On the use of wall functions as boundary conditions for two-dimensional separated compressible flowsA new and improved wall function method for compressible turbulent flows has been developed and tested. This method is applicable to attached and separated flows, to both high- and low-Reynolds number flows, and to flows with adiabatic and nonadiabatic surfaces. This wall function method has been applied to the Launder-Spalding k-epsilon two-equation model of turbulence. The tests consist of comparisons of calculated and experimental results for: (1) an axisymmetrical transonic shock-wave/boundary-wave interaction flow at low Reynolds number in an adiabatic tube, (2) an axisymmetrical high-Reynolds number transonic flow over a nonadiabatic bump, and (3) a two-dimensional supersonic high-Reynolds number flow on a nonadiabatic deflected flap. Each of these experiments had significant regions of flow separation. The calculations are performed with an implicit algorithm that solves the Reynolds-averaged Navier-Stokes equations. It is shown that the results obtained agree very well with the data for the complex compressible flows tested.
Document ID
19850044233
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Viegas, J. R. (NASA Ames Research Center Moffett Field, CA, United States)
Rubesin, M. W. (NASA Ames Research Center Moffett Field, CA, United States)
Horstman, C. C. (NASA Ames Research Center Moffett Field, CA, United States)