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Analysis on Aerodynamic Stability of Blades by an Efficient Fluid-Structure Coupling Method

机译：高效流体结构耦合法分析叶片的空气动力稳定性

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Poor calculation efficiency is a major issue in the investigation of time-domain aerodynamics of turbomachinery bladings by fluid-structure coupling. In this work, a numerical methodology for 3D time-domain fluid-structure coupling analysis was carried out to investigate aerodynamic stability of blades. Based on an assumptive gross elastic structure, the computational fluid dynamics (CFD) mesh-deformation is generated effectively, while the structural response is calculated using a modal approach. Accuracy of the method is validated by the traditional two-way fluid-structure interaction (FSI) approach on ANSYS Workbench and the literature, while computational efficiency is improved notably. The flutter boundary of the compressor at rotating speeds ranging from 100% to 80% was performed. When the flow rate is low enough, the second-order modal response is more likely to run into surge than the first-order modal response. The aerodynamic characteristics of the blades on two interblade phase angles (IBPAs) were also studied. The results indicate a much more significant increase in aerodynamic stability at 180 degrees IBPA than that at 0 degrees IBPA. (C) 2021 American Society of Civil Engineers.
机译：计算效率差是通过流体结构耦合调查涡轮机械坯时的时域空气动力学的一个主要问题。在这项工作中，进行了一种用于3D时域流体结构耦合分析的数值方法，以研究叶片的空气动力学稳定性。基于假设总弹性结构，有效地产生计算流体动力学（CFD）网格变形，而使用模态方法计算结构响应。通过在ANSYS工作台和文献中的传统双向流体结构相互作用（FSI）方法验证该方法的准确性，虽然计算效率显着提高。进行从100％至80％的旋转速度下的压缩机的颤振边界。当流速足够低时，二阶模态响应比一阶模态响应更可能陷入浪涌。还研究了两个斜面相角（IBPAS）上的叶片的空气动力学特性。结果表明，在180摄氏度下的空气动力学稳定性的显着增加比0度IBPA在0摄氏度下的更大增加。 （c）2021年美国土木工程师协会。

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  • 来源
    《Journal of aerospace engineering》 |2021年第6期|04021088.1-04021088.13|共13页
  • 作者

    Mingda Yu; Juan Du; Xuejiao Shao; Lu Jiang;

  • 作者单位

    Nucl Power Inst China Key Lab Nucl Reactor Syst Design Technol 328 Sect 1 Changshun Ave Chengdu 610213 Peoples R China;

    Nucl Power Inst China Key Lab Nucl Reactor Syst Design Technol 328 Sect 1 Changshun Ave Chengdu 610213 Peoples R China;

    Nucl Power Inst China Key Lab Nucl Reactor Syst Design Technol 328 Sect 1 Changshun Ave Chengdu 610213 Peoples R China;

    Nucl Power Inst China Key Lab Nucl Reactor Syst Design Technol 328 Sect 1 Changshun Ave Chengdu 610213 Peoples R China;

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