The effect of a turbulent wake on the stagnation point. II - Heat transfer resultsA phenomenological model is proposed which relates the effects of freestream turbulence to the increase in stagnation point heat transfer. The model requires both turbulence intensity and energy spectra as inputs to the unsteady velocity at the edge of the boundary layer. The form of the edge velocity contains both a pulsation of the incoming flow and an oscillation of the streamlines. The incompressible unsteady and time-averaged boundary layer response is determined by solving the momentum and energy equations. The model allows for arbitary two-dimensional geometry, however, results are given only for a circular cylinder. The time-averaged Nusselt number is determined theoretically and compared to existing experimental data.
Document ID
19930035425
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hanford, Anthony J. (NASA Langley Research Center Hampton, VA, United States)
Wilson, Dennis E. (Texas Univ. Austin, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1992
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
ASME PAPER 92-GT-197
Meeting Information
Meeting: ASME, International Gas Turbine and Aeroengine Congress and Exposition