Application of a new one-equation turbulence model based on k-ω closure to flow in S-ducts

Xu Han, Timothy J. Wray, Colin Fiola, Ramesh K. Agarwal

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Hie focus of this paper is on validation and application of a new one equation eddy viscosity model derived from k-eo closure for three-dimensional flows in serpentine difrusers (S-ducts). The S-duct’s geometry produces streamline curvature and an adverse pressure gradient resulting in flow separation. Two S-duct geometries are employed in this investigation - one was used in an experimental study conducted at NASA Glenn Research Center in the early 1990‘s and the other is a benchmark configuration proposed by AIAA Propulsion Aerodynamics Workshop (PAW7). The CFD flow solver ANSYS Fluent is used for flow calculations. Results from the new model, the commonly used Spalart-Alhnaras (SA) and the Shear-Stress-Transport (SST) k-ω models are compared to the available experimental data.

Original languageEnglish
Title of host publication53rd AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103438
StatePublished - 2015
Event53rd AIAA Aerospace Sciences Meeting, 2015 - Kissimmee, United States
Duration: Jan 5 2015Jan 9 2015

Publication series

Name53rd AIAA Aerospace Sciences Meeting


Conference53rd AIAA Aerospace Sciences Meeting, 2015
Country/TerritoryUnited States


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