Influence of non-uniform magnetic flux density on turbulent MHD flows in a liquid metal MHD power generator

Hiromichi Kobayashi, Hiroki Shionoya, Yoshihiro Okuno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication42nd AIAA Plasmadynamics and Lasers Conference
Publication statusPublished - 2011
Event42nd AIAA Plasmadynamics and Lasers Conference 2011 - Honolulu, HI, United States
Duration: 2011 Jun 272011 Jun 30

Other

Other42nd AIAA Plasmadynamics and Lasers Conference 2011
CountryUnited States
CityHonolulu, HI
Period11/6/2711/6/30

Fingerprint

electric generators
Magnetic flux
Magnetohydrodynamics
liquid metals
Liquid metals
turbulent flow
magnetic flux
flux density
ducts
Ducts
Turbulent flow
velocity distribution
Magnetic fields
vortex sheets
secondary flow
Secondary flow
Reynolds stress
Large eddy simulation
large eddy simulation
Eddy currents

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Kobayashi, H., Shionoya, H., & Okuno, Y. (2011). Influence of non-uniform magnetic flux density on turbulent MHD flows in a liquid metal MHD power generator. In 42nd AIAA Plasmadynamics and Lasers Conference

Influence of non-uniform magnetic flux density on turbulent MHD flows in a liquid metal MHD power generator. / Kobayashi, Hiromichi; Shionoya, Hiroki; Okuno, Yoshihiro.

42nd AIAA Plasmadynamics and Lasers Conference. 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kobayashi, H, Shionoya, H & Okuno, Y 2011, Influence of non-uniform magnetic flux density on turbulent MHD flows in a liquid metal MHD power generator. in 42nd AIAA Plasmadynamics and Lasers Conference. 42nd AIAA Plasmadynamics and Lasers Conference 2011, Honolulu, HI, United States, 11/6/27.
Kobayashi H, Shionoya H, Okuno Y. Influence of non-uniform magnetic flux density on turbulent MHD flows in a liquid metal MHD power generator. In 42nd AIAA Plasmadynamics and Lasers Conference. 2011
Kobayashi, Hiromichi ; Shionoya, Hiroki ; Okuno, Yoshihiro. / Influence of non-uniform magnetic flux density on turbulent MHD flows in a liquid metal MHD power generator. 42nd AIAA Plasmadynamics and Lasers Conference. 2011.
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