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

journal contribution
posted on 2023-06-08, 00:38 authored by M Vahdati, A I Sayma, C Freeman, M Imregun
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.

History

Publication status

  • Published

Journal

Journal of Turbomachinery

ISSN

0889-504X

Issue

2

Volume

127

Page range

349-351

Pages

3.0

Department affiliated with

  • Engineering and Design Publications

Notes

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.

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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