Diagnostics of Liquid Metal Flows Using Fibre-Optic Velocity Sensor

Abstract

ABSTRACT. The present work is connected with a theoretical and experimental study of the application of two-component fibre-optic velocity sensors for diagnostics of liquid metal turbulent flo~. The above sensors have high spatial resolution (16)m~) and exhibit insignificant sensitivity to admixtures and the magnetic field; they could also be used for liquid metals in the presence of strong currents (::::10 A). The experimental data on the velocity fields and intensity of its pulsations in strongly nonuniform liquid metal magnetohydrodynamic flows are given. Dynamical errors of velocity measurements at a frequency of 200 Hz are negligible.

Electro-vortex flow simulation using coupled meshes

“…The measurements colored in red (fig. 7) were not quoted by Zhilin et al [68], but estimated from the sketch. Similarly, the material properties were not given; they may vary considerably depending on the exact material/alloy.…”

“…Here we will study the well reviewed example of a thin electrode touching a cylindrical bath of liquid metal [65][66][67]. The experiment was conducted at the Institute of Physics in Riga and published by Zhilin et al [68]. Figure 7 illustrates the setup: a horizontal current passes through a cylindrical bath of liquid mercury (colored in blue).…”

Velocity Measurement Techniques for Liquid Metal Flows

“…In an air experiment, velocities down to 10 cm/s were successfully recorded. Zhilin et al [10] and Eckert et al [11] constructed more complex sensors upon this principle, which were proven to work in liquid metals. A thin glass rod of several tens of µm in diameter was sealed into a thin-walled conical glass tube.…”

“…A thin glass rod of several tens of µm in diameter was sealed into a thin-walled conical glass tube. The other end of this pointer was either blackened and brought into the light path where it led to absorption [10], or illuminated and observed by means of an endoscope [11]. Both techniques allowed for velocity resolution below 1 cm/s of two components.…”

Effects of variable thermal conductivity on Stokes' flow of a thermoelectric fluid with fractional order of heat transfer

“…Other techniques which have been used to inspect the velocity field are potential probes in external magnetic fields [7,9], selfcontained electromagnetic [10] and permanent-magnet probes [11], pitot tubes [12], fiber-optic sensors [13], pulsed ultrasonic Doppler anemometers (UDA) [14] and temperature fluctuation correlations ('time-of-flight methods') [15].…”