New Method of Flow Measurements Based on CFD for Partially Filled Pipe
Aiming at the problems that current methods of flow measurements for partially filled pipe are difficult to measure flow at low liquid level,install and maintain,the new measured method for partially filled pipe is proposed.The liquid level is got by using a high-precision pressure sensor that is based on the theory of communicating pipe.The measured value is processed by the liquid level-flow function model to obtain the precise flow value.Before the experiments,a U-shaped communicating pipe was externally connected at the appropriate position of the steel pipe.Based on the computer fluid dynamics(CFD)simulation technology,the flow state of the gas-liquid two-phase flow in the pipe was simulated,and the optimal installation position and diameter size of the U-shaped communicating pipe were determined.According to the simulation results,it could be concluded that the reasonable installed position of the communicating pipe was that the position distances from 1m to 2.5m from the water inlet place of the steel pipe,and the diameter of the communicating pipe should be selected as 0.02m.The experimental results showed that when the liquid level was below than 10%of the diameter of the steel pipe,the measurement error was less than 2%,and the repeatability error was about 1.6%.The experiments verified that the method was feasible and suitable for many occasions,such as agricultural irrigation and sewage discharge.
partially-filled computer fluid dynamics two-phase flow model simulation
Wen Li Qingfang Zhang Xueke Luo Xu Chen
School of Mechanical and Material Engineering,North China University of Technology,Beijing 100144,China
国际会议
上海
英文
49-53
2018-12-22（万方平台首次上网日期，不代表论文的发表时间）