Abstract
The three-dimensional Navier-Stokes equations are numerically solved to study the growth mechanism in a compressible mixing layer using high-order compact upwind-biased schemes. Spatially evolving mixing layers with Convective Mach number up to 2.1 and Re=1000 based on the inlet momentum thickness and the velocity difference in the mixing layer are presented. The numerical results provide new physical insights into three-dimensional structures in a turbulent mixing layer. Upstream disturbance conditions play an important role for the evolution of the turbulent shear layers. The growth of a pair of oblique modes is responsible for the Lambdashaped vortical structure in the shear layers which yields a turbulent shear layer with a higher growth rate.
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