Effect of Nozzle to Plate Distance on Local Heat Transfer Distribution by Incompressible Chevron Jet using CFD
In this paper, numerical simulation was performed to analyze the effect of nozzle to plate distance on heat transfer performance of an incompressible hot jet by a chevron nozzle on a flat surface. Influence is studied at the nozzle to plate distance (z/d) 1, 2, 4, 6, 8 and 10 for Reynolds number of 28,000. Numerical analysis has been done by solving conservation equations of momentum, mass and energy with two equations based RNG k- ε turbulence model and Energy model to determine the local distribution of Nusselt number on the plate. A change in Nusselt number distribution is observed, for lower nozzle to plate distance (z\d ≥ 4) secondary peak in the Nusselt number is present. From nozzle to plate distance (z/d ≤ 6), the Nusselt number decreases gradually from the stagnation point in the radial direction.
Keywords - Chevron Nozzle, Nusselt Number, Heat Transfer, Computational Fluid Dynamics