LES and DES of swirling flow with rotor-stator interaction
Paper i proceeding, 2014

A highly swirling turbulent flow engendered by the rotor-stator interaction of a swirl generator is investigated using LES and DES. The delayed DES Spalart-Allmaras (DDES-SA), improved DDES-SA, shear stress transport DDES, and a dynamic k-equation LES are studied. A mesh sensitivity study is performed on the hybrid methods, including the ability of captur-ing the details of the flow field. It is shown that all methods are capable of predicting the large-scale flow features, e.g. the vortex breakdown and the corresponding on-axis recirculation region. It is also shown that all hybrid methods capture most of the small-scale coherent structures, even with a relatively coarse mesh resolution. The various shielding functions of the hybrid methods are analyzed, distinguishing the location of the transition between RANS and LES mode.

Författare

Ardalan Javadi

Chalmers, Tillämpad mekanik, Strömningslära

Håkan Nilsson

Chalmers, Tillämpad mekanik, Strömningslära

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

1612-2909 (ISSN) 1860-0824 (eISSN)

Vol. 130 457-468

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Ämneskategorier

Strömningsmekanik och akustik

DOI

10.1007/978-3-319-15141-0_37

ISBN

978-3-319-15141-0