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On the application of isogeometric finite volume method in numerical analysis of wet-steam flow through turbine

机译：等几何有限体积法在湿汽轮机流场数值分析中的应用

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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.
机译：本研究利用等几何有限体积分析首次对汽轮机固定级联之间的二维粘性湿蒸汽流动进行了数值模拟。在这种方法中，通过使用描述级联几何形状的非均匀有理B样条（NURBS）曲面为流体流动生成具有“弯曲”边界的适合分析的计算网格，然后将控制方程式离散化。 NURBS表示形式。由于NURBS公式的平滑准确的几何表示，所采用的等几何框架不仅解决了有关汽轮机问题中有限体积方法的常规网格生成技术的问题，而且还针对成熟的实验进行了验证，从而显着改善了数值解的精度。另外，以足够的精度预测和跟踪级联中的冲击位置。 （C）2019 Elsevier Ltd.保留所有权利。

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