步进轮摆共振法测量流体黏度  

Measuring fluid viscosity based on stepping wheel pendulum resonance method

作　　者：郭泽贤 沈凡皓 包泽杭 王子文 陈水桥[2] 姚星星 GUO Ze-xian;SHEN Fan-hao;BAO Ze-hang;WANG Zi-wen;CHEN Shui-qiao;YAO Xing-xing(CHU Kochen Honors College,Zhejiang University,Hangzhou 310027,China;School of Physics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学竺可桢学院,浙江杭州310027 [2]浙江大学物理学院,浙江杭州310027

出　　处：《物理实验》2022年第8期40-47,共8页Physics Experimentation

基　　金：浙江大学高等教育“十三五”教学改革研究项目(No.zdjg19031);浙江大学物理学院2022年教学改革项目。

摘　　要：在液体中做受迫振动的摆球可以在特定的情形下达到共振,所以只要改变摆球的摆动频率,并测量摆球达到最大摆幅时的共振频率,就能实现流体黏度的测量.通过计算机模拟,验证了在0.1~1.5Pa·s范围内黏度与共振频率呈线性关系,给出了计算流体黏度与共振频率的简化公式,设计了实验系统,并通过实验验证了上述理论.探究了摆长、温度和Q值对流体黏度测量的影响,并分析了实验系统的性能误差和进一步改进的措施.It was proved that the pendulum ball forced to vibrate in the liquid could achieve resonance under specific circumstances.Therefore,the fluid viscosity could be achieved by changing the pendulum ball swing frequency and measuring the resonance frequency when the pendulum ball reached the maximum swing.In order to easily realize the measurement of fluid viscosity,computer simulation was used to verify the linear relationship between viscosity and resonance frequency in the viscosity range of 0.1~1.5Pa·s,and the simplified formula for calculating fluid viscosity and resonance frequency was given.Finally,the experimental system was designed,and the above theory was verified by experiments.In addition,the effects of pendulum length,temperature and Qvalue on the fluid viscosity measurement were explored,and the performance error and further improvement measures of the experimental system were analyzed.

关 键 词：步进轮摆共振法 共振频率 步进电机 流体黏度 

分 类 号：O357[理学—流体力学]