Large Eddy Simulation of Rectangular Turbulent Buoyant Jets for Industrial Applications

Abstract

Many engineering systems involve the use of high-temperature jets to heat nearby objects or surfaces. In such instances, proximity to the jet exit means that specific properties of the exit velocity and temperature can be of substantial importance in determining conditions at the heated object or surface. Moreover, compared to non-heated jets, the flow field complexity of high-temperature jets is substantially increased due to the presence of buoyant forcing. Through the use of Large Eddy Simulation, we examine the near-field instability and far-field scaling laws of rectangular turbulent buoyant jets and how they specifically apply to industrial applications. We study the effects of non-uniformities of temperature and velocity on both the near and far-field characteristics. The importance of these results for the prediction and understanding of engineering applications involving high-temperature jets is outlined.

NICHOLAS WIMER

Department of Mechanical Engineering, University of Colorado Boulder