| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
|---|
| Research Abstract |
We numerically assess the influence of non-uniform magnetic flux density on turbulent duct flows in a liquid metal magnetohydrodynamic (MHD) electrical power generator. As increasing the magnetic flux density (or Hartmann number), the M-shaped velocity profile produced by eddy currents develops in the plane perpendicular to the magnetic field; the maximum velocity in the sidewall layer of the M-shaped profile increases to keep the flow rate. Under the condition of a relaminarized flow, the turbulence structures align along the magnetic field and flow repeatedly like the Karman vortex sheet. At a higher Hartmann number, the wall-shear stress in the sidewall layer increases and the sidewall jets transit to turbulence.
|
