35MPa/70MPa加氢机用科氏质量流量计阻力特性数值模拟与实验研究

针对科氏质量流量计对介质的阻力在35MPa/70MPa加氢机加注主管路流动总阻力中占比最大的问题,进行了科氏质量流量计在加氢机运营工况下的数值模拟与实验研究。建立了包括入口段、测量管和出口段3个流动区域的科氏质量流量计的数学模型,在加氢机质量流量1~9kg/min时进行了数值模拟分析研究,得到了科氏质量流量计的压力分布和流速分布,根据压力和流速计算得到了科氏质量流量计阻力系数。计算结果与实验结果的对比表明两者能够较好吻合,阻力系数相对误差小于5%。

Numerical Simulation and Experiment Study on Resistance Characteristics of Coriolis Mass Flowmeter for 35MPa/70MPa Hydrogen Dispensers

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%.