NUMERICAL INVESTIGATION OF INLET CONDITION EFFECT ON THERMO-FLUID CHARACTERISTICS OF TURBULENT PLANE JET

摘要

In this research the fluid and thermal characteristics of a plane turbulent jet flow is studied numerically. The results of two-dimensional jet issued from a slot nozzle are presented. A numerical method employing control volume approach with collocated grid arrangement was employed. Velocity and pressure fields are coupled with SIMPLEC algorithm. The turbulent stresses are approximated using k-ε model with two different inlet conditions. The velocity and temperature fields are presented and the rates of their decay at jet centerline are noted. Special attention has been drawn on the influence of the Reynolds number (based on hydraulic diameter) as well as the inflow conditions on the evolution of the plane jet. An influence on the jet evolution is found for Re<6000, but also that the jet is close to a converged state for higher Reynolds numbers. The influence of the inflow conditions on the jet characteristics is so strong.