期刊
COMPUTERS & MATHEMATICS WITH APPLICATIONS
卷 79, 期 6, 页码 1687-1705出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.camwa.2019.09.025
关键词
Wet-steam flow; Turbine cascades; NURBS surface; Isogeometric analysis; Finite volume method
资金
- BCAM Severo Ochoa accreditation of excellence, Spain [SEV-2017-0718]
- Basque Government
The isogeometric finite volume analysis is utilized in this research to numerically simulate the two-dimensional viscous wet-steam flow between stationary cascades of a steam turbine for the first time. In this approach, the analysis-suitable computational mesh with curved boundaries is generated for the fluid flow by employing a non-uniform rational B-spline (NURBS) surface that describes the cascade geometry, and the governing equations are then discretized by the NURBS representation. Thanks to smooth and accurate geometry representation of the NURBS formulation, the employed isogeometric framework not only resolves issues concerning the conventional mesh generation techniques of the finite volume method in steam turbine problems, but also, as validated against well-established experiments, significantly improves the accuracy of the numerical solution. In addition, the shock location in the cascade is predicted and tracked with a sufficient accuracy. (C) 2019 Elsevier Ltd. All rights reserved.
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