| NUMERICAL STUDY ON THE UNSTEADY INTERACTION FLOW IN A CENTRIFUGAL COMPRESSOR STAGE |
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| 作者姓名： | Zhou Li Xi GuangSchool of Energy and Power Engineering Xi'an Jiaotong University Xi'an ChinaGao LiminSchool of Science Xi'an Jiaotong University Xi'an ChinaWang ShangjinSchool of Energy and Power Engineering Xi'an Jiaotong University Xi'an China |
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| 作者单位： | Zhou Li Xi GuangSchool of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 710049，ChinaGao LiminSchool of Science，Xi'an Jiaotong University，Xi'an 710049，ChinaWang ShangjinSchool of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 710049，China |
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| 基金项目： | ThisprojectissupportedbyNationalNaturalScienceFoundationofChina(No.50276047). |
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| 摘 要： | Numerical simulation on the unsteady flow in a centrifugal compressor is performed, and compared with the experimental data. The influence of the impeller-diffuser interaction on the flow-fields is discussed, and the reasons for the losses are also explored. Results show that qualitative and quite fair quantitative agreements are achieved between the predicted and measured flowfields. The influence of the impeller wake on the convexity surface of diffuser is great. The potential repercussion of the diffuser on the suction surface of the impeller is much larger than on the pressure surface. Effect of the unsteady interaction is strongest in the radial gap. The unsteady flow itself may compensate for the loss generated in stage, and the stage efficiency is inversely proportional to the entropy production.
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| 关 键 词： | 叶轮-扩散器 交互作用 不稳定性 流场力学 计算框架 |
NUMERICAL STUDY ON THE UNSTEADY INTERACTION FLOW IN A CENTRIFU-GAL COMPRESSOR STAGE |
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| Zhou Li Xi GuangSchool of Energy and Power Engineering,Xi''''an Jiaotong University,Xi''''an ,ChinaGao LiminSchool of Science,Xi''''an Jiaotong University,Xi''''an ,ChinaWang ShangjinSchool of Energy and Power Engineering,Xi''''an Jiaotong University,Xi''''an ,China.NUMERICAL STUDY ON THE UNSTEADY INTERACTION FLOW IN A CENTRIFUGAL COMPRESSOR STAGE[J].Chinese Journal of Mechanical Engineering,2004,17(4):609-613. |
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| Authors: | ZhouLi XiGuang GaoLimin WangShangjin |
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| Abstract: | Numerical simulation on the unsteady flow in a centrifugal compressor is performed, and compared with the experimental data. The influence of the impeller-diffuser interaction on the flow-fields is discussed, and the reasons for the losses are also explored. Results show that qualitative and quite fair quantitative agreements are achieved between the predicted and measured flowfields. The influence of the impeller wake on the convexity surface of diffuser is great. The potential repercussion of the diffuser on the suction surface of the impeller is much larger than on the pressure surface. Effect of the unsteady interaction is strongest in the radial gap. The unsteady flow itself may compensate for the loss generated in stage, and the stage efficiency is inversely proportional to the entropy production. |
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| Keywords: | Impeller-diffuser interaction Unsteady Loss |
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