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首页> 外文期刊>Journal of turbomachinery >Assessment of Various Turbulence Models in a High Pressure Ratio Centrifugal Compressor With an Object Oriented CFD Code
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Assessment of Various Turbulence Models in a High Pressure Ratio Centrifugal Compressor With an Object Oriented CFD Code

机译：面向对象CFD代码的高压比离心压缩机中各种湍流模型的评估

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摘要

The flow field in a high pressure ratio centrifugal compressor with a vane less diffuser has been investigated numerically. The main goal is to assess the influence of various turbulence models suitable for internal flows with an adverse pressure gradient. The numerical analysis is performed with a 3D RANS in-house modified solver based on an object-oriented open-source library. According to previous studies from varying authors, the turbulence model is believed to be the key parameter for the discrepancy between experimental and numerical results, especially at high pressure ratios and high mass-flow. Particular care has been taken at the wall, where a detailed integration of the boundary layer has been applied. The results present different comparisons between the models and experimental data, showing the influence of using advanced turbulence models. This is done in order to capture the boundary layer behavior, especially in large adverse pressure gradient single stage machinery.
机译：数值研究了无叶扩压器的高压比离心压缩机的流场。主要目标是评估适用于内部流具有不利压力梯度的各种湍流模型的影响。使用基于面向对象的开源库的3D RANS内部修改的求解器进行数值分析。根据不同作者的先前研究，湍流模型被认为是实验和数值结果之间差异的关键参数，特别是在高压比和高质量流量下。在墙壁上已特别注意，已对边界层进行了详细的整合。结果显示了模型与实验数据之间的不同比较，显示了使用高级湍流模型的影响。这样做是为了捕获边界层行为，尤其是在大型逆压梯度单级机械中。

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  • 来源
    《Journal of turbomachinery》 |2012年第6期|p.061033.1-061033.10|共10页
  • 作者

    Luca Mangani; Ernesto Casartelli; Sebastiano Mauri;

  • 作者单位

    Lucerne University of Applied Sciences and Arts, Technik & Architektur, Technikumstrasse 21, Horw, 6048, Switzerland;

    Lucerne University of Applied Sciences and Arts, Technik & Architektur, Technikumstrasse 21, Horw, 6048, Switzerland;

    Aerodynamics Compressors, MAN Diesel & Turbo Schweiz AG, Hardstrasse 319, Zuerich, 8005, Switzerland;

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