Eddy current flowmeter for sodium flow

Winter School on Continuous Media Mechanics

Pavlinov, A.^1 ; Khalilov, R.^1 ; Mamikyn, A.^1 ; Kolesnichenko, I.^1,2

Institute of Continuous Media Mechanics, Perm, Russia^1

Perm National Research Polytechnic University, Perm, Russia^2

关键词: Alternating magnetic field;    Amplitude ratios;    Calibration procedure;    Cylindrical channel;    Liquid sodium;    Magnetic field frequency;    Non-uniform velocities;    Shape coils;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/208/1/012031/pdf
DOI  :  10.1088/1757-899X/208/1/012031

来源: IOP

【 摘 要 】

The eddy current flowmeter for liquid metal passing through the cylindrical channel is studied experimentally and numerically. The alternating magnetic field is created by an annular-shape coil and resulting field is measured by two symmetric coils. The dependence of the signal on the magnetic field frequency was obtained for a solid duralumin cylinder. The phase shift and amplitude ratio linearly depends on the flowrate in a wide range of parameters. The workability of the method was tested on a liquid sodium, flowing along a cylindrical channel. The dependencies for liquid sodium and solid duralumin cylinder differ due to the existence of a non-uniform velocity profile along the radius of the fluid. This necessitates an additional calibration procedure on the liquid metal in addition to research on the solid conductor. The developed flowmeter is used to measure the flowrate in the sodium loop.