Journal
COMPUTERS & FLUIDS
Volume 86, Issue -, Pages 490-499Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compfluid.2013.07.032
Keywords
Coaxial jet; Hot environment; High-order WENO scheme; Correlation model; Optimisation criteria
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Coaxial jets with and without a supersonic core flow are typical for many technical applications and therefore of general interest. These jets show a lot of unsteady phenomena such as shear layer instability and transition to turbulence. Their accurate numerical simulation is still challenging despite todays available computing resources. The strategy of using high-fidelity numerical methods and a high spatial resolution helps to increase the range of resolved scales of the flow. This paper focuses on the numerical simulation of coaxial jets entering into a hot environment. Based on these results a new correlation model and optimisation criteria is proposed to predict the potential core- and supersonic length of the coaxial jet and leading to a significantly increased jet length. In particular, the enlarged supersonic jet length is of interest for special industrial applications. (C) 2013 Elsevier Ltd. All rights reserved.
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