TY - GEN
T1 - Influence of non-uniform magnetic flux density on turbulent MHD flows in a liquid metal MHD power generator
AU - Kobayashi, Hiromichi
AU - Shionoya, Hiroki
AU - Okuno, Yoshihiro
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - Large-eddy simulation (LES) of turbulent MHD duct flows is carried out in the liquid metal MHD generator, and the influence of the non-uniform magnetic flux density on the turbulent flows is examined. For high magnetic flux density, the structures of Reynolds stress align along the orientation of the magnetic flux density, and those structures periodically flowed toward the downstream region like Karman vortex sheets are observed. The stronger magnetic field makes the laminarized flow turbulent again. That is confirmed by using spectrum analysis. It is found that a pair of eddy as the secondary flow for the non- MHD duct flow diminishes in the MHD flow. The non-uniform magnetic flux density in the streamwise direction produces the eddy currents that lead to the M-shaped velocity profiles in the plane parallel to the external magnetic field. The velocity profiles are modulated more strongly with the magnetic flux density.
AB - Large-eddy simulation (LES) of turbulent MHD duct flows is carried out in the liquid metal MHD generator, and the influence of the non-uniform magnetic flux density on the turbulent flows is examined. For high magnetic flux density, the structures of Reynolds stress align along the orientation of the magnetic flux density, and those structures periodically flowed toward the downstream region like Karman vortex sheets are observed. The stronger magnetic field makes the laminarized flow turbulent again. That is confirmed by using spectrum analysis. It is found that a pair of eddy as the secondary flow for the non- MHD duct flow diminishes in the MHD flow. The non-uniform magnetic flux density in the streamwise direction produces the eddy currents that lead to the M-shaped velocity profiles in the plane parallel to the external magnetic field. The velocity profiles are modulated more strongly with the magnetic flux density.
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U2 - 10.2514/6.2011-3602
DO - 10.2514/6.2011-3602
M3 - Conference contribution
AN - SCOPUS:85060576636
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 -