Calibrationless rotating Lorentz-force flowmeters for low flow rate applications

Hvasta, M G; Dudt, D; Fisher, A E; Kolemen, E

doi:10.11578/1562007

Title: Calibrationless rotating Lorentz-force flowmeters for low flow rate applications

Abstract

A 'weighted magnetic bearing' has been developed to improve the performance of rotating Lorentz-force flowmeters (RLFFs). Experiments have shown that the new bearing reduces frictional losses within a double-sided, disc-style RLFF to negligible levels. Operating such an RLFF under 'frictionless' conditions provides two major benefits. First, the steady-state velocity of the RLFF magnets matches the average velocity of the flowing liquid at low flow rates. This enables an RLFF to make accurate volumetric flow measurements without any calibration or prior knowledge of the fluid properties. Second, due to minimized frictional losses, an RLFF is able to measure low flow rates that cannot be detected when conventional, high-friction bearings are used. This paper provides a brief background on RLFFs, gives a detailed description of weighted magnetic bearings, and compares experimental RLFF data to measurements taken with a commercially available flowmeter.

Authors:: Hvasta, M G; Dudt, D; Fisher, A E; Kolemen, E

Publication Date:: 2018-05-29

DOE Contract Number:: AC02-09CH11466

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: U. S. Department of Energy

Keywords:: liquid metal

OSTI Identifier:: 1562007

DOI:: https://doi.org/10.11578/1562007

Citation Formats


                    Hvasta, M G, Dudt, D, Fisher, A E, and Kolemen, E. Calibrationless rotating Lorentz-force flowmeters for low flow rate applications.  United States: N. p., 2018. 
        Web.  doi:10.11578/1562007.

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                    Hvasta, M G, Dudt, D, Fisher, A E, & Kolemen, E. Calibrationless rotating Lorentz-force flowmeters for low flow rate applications.  United States.  doi:https://doi.org/10.11578/1562007

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                    Hvasta, M G, Dudt, D, Fisher, A E, and Kolemen, E. 2018.  
"Calibrationless rotating Lorentz-force flowmeters for low flow rate applications".  United States.  doi:https://doi.org/10.11578/1562007.  https://www.osti.gov/servlets/purl/1562007. Pub date:Tue May 29 00:00:00 EDT 2018

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@article{osti_1562007,

  title        = {Calibrationless rotating Lorentz-force flowmeters for low flow rate applications},

  author       = {Hvasta, M G and Dudt, D and Fisher, A E and Kolemen, E},

  abstractNote = {A 'weighted magnetic bearing' has been developed to improve the performance of rotating Lorentz-force flowmeters (RLFFs). Experiments have shown that the new bearing reduces frictional losses within a double-sided, disc-style RLFF to negligible levels. Operating such an RLFF under 'frictionless' conditions provides two major benefits. First, the steady-state velocity of the RLFF magnets matches the average velocity of the flowing liquid at low flow rates. This enables an RLFF to make accurate volumetric flow measurements without any calibration or prior knowledge of the fluid properties. Second, due to minimized frictional losses, an RLFF is able to measure low flow rates that cannot be detected when conventional, high-friction bearings are used. This paper provides a brief background on RLFFs, gives a detailed description of weighted magnetic bearings, and compares experimental RLFF data to measurements taken with a commercially available flowmeter.},

  doi          = {10.11578/1562007},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {5}

}

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