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Measurement of fundamental discharge coefficients
IEE Colloquium on Advances in HV Technology, 1996For the quantitative assessment and prediction of insulation discharge properties, one requires knowledge of quite a range of quantities referred to in the title as “discharge coefficients”. Their determination may require a variety of techniques, but one always needs a model of the discharge-preferably a simple one.
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2015
The discharge coefficient is required to measure flow using a differential-pressure meter. This chapter considers the discharge-coefficient equation for orifice plates: its history, some older equations, the database collected mostly in the 1980s and the analysis.
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The discharge coefficient is required to measure flow using a differential-pressure meter. This chapter considers the discharge-coefficient equation for orifice plates: its history, some older equations, the database collected mostly in the 1980s and the analysis.
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The discharge coefficient of effervescent atomizers
Experimental Thermal and Fluid Science, 2010Abstract The paper contains the results of experimental investigation of air–water atomization process in effervescent nozzles with internal mixing. The aim of study was analysis of pressure drop and discharge coefficient. The study was carried out at liquid flow rates changed from 0.0014 to 0.011 [kg/s] and gas flow rates from 0.00015 to 0.0065 [kg ...
M. Ochowiak +2 more
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2015
Four ASME (PTC 6) flow nozzles were manufactured together with upstream and downstream pipework in two pipe sizes. Throat and wall tappings were used. The flow nozzles were calibrated in water and in high-pressure nitrogen at 20 and 60 barg. The wall-tapping data are in excellent agreement with the discharge-coefficient equation in ISO 5167-3:2003: all
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Four ASME (PTC 6) flow nozzles were manufactured together with upstream and downstream pipework in two pipe sizes. Throat and wall tappings were used. The flow nozzles were calibrated in water and in high-pressure nitrogen at 20 and 60 barg. The wall-tapping data are in excellent agreement with the discharge-coefficient equation in ISO 5167-3:2003: all
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Discharge coefficient of subsurface weirs
Proceedings of the Institution of Civil Engineers - Water Management, 2014Experimental and numerical studies were performed to examine the relationship between the hydraulic properties and physical dimensions of a subsurface weir system and the discharge over it under steady-state conditions. Experimental modelling was based on a laboratory-scale physical sand-tank model, within which a subsurface dam and weir structure was
Abdorreza Kabiri-Samani +1 more
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Discharge coefficients of diaphragms and nozzles
Measurement Techniques, 19591. The table of initial discharge coefficients of diaphragms should be corrected by taking the coefficient value 0.646 (instead of 0.645) for the 0.35 modulus. 2. The functional dependence of the initial discharge coefficient on the modulus of flow-contraction devices, represented by a polynomial of the 4th degree, yields deviations from
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Calculation of the Townsend Discharge Coefficients and the Paschen Curve Coefficients
Contributions to Plasma Physics, 2007AbstractThe determination of Paschen curve coefficients A and B and the first and second Townsend coefficient are discussed for the creation of gas discharges from extraordinary gasses. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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ِِDischarge Coefficient in Oblique Side Weirs
2007Side weirs are flow diversion devices that are widely used in irrigation, drainage and urban sewage systems. The present study focuses on the investigation of the effect of oblique side weirs on the discharge coefficient of a side weir under subcritical flow condition in rectangular channels.
HONAR, T., JAVAN, M.
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Discharge Coefficients of Chamfered Orifices and Nozzles
Aircraft Engineering and Aerospace Technology, 1948REFERENCE has frequently been made to the increase in the discharge coefficient of chamfered orifices and nozzles, yet few investigations have been made to study these variations in detail. The experiments described in the following were carried out in an attempt to clear some of these points.
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