Computation of tabs and wing generator modification on temperature distribution and flow of free jet

Abstract

The mixing process is important improve the performance of jet-engineering equipment. The purpose research, aim to study temperature distribution might be simulate mixing layer of jet flow with surrounding fluid.In this study measure the temperature at the position the jet exit. Z=1D, 2D, 4D and 6D. Calculate the temperature coefficient and a computational fluid dynamic (CFD) using ANSYS, Fluent (V.15.0) was selected to this computation. The investigation model was jets discharging from pipe nozzle installing wing generator having an inner diameter d=28.15 mm and wall fitted to the outlet of the jet. Promoters were attached at the nozzle exit. 4 types of turbulence promoters were triangular tab with tip angle of 45° and 90° and vortex generators with attack angle of 45° and 60°. In addition, the conventional pipe nozzle was studied to comparing as base results and modifications. Installing at 2 and 4 positions give the measuring temperature. The Reynolds number of test fluid was constant at Re=29,500. Increase the strength of jet mixing was found the case of vortex generator installed with 4 positions, attack angle of 60° gives the strongest mixing in jet when comparing with the other cases.