Numerical study on turbulent flows in a liquid metal MHD generator

Hiroki Shionoya, Hiromichi Kobayashi, Yoshihiro Okuno

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

5 Citations (Scopus)

Abstract

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.

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

Gas generators
Magnetic flux
liquid metals
Liquid metals
ducts
turbulent flow
Ducts
Turbulent flow
magnetic flux
generators
flux density
Magnetic fields
Eddy currents
eddy currents
Hartmann flow
Vortex flow
velocity distribution
magnetic fields
wall jets
vortex sheets

ASJC Scopus subject areas

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

Cite this

Shionoya, H., Kobayashi, H., & Okuno, Y. (2011). Numerical study on turbulent flows in a liquid metal MHD generator. In 42nd AIAA Plasmadynamics and Lasers Conference

Numerical study on turbulent flows in a liquid metal MHD generator. / Shionoya, Hiroki; Kobayashi, Hiromichi; Okuno, Yoshihiro.

42nd AIAA Plasmadynamics and Lasers Conference. 2011.

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

Shionoya, H, Kobayashi, H & Okuno, Y 2011, Numerical study on turbulent flows in a liquid metal MHD generator. in 42nd AIAA Plasmadynamics and Lasers Conference. 42nd AIAA Plasmadynamics and Lasers Conference 2011, Honolulu, HI, United States, 11/6/27.
Shionoya H, Kobayashi H, Okuno Y. Numerical study on turbulent flows in a liquid metal MHD generator. In 42nd AIAA Plasmadynamics and Lasers Conference. 2011
Shionoya, Hiroki ; Kobayashi, Hiromichi ; Okuno, Yoshihiro. / Numerical study on turbulent flows in a liquid metal MHD generator. 42nd AIAA Plasmadynamics and Lasers Conference. 2011.
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