Numerical simulation of temperature field on container of pVTt gas flow standard device tank
1. School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Calibration and Testing Center for Gas Flowmeter of the Quality and Technology Supervision Bureau of Jiangsu, Zhenjiang, Jiangsu 212000, China
Abstract：To solve the problem of gradually prolonged gas stabilization time in container during the operation of pVTt gas flow standard device, the mechanism and approach of rapid stabilization for the temperature field in standard device tank were investigated. The two-way fluid-solid-thermal coupling mathematical model and the temperature field simulation models under natural constant temperature mode and water-jacket constant temperature mode were established. The COMSOL multiphysics software was used to simulate and test the intake and constant temperature processes. The results show that the water-jacket constant temperature mode can effectively eliminate the severe temperature gradient phenomenon in the natural constant temperature mode and shorten the gas stabilization time in the standard device tank. The main affecting factor on rapid gas stabilization in standard device tank is the temperature difference between the inlet air temperature of tank and the water temperature in water jacket. Keeping the water temperature in water jacket substantially the same as the inlet air temperature of standard device can effectively shorten the gas stabilization time in standard device tank and improve the efficiency of gas flow meter verification.
李伯全1, 陈彩俊1, 张嘉琛1, 石建荣2. 水夹层式pVTt标准装置容器温度场数值模拟[J]. 江苏大学学报（自然科学版）, 2019, 40(6): 655-661.
LI Boquan1, CHEN Caijun1, ZHANG Jiachen1, SHI Jianrong2. Numerical simulation of temperature field on container of pVTt gas flow standard device tank[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2019, 40(6): 655-661.
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2019, Vol. 40 
