Analysis of turbine flowmeter's performance under vibration condition

The measurement accuracy of the turbine flowmeter is severely affected under vibration conditions. To investigate the impact mechanism, a DN10 turbine flowmeter is taken as the research object. An experimental facility is built to simulate the vibration conditions, and the performance of the turbine flowmeter under vibration conditions is obtained. The average meter factor of the turbine flowmeter increases with vibration amplitude and vibration frequency, and the maximum average meter factor under vibration conditions is 1.24 % higher than that under non-vibration conditions. A simulation method is proposed to simulate the working status of the turbine flowmeter under vibration conditions. Through the analysis of the flow field in the turbine flowmeter, it is found that the change in axial velocity distribution caused by vibration is the main reason for the change in the performance of the turbine flowmeter. The average axial velocity under vibration conditions is greater than that under non-vibration conditions, and increases with the increase of amplitude and frequency, resulting in the increase of impeller speed and the increase of meter factor.