首页> 外文期刊>Journal of Engineering for Gas Turbines and Power >Discussion: 'Rotordynamic Force Prediction of Centrifugal Compressor Impellers Using Computational Fluid Mechanics'
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Discussion: 'Rotordynamic Force Prediction of Centrifugal Compressor Impellers Using Computational Fluid Mechanics'

机译:讨论:“使用计算流体力学预测离心式压缩机叶轮的转子动力”

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The authors are to be commended for an interesting demonstration of computational fluid dynamics (CFD) methods in the analysis of rotordynamic forces for impellers in centrifugal compressors. CFD approaches clearly represent the future for this important calculation. As they state, data are vitally needed to anchor predictions for impeller coefficients for compressors. In fact, better data would also be helpful for pump impellers. The data of Bolleter et al. [4] yield whirl frequency ratios that range upward from 0.75 to 2.2. To the extent that the destabilizing forces arise from fluid rotation, WFR cannot exceed the average circumferential velocity ratio, and more reasonable values would be on the order of 0.5 (as predicted by the authors).
机译:在计算流体动力学(CFD)方法对离心式压缩机叶轮的转子动力进行分析时,作者将受到赞扬。 CFD方法显然代表了这一重要计算的未来。正如它们所说的那样,非常需要数据来锚定压缩机叶轮系数的预测。实际上,更好的数据对泵轮也有帮助。 Bolleter等人的数据。 [4]产生的旋转频率比范围从0.75到2.2向上。如果破坏力是由流体旋转引起的,则WFR不能超过平均圆周速度比,而更合理的值应在0.5的数量级上(如作者所预测)。

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