Curvature Effects on Two-dimensional Turbulent Wall Jets : Numerical Analysis with Two-equation Model of Turbulence

Abstract

The purpose of this paper is to study the effects of surface curvature on the developments of turbulent wall jets along curved surfaces with the application of an algebraic two-equation model of turbulence. Numerical results for mean flow characteristics as well as turbulence characteristics in the turbulent wall jets along plane, concave and convex surfaces agree with the measurements in a range of curvatures b/R = -0.1 to 0.1, where b is the half width of the wall jet and R is the radius of surface curvature. The turbulence energy balances across the wall jets are discussed and the deficiencies are identified in the modeling of curved wall jets.