ◽  
Gas Flow ◽  
Test Results ◽  
Invariant System ◽  
Rate Measurement ◽  
Gas Flow Rate ◽  
Flow Rate Measurement ◽  
Wet Gas

The article deals with one of the important tasks of modern flow measurement, which is related to the measurement of the flow rate and the amount of wet gas. This task becomes especially important when it becomes necessary to obtain information about the separate amount of the dry part of the gas that is contained in the form of a mixture in the wet gas stream. The paper presents the principle of operation and structure of the invariant system for measuring the flow rate of wet gas, which is based on the combined use of differential pressure flowmeters and Coriolis flowmeters. The operation of the invariant wet gas flow rate measurement system is based on the simultaneous application of the multichannel principle and the partial flow measurement method. Coriolis flowmeters and the differential pressure flowmeter are used as the main elements of the system. The proposed measurement system does not offer applications for gases with abundant drip humidity. The article provides information about the test results of the proposed invariant system. The estimation of the metrological characteristics of the invariant system when measuring the flow rate of wet gas is given. The obtained test results of the invariant wet gas flow rate measurement system are relevant for natural gas production, transportation, and storage facilities.

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