Comparison of Large Eddy Simulation and Unsteady Reynolds Averaged Navier-Stokes for evaluation of entropy noise

[+] Author and Article Information
Eduard Ron

University of Oxford, Department of Engineering Science, University of California - San Diego, Center for Energy Research

Kam Chana

University of Oxford, Department of Engineering Science

1Corresponding author.

ASME doi:10.1115/1.4037140 History: Received April 06, 2017; Revised June 14, 2017


This paper expands on the numerical simulation of entropy noise by performing a comparison of two commonly used models for resolving turbulent flow field: Large Eddy Simulation and Unsteady Reynolds Averaged Navier-Stokes. A brand new numerical procedure was developed allowing an accurate reproduction of two-dimensional spatial and temporal temperature variations of a non-uniform temperature profile. Experimental investigation was performed for the same non-uniform temperature profile, and comparison of the entropy noise level measured experimentally and evaluated numerically using the two models was performed. It was shown that Large Eddy Simulation allows a better prediction of entropy noise within the developed numerical procedure than Unsteady Reynolds Averaged Navier-Stokes.

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