一种基于CFD的叶轮机非定常气动力组合建模方法
A CFD-Based Compositional Methodology of Unsteady Aerodynamic Modeling for Turbomachinery
查看参考文献16篇
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文摘
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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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其他语种文摘
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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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来源
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推进技术
,2012,33(1):37-42 【核心库】
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关键词
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颤振
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降阶模型
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计算流体力学
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叶轮机
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地址
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4055 |
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学科
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航空 |
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基金
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国家教育部高等学校博士学科点专项科研基金
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西北工业大学基础研究基金
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文献收藏号
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CSCD:4467323
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参考文献 共
16
共1页
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