| 一种基于CFD的叶轮机非定常气动力组合建模方法 |
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| 引用本文： | 张伟伟,苏丹,张陈安,叶正寅,刘锋.一种基于CFD的叶轮机非定常气动力组合建模方法[J].推进技术,2012,33(1):37-42. |
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| 作者姓名： | 张伟伟 苏丹 张陈安 叶正寅 刘锋 |
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| 作者单位： | 1. 西北工业大学翼型、叶栅空气动力学国防科技重点实验室,陕西西安,710072
2. 西北工业大学翼型、叶栅空气动力学国防科技重点实验室,陕西西安710072／加州大学尔湾分校机械与宇航工程系,美国加利福尼亚州 |
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| 基金项目： | 西北工业大学基础研究基金，教育部博士点基金 |
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| 摘 要： | 为了获得一个准确高效的非定常空气动力学模型并将其应用于叶轮机叶片颤振特性分析中去,论文发展了一种基于CFD方法的叶轮机非定常气动力组合建模方法,可以快速计算叶轮机叶片在等相角差振动时的气动阻尼系数。运用小扰动流场的叠加原理,通过不同通道数模型的非定常流场求解(通常需要两次或三次),针对流场的周期性边界条件,组合分析得到一系列更多通道数情况下的非定常气动力低阶模型。基于这种降阶模型计算的气动阻尼系数与直接的CFD方法计算结果吻合很好,计算效率提高10倍以上。
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| 关 键 词： | 颤振 降阶模型 计算流体力学 叶轮机 |
| 收稿时间： | 2010/9/19 0:00:00 |
| 修稿时间： | 2011/2/16 0:00:00 |
A CFD-Based Compositional Methodology of Unsteady Aerodynamic Modeling for Turbomachinery |
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| ZHANG Wei-wei,SU Dan,ZHANG Chen-an,YE Zheng-yin and LIU Feng.A CFD-Based Compositional Methodology of Unsteady Aerodynamic Modeling for Turbomachinery[J].Journal of Propulsion Technology,2012,33(1):37-42. |
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| Authors: | ZHANG Wei-wei SU Dan ZHANG Chen-an YE Zheng-yin and LIU Feng |
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| Institution: | 1,2(1.National Key Laboratory of Aerodynamic Design and Research,Northwestern Polytechnical University,Xi’an 710072,China; 2.Department of Mechanical and Aerospace Engineering,University of California,Irvine CA 92697-3975,USA) |
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| Abstract: | Direct CFD method was used in the analysis of flutter characteristics for blades of turbomachinery,and its main trouble was the relative computational effort.The present paper introduces a CFD-based compositional modeling methodology of unsteady aerodynamics for turbomachinery that can compute the aerodamping coefficients of vibrating turbine blades with equal Inter-Blade-Phase-Angle.Several unsteady CFD computations with different number of blade passages are needed for the construction of the Reduce-Order-Model(ROM).Following the superposition principle of small disturbance flow and the periodicity of the flow field of turbomachinery,a series of unsteady aerodynamic ROMs with more blade passages are acquired by solving mirror equations.The aeroelastic characteristics of Standard Test Configuration-4(STCF-4) are analyzed by using this method.The results are compared with that attained by direct CFD method and ROM with single CFD computation.They agree well with each other.By applying this new ROM,the computational efficiency is improved by ten times,compared with direct CFD method while remaining the precision. |
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| Keywords: | Flutter ROM CFD Tubomachinery |
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