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flowrate measurement in Turbulent Liquid Metal Channel Flow Using Time-of-Flight Lorentz Force Velocimetry:Experimental Investigations and Numerical Modeling

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Journal of Iron and Steel Research International 2012年第S1期19卷 582-585页

作者： JIAN Dan-dan KARCHER Christian Ilmenau University of Technology Institute of Thermodynamics and Fluid MechanicsIlmenau D-98684Germany

Lorentz force velocimetry(LFV)is a suitable non-contact technique to measure flow velocity and flowrates in electrically conducting high-temperature *** is based on the principles of magnetohydrodynamics:when an electrically conducting fluid passes the field lines produced by a magnet system,eddy currents are induced within the *** interactions of the eddy currents with the magnetic field generate Lorentz *** LFV the counterforce acting on the magnet system is *** a flowmeter consists of a permanent magnet system and an attached digital force *** force recorded by the flowmeter is proportional to the flowrate Q and depends on both the electrical conductivity σ of the fluid and the spatial distribution of the applied magnet field ***,in metallurgical applications,σ is often unknown or fluctuates in time as it strongly depends on both temperature and composition of the *** the present paper we investigate a technique called Time-of-Flight Lorentz force velocimetry ToF *** this technique,the flowrate can be determined by just cross-correlating the two force signals recorded by two flowmeters which are arranged one behind the other separated by a certain distance *** the passage of the triggered vortices, this ToF LFV measures the transit time τ of these *** we recalculate the velocity V according to the relation V = D/τ.We experimentally and numerically study turbulent liquid metal flow in the test facility EFCO(electromagnetic flow control channel)using the eutectic alloy GainSn as a test *** experiments show that this electromagnetic ToF LFV is well suited to determine the flow velocity and *** experiments are accompanied by numerical simulations using the commercial program package FLUENT.

关键词： Lorentz force velocimetry electromagnetic flowrate measurement magnetohydrodynamic

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