ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
HEAT TRANSFER CHARACTERISTICS AND BOUNDARY LAYER DEVELOPMENT ABOUT HEATING AND COOLING ROTATING BLUNT BODIES AT SUPERSONIC SPEEDS
Résumé
Effects of angular rotation of a general or
a pre-heated blunt body flying at supersonic
speeds on its boundary layer and heat transfer
characteristics for various operating and surface
conditions are investigated. Information obtained
can be used in assisting the selection of
optimum rotating speeds for stability reasons and
in selecting window surface materials for designing
the frontal region of guided projectiles. A
mathematical model based on similarity and coordinate
perturbation analyses performed on the
Illingworth-Stewartson transformation plane is
constructed and governing equations of the compressible
rotating laminar boundary layer flow
are transformed into a set of coupled, nonlinear
equations in first, third and fifth order of
transformed coordinates. A standard numerical
integration scheme is employed to solve the equations
and a systematic shooting technique is used
to overcome the difficulties introduced by the
boundary conditions. Velocity and temperature
profiles as well as shear stress, skin friction
and local heat transfer rates are directly
expressed in terms of the transformed variables.
Flow data, flow separation and heat transfer
rates can be used as initiation calculation for
the corresponding axisymmetric eddy-viscosity
turbulent numerical scheme.