Abstract:Aiming at the problem that the resistance coefficient of Coriolis mass flowmeters accounts for the largest proportion in the flow resistance characteristics of the main refueling line in 35MPa/70MPa hydrogen dispensers, numerical simulation and experiment of Coriolis mass flowmeters under the operating condition of hydrogen dispensers is carried out. The mathematical and physical models of Coriolis mass flowmeters including inlet section, measuring tube and outlet section are established. And the real hydrogen model is used for numerical simulation under different flow rates of hydrogen dispensers. The pressure distribution and velocity distribution is obtained under actual working conditions of Coriolis mass flowmeters, and then the resistance coefficient is calculated according to the differential pressure and hydrogen flow velocity. Moreover the comparison result indicates that there is a good agreement between the numerical simulation results and the experimental results, and the relative error is less than 5%.
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