Stagnation point flows with freestream turbulence  The matching condition
Abstract
In many situations, the calculation of stagnation point flows with imbedded freestream turbulence is of practical importance. One example for such a situation is related to the combustor exhaust flow impacting on the nozzle guide vanes in a gas turbine, while another example is concerned with the heat transfer at a rettachment point of a separated turbulent flow. However, a difficulty has recently been encountered in a kepsilon calculation. This difficulty was related to the attainment of a proper match between the outer freestream flow and the turbulent/laminar viscous sublayer. The present note is concerned with the resolution of this problem for the outer freestream flow. For a special case, an analytical solution is found to link the outer flow with an inner viscous layer flow. The considered case involves a lowspeed, twodimensional, constantdensity stagnation point flow with imbedded freestream turbulence.
 Publication:

AIAA Journal
 Pub Date:
 November 1985
 DOI:
 10.2514/3.9176
 Bibcode:
 1985AIAAJ..23.1822S
 Keywords:

 Free Flow;
 Stagnation Flow;
 Turbulent Flow;
 Gas Turbine Engines;
 KEpsilon Turbulence Model;
 Low Speed;
 Stagnation Point;
 Two Dimensional Flow;
 Viscous Flow;
 Fluid Mechanics and Heat Transfer