On the use of atmospheric boundary conditions for axial-flow compressor stall simulations

Vahdati, M, Sayma, A I, Freeman, C and Imregun, M (2005) On the use of atmospheric boundary conditions for axial-flow compressor stall simulations. Journal of Turbomachinery, 127 (2). pp. 349-351. ISSN 0889-504X

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This paper describes a novel way of prescribing computational fluid dynamics (CFD) boundary conditions for axial-flow compressors. The approach is based on extending the standard single passage computational domain by adding an intake upstream and a variable nozzle downstream. Such a route allows us to consider any point on a given speed characteristic by simply modifying the nozzle area, the actual boundary conditions being set to atmospheric ones in all cases. Using a fan blade, it is shown that the method not only allows going past the stall point but also captures the typical hysteresis loop behavior of compressors.

Item Type: Article
Additional Information: This paper presents a new methodology to handle the uncertain boundary conditions during the simulations of flow in turbomachinery fans and compressors. The methodology was implemented in the AU3D code which is widely used at Rolls-Royce for the prediction of performance, flutter and forced response during the design process. It has a significant impact on the accuracy of computations and several other aero-engine manufactures subsequently implemented the method in their systems. Their implementation was presented in the recent ASME Turbo expo conference in Barcelona (May 2006). For more information, contact Steve Lee from Rolls-Royce: Tel: 01179794520.
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Naser Sayma
Date Deposited: 06 Feb 2012 19:56
Last Modified: 30 Mar 2012 11:59
URI: http://sro.sussex.ac.uk/id/eprint/23092
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