叶轮机周期性非定常流高效降阶数值计算方法研究进展

Progress in Efficient Reduced Order Methods for Temporal Periodic Unsteady Flows Within Turbomachinery

关键词:  降阶数值计算方法  非定常流动  周期性  气动弹性力学  叶轮机  综述

Key words:  Reduced order methods  Unsteady flows  Periodicity  Aeroelasticity  Turbomachinery  Review

摘要:

简要介绍了叶轮机内非定常流对叶轮机性能的重要影响，总结了叶轮机内动静相干和叶片振动诱发的非定常流的时空周期性特点，并指出这些时空周期性特点可以加以利用， 发展分析这些非定常流的高效降阶数值计算方法。本文根据不同数值降阶方法的特点对其进行了归类，详细分析了各自的优缺点及在气动弹性力学领域的应用，并进一步展望了降阶数值方法在未来的几个关键技术及发展趋势。

Abstract:

The paper starts with a brief introduction of the significant influence of unsteady flows on turbomachinery performance， then summarizes the time and space periodicities of turbomachinery unsteady flows arising from blade row interaction and blade vibration. The time and space periodicities can be made use of to develop efficient reduced order numerical methods for analysing these unsteady flows. This paper classifies these reduced order methods based upon their own features and provides detailed discussions about their pros and cons and their applications in turbomachinery aeroelasticity. Finally， the key technologies and the future development prospects of reduced order methods are outlined.