The University of Southampton
University of Southampton Institutional Repository

Flow and noise predictions for a tandem cylinder configuration using novel hybrid RANS/LES approaches

Record type: Conference or Workshop Item (Paper)

The performance of several novel hybrid RANS/LES methodologies for accurate flow
and noise predictions of the NASA Tandem Cylinder Experiment are investigated. Simula-
tions are performed using three different hybrid RANS/LES methodologies which employ
different techniques to transform the baseline RANS model into a turbulence resolving
subgrid scale model. The approaches investigated are the Scale-Adaptive-Simulation which
computes the subgrid dissipation-rate from a transport equation that is sensitive to the v.
Karman length scale, the IDDES approach and a modifed Flow-Simulation-Methodology
(FSM) which both rely on replacing the modeled turbulent length scale with a measure
of the local grid spacing. Since we expect that the predictions in the RANS and LES
region depend on the capabilities of the baseline RANS model, the hybrid RANS/LES ap-
proaches used in this study are based on an Explicit-Algebraic-Stress Model. These models
are assessed and compared with formulations based on a traditional two-equation model.
The simulations are performed with the open-source finite volume code OpenFOAM and
acoustic predictions are obtained using an acoustic analogy based on Curle's theory. The
IDDES and FSM approaches were found to predict the hydrodynamic field in very good
agreement with reference data but showed some deficiencies in capturing the higher har-
monics in the acoustic spectra and broadband noise levels at high Strouhal numbers. The
SAS appraoches lack in accuracy for prediciting the hydrodynamic field but resolve the
higher harmonics in the acoustic spectra.

Full text not available from this repository.


Weinmann, M. and Sandberg, R.D. (2010) Flow and noise predictions for a tandem cylinder configuration using novel hybrid RANS/LES approaches At 16th CEAS/AIAA Aeroacoustics Conference, Sweden. 07 - 09 Jun 2010. 20 pp.

More information

Published date: 7 June 2010
Additional Information: AIAA 2010-3787
Venue - Dates: 16th CEAS/AIAA Aeroacoustics Conference, Sweden, 2010-06-07 - 2010-06-09
Organisations: Aerodynamics & Flight Mechanics


Local EPrints ID: 185781
PURE UUID: 2aef2e81-134f-4bc9-a799-922438cd238b

Catalogue record

Date deposited: 11 May 2011 08:20
Last modified: 18 Jul 2017 11:48

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.