Numerical investigation of transition control of a flat-plate boundary layer
A numerical model has been developed for investigating boundary layer transition control for a three-dimensional flat-plate boundary layer. Control of a periodically forced boundary layer in an incompressible fluid is studied using surface heating techniques. The spatially evolving boundary layer is simulated. The Navier-Stokes and energy equations are integrated using a fully implicit finite difference/spectral method. The Navier-Stokes equations are in vorticity-velocity form and are coupled with the energy equation through the viscosity dependence on temperature. Both passive and active methods of control by surface heating are investigated. In passive methods of control, wall heating is employed to alter the stability characteristics of the mean flow. Both uniform and nonuniform surface temperature distributions are studied. In the active control investigations, temperature perturbations are introduced locally along finite heater strips to directly attenuate the instability waves in the flow. Passive control of small-amplitude two-dimensional Tollmien-Schlichting waves and three-dimensional oblique waves are numerically simulated with both uniform and nonuniform passive heating applied.
- Research Organization:
- Arizona Univ., Tucson, AZ (USA)
- OSTI ID:
- 5293243
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOUNDARY LAYERS
CONTROL
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
FINITE DIFFERENCE METHOD
FLUID FLOW
HEATING
INCOMPRESSIBLE FLOW
ITERATIVE METHODS
LAYERS
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PLATES
SURFACES
THREE-DIMENSIONAL CALCULATIONS