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中文摘要: 气动力降阶模型是提高气动弹性振动分析速度的新方法。现有气动力降阶模型的研究主要集中在叶片和机翼的颤振方面，没有涉及尾流激励引起的叶片振动问题。基于小扰动理论，本文将上游尾流傅立叶分解为若干个谐波，分别计算各阶谐波对叶片气动力的扰动，通过线性叠加各扰动，建立了尾流激励的叶片气动力降阶模型。二维叶片的算例表明：本文建立的气动力降阶模型能够描述上游尾流引起的叶片气动力 的变化。
Abstract:Aerodynamic reduced order model ( aerodynamic ROM) is a new methodology for aeroelastic analyses. Nowadays， researches about aerodynamic ROM are focused on flutter of turbo-machinery blades or wings. There is no discussion about the aerodynamic forces of the turbo-machinery blades induced by upstream wakes，which are more common in turbo-machines and are more important to blades safety. In this paper，a ROM method is proposed for predicting aerodynamic forces induced by upstream wakes. In the method，the time-variant upstream wakes of flow fields are decomposed into harmonic waves by Fourier method;the aerodynamic forces of the blades due to the upstream wakes is calculated by superposing of the aerodynamic forces of blades due to the harmonic waves. An example of 2D blade is used to verify the proposed method. The results showthat the proposed method is feasible.
keywords: wake aerodynamic ROM blade Fourier decomposition
文章编号： 中图分类号：TK472 文献标志码：
基金项目:
| 作者 | 单位 |
| 罗 骁 | 中北大学 机电工程学院，太原 030051 |
| 李立州 | 中北大学 机电工程学院，太原 030051 |
| 杨明磊 | 中北大学 机电工程学院，太原 030051 |
| 张 珺 | 太原学院 数学系，太原 030001 |
| 原梅妮 | 中北大学 机电工程学院，太原 030051 |
引用文本：
作者.题名[J].刊名,出版年份,卷号(期号):起止页码.
[2]KIM K M, PARK J S, DONG H L, et al. Analysis of conjugated heat transfer, stress and failure in a gas turbine blade with circular cooling passages[J]. Engineering Failure Analysis, 2011, 18(4):1212-1222.
作者.题名[J].刊名,出版年份,卷号(期号):起止页码.
[2]KIM K M, PARK J S, DONG H L, et al. Analysis of conjugated heat transfer, stress and failure in a gas turbine blade with circular cooling passages[J]. Engineering Failure Analysis, 2011, 18(4):1212-1222.