Calculation of turbulent MHD boundary layer in MHD generator channels

Journal Article · Mon Nov 01 00:00:00 EST 1976 · High Temp. (USSR) (Engl. Transl.); (United States)

OSTI ID:7231077

Vatazhin, A B; Alavidze, G R

The problem of calculating a turbulent magnetohydrodynamic (MHD) boundary layer in channels of high-temperature MHD units using a closed differential equation describing turbulent viscosity is formulated. It is shown that, to a first approximation, this equation is of the same form as in ordinary gasdynamics, and that the magnetic field affects the characteristics of the boundary layer through MHD force and heat sources that can be taken into account by averaged motion and energy equations. An approximation model is proposed to take into account Joule heat release near the cold electrode wall of the channel. MHD boundary layers are calculated for two regimes, at a constant speed of the external flow and at constant pressure. It is shown that in the first case the boundary layer is characterized, at sufficiently strong electric currents, by increasing Stanton number on the electrode wall and increasing coefficient of friction on the insulation wall. In the second case the boundary layer on the electrode separates and the flow on the insulation wall is nonstalling at practically any retardation of the external flow. (AIP)

• Research Organization: High-Temperature Institute, Academy of Sciences of the USSR
• OSTI ID: 7231077
• Journal Information: High Temp. (USSR) (Engl. Transl.); (United States), Vol. 14:3
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
MHD CHANNELS
FLOW MODELS
BOUNDARY LAYERS
ELECTRODES
HEAT TRANSFER
JOULE HEATING
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MHD GENERATORS
TURBULENT FLOW
VISCOSITY
DIRECT ENERGY CONVERTERS
ENERGY TRANSFER
FLUID FLOW
FLUID MECHANICS
HEATING
HYDRODYNAMICS
LAYERS
MATHEMATICAL MODELS
MECHANICS
PLASMA HEATING
300104* - MHD Generators- Duct Engineering & Fluid Dynamics