On the Use of Atmospheric Boundary Conditions for Axial-Flow Compressor Stall Simulations

Journal of Turbomachinery - Tập 127 Số 2 - Trang 349-351 - 2005
Mehdi Vahdati1, A. I. Sayma1, Christopher Freeman2, M. Imregun1
1Mechanical Engineering Department, Imperial College, Exhibition Road, London SW7 2BX, UK
2Rolls-Royce plc, PO Box 31, Moor Lane, Derby DE24 8BJ, UK

Tóm tắt

Abstract 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.

Từ khóa


Tài liệu tham khảo

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Longley, Stability of Flow Through Multi-stage Axial Compressors, ASME J. Turbomach., 112, 126, 10.1115/1.2927409

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Thông tin xuất bản

Journal of Turbomachinery

Tập 127 Số 2

349-351

Thông tin tác giả