Investigation of Phase-Lagged Boundary Conditions for Turbulence Resolving Turbomachinery Simulations
Paper i proceeding, 2020

The present work explores whether phase-lagged boundary conditions can be used to perform scale resolving simulations of turbomachines. The phase-lagged approach considered is based on storing the flow signal, both at the pitch-wise boundaries and the rotor-stator interface, as its temporal Fourier coefficients for a finite number of harmonics. The method is implemented in an in-house CFD solver, G3D::Flow, which can perform both URANS and hybrid RANS/LES simulations. In order to evaluate the performance of the phase-lagged boundary condition, a comparison is made with a sliding mesh simulation on a compressor cascade. Furthermore, the possibility of breaking an error feedback loop generated in the sampling process by including multiple blade passages is also investigated. It is found that this approach greatly improves convergence and accuracy of the sampling.

Författare

Gonzalo Montero Villar

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Daniel Lindblad

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Niklas Andersson

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Fluid Dynamics

AIAA Aviation 2020 Forum
Reno, Nevada, USA,

Validation of improved turbomachinery noise prediction models and development of novel design methods for fan stages with reduced broadband noise (TurboNoiseBB)

Europeiska kommissionen (Horisont 2020), 2016-09-01 -- 2020-02-29.

Styrkeområden

Transport

Ämneskategorier

Beräkningsmatematik

Strömningsmekanik och akustik

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.2514/6.2020-2982

Mer information

Senast uppdaterat

2020-06-18