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 (LES) and unsteady Reynolds-averaged Navier–Stokes (URANS). A brand new numerical procedure was developed allowing an accurate reproduction of two-dimensional spatial and temporal temperature variations of a nonuniform temperature profile. Experimental investigation was performed for the same nonuniform 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 URANS.
Issue Section:
Fundamental Issues and Canonical Flows
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