Calibration Nozzle Performance-State of The Art | ||||
| The Egyptian International Journal of Engineering Sciences and Technology | ||||
| Article 1, Volume 26, EIJEST, Vol. 26, 2018, November 2018, Page 1-13 PDF (902.34 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eijest.2018.97251 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M Shaalan* 1; F Kassem2; R Hagazy3 | ||||
| 1Faculty of Engineering, Zagazig University, EGYPT | ||||
| 2Volume and Fluid Flow Metrology Laboratory,National Institute of Standards, Giza, EGYPT | ||||
| 3Force and Material Metrology Laboratory, National Institute of Standards, Giza ,EGYPT | ||||
| Abstract | ||||
| 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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