A Flow Analysis for a Turning Rapid Contraction using CFD
Date
2008
Authors
Cheung, John Chun Kuen
Nguyen, Cuong K.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Proceedings of the Fourth International Conference on Advances in Wind and Structures (AWAS '08), 29-31 May, 2008, Seogwipo KAL Hotel, Jeju, Korea, 2008
Statement of Responsibility
John C. K. Cheung; Cuong K. Nguyen
Conference Name
International Conference on Advances in Wind and Structures (4th : 2008 : Jeju, Korea)
Abstract
Following the development of the turning rapid diffuser using CFD analyses in 2006, another
analysis is carried out for a turning rapid contraction as required in the design process for wind
tunnels. This is similar to the benchmark problem investigated at the 1994 annual meeting of the
World User Association in Applied Computational Fluid Dynamics for the turbulent flow in an
axi-symmetric 180° narrowing bend. However, the present investigation is three dimensional
with rectangular cross-sections. A parametric investigation using ANSYS CFX 10 has found
that the flow is mostly attached to the sidewalls of the contraction, which does not use any guide
vanes. Therefore the use of turning rapid contraction concept in the design of close circuit wind
tunnels would be more cost effective, in terms of flow quality and fan power requirements, than
the use of traditional turning vanes in the wind tunnel circuit bends.
School/Discipline
School of Mechanical Engineering