TY - GEN
T1 - Numerical study on turbulent flows in a liquid metal MHD generator
AU - Shionoya, Hiroki
AU - Kobayashi, Hiromichi
AU - Okuno, Yoshihiro
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - Large-eddy simulation (LES) of the turbulent duct flows in a liquid metal magnethydrodynamic (MHD) power generator is examined to reveal the behavior of the MHD flows and the turbulent structures. The non-uniform magnetic flux density in the streamwise direction produces two eddy currents. The eddy current causes the wall-jet flows with M-shaped mean streamwise velocity profiles in the plane perpendicular to the external magnetic field. In contrast, the Hartmann flows with the flattened velocity profiles by the Lorentz force are produced in the plane parallel to the external magnetic field. In the case of the strong magnetic flux density, the turbulence structure similar to the Karman vortex sheets emerge in the downstream duct. As for the secondary flows, two vortexes at the corner of the duct disappear with applied magnetic flux density. When the magnetic field is applied, the frequency spectrum of the Reynolds stress gives the strong intensity in a low frequency regime.
AB - Large-eddy simulation (LES) of the turbulent duct flows in a liquid metal magnethydrodynamic (MHD) power generator is examined to reveal the behavior of the MHD flows and the turbulent structures. The non-uniform magnetic flux density in the streamwise direction produces two eddy currents. The eddy current causes the wall-jet flows with M-shaped mean streamwise velocity profiles in the plane perpendicular to the external magnetic field. In contrast, the Hartmann flows with the flattened velocity profiles by the Lorentz force are produced in the plane parallel to the external magnetic field. In the case of the strong magnetic flux density, the turbulence structure similar to the Karman vortex sheets emerge in the downstream duct. As for the secondary flows, two vortexes at the corner of the duct disappear with applied magnetic flux density. When the magnetic field is applied, the frequency spectrum of the Reynolds stress gives the strong intensity in a low frequency regime.
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U2 - 10.2514/6.2011-3601
DO - 10.2514/6.2011-3601
M3 - Conference contribution
AN - SCOPUS:85060583700
SN - 9781624101472
T3 - 42nd AIAA Plasmadynamics and Lasers Conference
BT - 42nd AIAA Plasmadynamics and Lasers Conference
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 42nd AIAA Plasmadynamics and Lasers Conference 2011
Y2 - 27 June 2011 through 30 June 2011
ER -