Step-down procedure of sonic nozzle calibration at low Reynolds numbers

Lim, Jae-Myoung; Yoon, Bok-Hyun; Jang, Seok Pil; Choi, Hae-Man; Park, Kyung-Am

doi:10.1016/j.flowmeasinst.2010.04.005

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…When the flow is homogeneous, there is considerable influence on discharge coefficient with high inlet relative humidity, which is related to thethermal choking notion. The discharge coefficient deviation reaches 0.275% when the inlet relative humidity isφo=95%, which is comparable to the Lim et al [22] experimental data with accuracy of 0.15%.…”

Section: Mixed Worksupporting

confidence: 85%

“…The results showed that with change of throat diameter from 0.715mm to 2.04 mm the percentage change of flow rate was 0.124% to 0.079%,respectively see Fig (13) and table (4). Lim et al [22] (2010) developed an experimental facility Fig( 14) to study sonic nozzle calibration at low Reynolds numbers and pressures (below atmospheric pressure) in the pressure range 3 Kpa to 600 KPa . Therefore, calibration for a much wider range of flow-rates than thatwasexisting became possible.…”

Section: Experimental Workmentioning

confidence: 99%

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Calibration Nozzle Performance-State of The Art

Shaalan

Kassem

Hagazy

2018

The Egyptian International Journal of Engineering Sciences and

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There has been deep interest by research workers in the metrology scope of sonic nozzle as measuring devices in certain engineering systems (e.g. calibration of gas flow meters, compressor discharge capacity testing and calibration of turbine engine gas passage). The main emphasis has been on how to enhance the accurate measurement of mass flow rate from such devices. Sonic nozzle one obvious solution in this case. Due to simple structure, high accuracy and stable performance.This paper gives an over view of up-to-date published research in the performance and characteristics of sonic nozzles used for calibrating gas flow meters. Some articles were reviewed and examined, covering various aspects of the subject, including the main illustrations and prominent results. The reviewed articles include those concentrating either on experimental, on numerical simulation, on theoretical investigation, or on combination. From discussion of articles there exist a great dependence on body temperature and geometry of sonic nozzle to get more accuratemeasurements .Beside that the back pressure effects on mass flow rate and normal shock in sonic nozzles used in calibration facilities should have more interest of study.Also there is still some room for further work, such as development the effect of geometry and kind of gases on discharge coefficient with deeper insight, to be carried out.

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Section: Mixed Worksupporting

confidence: 85%

Section: Experimental Workmentioning

confidence: 99%

Calibration Nozzle Performance-State of The Art

Shaalan

Kassem

Hagazy

2018

The Egyptian International Journal of Engineering Sciences and

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“…The flow computers can make corrections for Reynolds number effects and changing fluid density, as well as remove non-linearity [16,18]. Because the gas can be compressed, measurement error will occur when the sonic nozzle is operated at a different pressure and temperature.…”

Section: Flow Computersmentioning

confidence: 99%

Flow Measurement and Control in Gas Pipeline System using Intelligent Sonic Nozzle Sensor

Guemana¹,

Aissani²,

Hafaifa³

2011

SIC

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Abstract:In industrials sector, many engineering applications used the intelligent techniques to savings on maintenance costs. In this work, we discuss a new intelligent measurement technique of gas flow, in industrials compressions systems, using a sonic nozzle sensor, and we examine the performance of the calibration and measurement of gas flow used in the transport of high volume of natural gas pipeline system. We propose the development of this approach and we discuss the feasibility and validity of this intelligent sensor in real plant. This work demonstrates that sonic nozzles can be operated successfully as a prover for natural gas and for the critical flow in nozzles for unprocessed natural gas.

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