Assessment of Effect of Flux Scheme and Turbulence Model on Blade-to-blade Calculations

IF 1.1 4区工程技术 Q4 MECHANICS

Journal of Applied Fluid Mechanics Pub Date : 2024-07-01 DOI:10.47176/jafm.17.7.2234

M. Bilgiç, Ö. U. Baran, M. Aksel

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Abstract

Today, due to advances in computing power, Reynolds Averaged Navier-Stokes (RANS) solvers are widely preferred for quasi-three-dimensional (Q3D) blade-to-blade analysis. This study investigates the performance of different flux calculation methods and turbulence models with a density-based RANS solver (Numeca®) in blade-to-blade analysis. A block-structured mesh topology is used to create a solution grid around the airfoil. Spatial discretization is performed in the pitchwise direction to represent the quasi three-dimensional flow, while only one computational cell is used in the radial direction to simulate the flow through the Q3D cascade. The computational grid around the airfoil is created with the Autogrid® tool using the block mesh topology. For the convective flow calculations, both the central and upwind methods available in Numeca® are applied separately. The Baldwin Lomax (BL), Spalart Allmaras (SA), Shear Stress Transport (SST), Explicit Algebraic Reynolds Stress Model (EARSM) and k-ε (KEPS) turbulence models are used for the turbulent shear stress calculations. In order to evaluate the aerodynamic performance of the spatial discretization methods and turbulence models, the isentropic Mach distribution on the airfoil surface, the total pressure loss and the exit flow angle behind the blade are compared with the experimental data of six test cases. In the compressor cases

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评估通量方案和湍流模型对叶片间计算的影响

如今，由于计算能力的进步，雷诺平均纳维-斯托克斯（RANS）求解器已成为准三维（Q3D）叶片对叶片分析的广泛首选。本研究调查了不同通量计算方法和湍流模型与基于密度的 RANS 求解器（Numeca®）在叶片对叶片分析中的性能。采用块状结构的网格拓扑来创建机翼周围的求解网格。在俯仰方向上进行空间离散化以表示准三维流动，而在径向方向上仅使用一个计算单元来模拟通过 Q3D 级联的流动。机翼周围的计算网格由 Autogrid® 工具使用块网格拓扑创建。在对流计算中，分别采用了 Numeca® 中的中心法和上风法。湍流剪应力计算采用了 Baldwin Lomax (BL)、Spalart Allmaras (SA)、剪应力传输 (SST)、显式代数雷诺应力模型 (EARSM) 和 k-ε (KEPS) 湍流模型。为了评估空间离散化方法和湍流模型的气动性能，将机翼表面的等熵马赫分布、总压力损失和叶片后的出口流角与六个试验案例的实验数据进行了比较。在压缩机案例中

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .