Simulation of flow around aerofoil with DES model of turbulence
Mathematics. Physics. Mechanics
Аuthors1*, 1, 2**, 2***, ****
1. University of Liverpool, England, United Kingdom, Liverpool, L69 3BX
2. Kazan National Research Technical University named after A.N. Tupolev, KNRTU-KAI, 10, Karl Marks str., Kazan, 420111, Russia
AbstractCFD predictions of aerodynamic loads could be improved by resolving a larger part of the turbulent flow spectrum. Mainstream CFD methods, currently in routine use employ the URANS approach that is inherently limited in terms of the size and frequency of the resolved flow structures. This paper attempts to apply hybrid methods of turbulence modeling and simulation aiming to resolve a larger part of the flow spectrum. Results for several DES closures are presented for the flow around a stalled aerofoil. The calculations reveal some of the advantages of DES over URANS as well as some of the performance issues associated with DES. The limitations of the available experiments for CFD validation are also highlighted.
Keywords:aerofoil; URANS and DES turbulence models; Q-criterion; power spectral density