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.
The liquid metal (LM) investigations of hydrodynamics and heat transfer affected by longitudinal and transverse magnetic field (MF) were carried out. The current experiments program deals with temperature and velocity fields, local and average heat transfer intensities, temperature fluctuation intensities in a horizontal heated tube. The strong influence of thermo gravitational convection (TGC) in all regimes was observed in experiments applied to blanket and divertor of tokamak. Two unexpected troubles were discovered: zones of extremely low local heat transfer intensities in some regimes of MF and TGC joint influence; dangerous temperature low-frequent fluctuations with high amplitude near the tube wall in some MHD configurations with TGC affect. Numerical simulation of magneto hydrodynamic (MHD) heat transfer is working out simultaneously with experiments.
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