An Investigation of Two Dimensional Parallel and Non-Parallel Steady Mixing Layers

摘要

A CFD code was generated to simulate the steady state behavior of two dimensional,parallel and non- parallel merging mixing layers.For the free stream velocity ratios of 0.7 and 0.9,the effect of the merging angle of free stream velocities of between0.0 to 18.0 degrees on the mixing zone’s velocity distribution,and on the physical spreading of the turbulent domain was numerically simulated and studied.The results were in good agreement with the available theoretical and experimental results,and indicated that increasing the angle of merging of the two free streams,or increasing their associated free stream velocity ratios increases the spatial growth rate and decreases the turbulent development distance.