Convective heat transfer in MHD channels and its influence on channel performance
The limitations of the integral boundary layer methods and the potential of the differential boundary layer method in analyzing MHD channel flows are assessed. The sensitivity of results from the integral method to the parametrization of boundary layer profiles and calculation of wall heat transfer is established. A mixing-length type turbulence model for flow on rough walls is developed and validated by comparison with experimental data. The turbulence model is used in a quasi-three-dimensional boundary layer model to evaluate the influence of wall roughness and pressure gradients on the flow characteristics and performance of MHD channels. The behaviors of skin friction and Stanton number calculated from the analytical model are found to differ considerably from the empirical correlations valid for non-MHD flows without pressure gradients.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5511632
- Report Number(s):
- CONF-800104-5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
300104* -- MHD Generators-- Duct Engineering & Fluid Dynamics
ANALYTICAL SOLUTION
BOUNDARY LAYERS
CONVECTION
DIRECT ENERGY CONVERTERS
ENERGY TRANSFER
FLOW MODELS
FLUID FLOW
FRICTION
HEAT TRANSFER
LAYERS
MATHEMATICAL MODELS
MHD CHANNELS
MHD GENERATORS
PARAMETRIC ANALYSIS
PRESSURE GRADIENTS
ROUGHNESS
SURFACE PROPERTIES
THREE-DIMENSIONAL CALCULATIONS
TURBULENT FLOW