Numerical simulation of propagation of plane turbulent straitened jet in counter flow using LES turbulence model

摘要

In technical applications are often used jets, emerging in the counter. Experimental study of such flows for the plane and axisymmetric cases was carried out in [1-5]. In [4] with an approximate integral method and some hypotheses about the nature of the course, based on experimental data obtained approximate analytical expressions for the basic characteristics of axisymmetric flow within the boundary layer for the case of a1, where a-geometric parameter characterizing the ratio of the size of the incoming flow and the jet directed toward him. In experimental studies also generally considered the case of large values of a. The following research carried out for the plane case for moderate values of a =10÷25, in which the essential straitness jet. Calculations were carried out on the basis of time-dependent system of Navier-Stokes equations for turbulent flow, implemented using LES turbulence model in the complex ANSYS CFX. On the basis of the conservation laws for an analytical assessment of the range of parameters in which there is a solution to the problem, and compared the results of the numerical solution with the available experimental data.