DOI: 10.3724/SP.J.1187.2013.00797

Journal of Electronic Measurement and Instrument (电子测量与仪器学报) 2013/27:9 PP.797-802

Analysis the compressibility impact of gas on vortex flowmeter measurement performance

In order to find influence law of the gas compressibility to vortex flowmeter,the basic principle of vortex flowmeter was analyzed;compressible fluid equations of fluid mechanics were used to calculate the flow rate,obtained the compressible isentropic exponent κ on instrument coefficient calculation formula,formula were calculated and analyzed by using MATLAB,found the meter coefficient appeared a trend of the larger as swellable intensified,and deviation reached 1.54% when the speed was 50 m/s. At last,the meter coefficient of compressible and incompressible fluid was researched through the experimental test data and CFD simulation. The coefficient deviation curve calculated by theory is the same as the experiments and simulation.

Key words:vortex flowmeter,gas compressibility,isentropic exponent,instrument coefficient,CFD

ReleaseDate:2014-07-21 17:02:06