离心压气机蜗壳非轴对称性影响的研究
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摘要
本文首先对一台1.5级离心压气机进行非定常数值模拟研究蜗壳非轴对称性对该压气机内部流动的影响结果表明:受蜗壳非轴对称几何影响,压气机内部的瞬态流场呈非轴对称分布,蜗舌的非定常干涉向上游延伸至叶轮进口;叶轮叶片表面的动态压力在蜗舌附近脉动幅值最大,其频域特征揭示该压力主要受蜗舌通过频率与扩压器叶片通过频率影响,且蜗舌影响最大。同时,采用旋转遥测系统测量实验压气机叶轮叶片表面的动态压力,对数值研究结果进行了验证,为离心压气机的优化提供了设计依据。
The unsteady numerical simulation was carried out in a 1.5-stage centrifugal compressor to investigate the effects of the volute. It was found that, under the impact of the volute's non-axisymmetrical geometry, the flow field in the compressor demonstrated a non-axisymmetrical distribution and the unsteady effect arising from the volute could reach upstream till the impeller inlet. The pressure fluctuation on the impeller blade surface would be the highest close to the volute tongue. The frequency-domain analysis showed that the unsteady pressures on the impeller blade were mainly influenced by the passing frequencies of the diffuser blade and the volute,especially by that of the latter. Additionally, the unsteady pressure on impeller blade surface was measured by a novel Rotating Telemetry Measurement System and the numerical results were verified.The conclusions in the paper could provide a basis for the optimization design of centrifugal compressor.
The unsteady numerical simulation was carried out in a 1.5-stage centrifugal compressor to investigate the effects of the volute. It was found that, under the impact of the volute's non-axisymmetrical geometry, the flow field in the compressor demonstrated a non-axisymmetrical distribution and the unsteady effect arising from the volute could reach upstream till the impeller inlet. The pressure fluctuation on the impeller blade surface would be the highest close to the volute tongue. The frequency-domain analysis showed that the unsteady pressures on the impeller blade were mainly influenced by the passing frequencies of the diffuser blade and the volute,especially by that of the latter. Additionally, the unsteady pressure on impeller blade surface was measured by a novel Rotating Telemetry Measurement System and the numerical results were verified.The conclusions in the paper could provide a basis for the optimization design of centrifugal compressor.
引文
[1] Xu C, Amano R S. Investigation of the Flow in Centrifugal Compressor Volute[R]. ASME Paper GT2008-50936,2008
[2] Ayder E, Van B R. Experimental Study of the Swirling Flow in the Internal Volute of a Centrifugal Compressor[R]. ASME Paper 91-GT-7, 1991
[3] Ayder E, Van B R, Brasz J. Experimental and Theoretical Analysis of the flow in a Centrifugal Compressor Volute[J]. Journal of Turbomachinery, 1993, 115(3):582-589
[4] Ayder E, Van B R. Numerical Analysis of the ThreeDimensional Swirling Flow in Centrifugal Compressor Volutes[J]. Journal of Turbomachinery, 1994, 116(3):462-468
[5] Fatsis A, Pierret S, Van B R. Three-dimensional Unsteady Flow and Forces in Centrifugal Impellers with Circumferential Distortion of the Outlet Static Pressure[J]. Journal of Turbomachinery, 1997, 119(1):94-102
[6] Hagelstein D, Van D B, Keiper R and Rautenberg M. Experimental Investigation of the Circumferential Pressure Distortion in Centrifugal Compressor Stages[R]. ASME Paper, 97-GT-50, 1997
[7] Sorokes J M, Borer C J, Koch J M. Investigation of the Circumferential Static Pressure Non-Uniformity Causedby a Centrifugal Compressor Discharge Volute[R]. ASME Paper 98-GT-326, 1998
[8] Hilleweart K, Van B R. Numerical Simulation of ImpellerVolute Interaction in Centrifugal Compressors[J]. Journal of Turbomachinery, 1999, 121(3):603-608
[9] Gu F, Engeda A. A Numerical Investigation on the Volute/Impeller Steady-state Interaction Due to Circumferential Distortion[R]. ASME Paper GT2001-0328, 2001
[10] Gu F, Engeda A, Cave M, et al. A Numerical Investigation on the Volute/Diffuser Interaction Due to the Axial Distortion at the Impeller Exit[R]. Journal of Fluids Engineering, 2001, 123(3):475-483
[11] Yang M, Zheng X, Zhang Y, et al. Stability Improvement of High-pressure-ratio Turbocharger Centrifugal Compressor by Asymmetric flow Control, Part I:Non-Axisymmetrical flow in Centrifugal Compressor[R].ASME Paper GT2010-22581, 2010
[12] Zheng X, Zhang Y, Yang M, et al. Stability Improvement of High-pressure-ratio Turbocharger Centrifugal Compressor by Asymmetric flow Control Part II:NonAxisymmetric Self Recirculation Casing Treatment[R].ASME Paper GT2010-22582, 2010
[13] Yang M, Zheng X, Zhang Y, et al. Stability Improvement of High-pressure-ratio Turbocharger Centrifugal Compressor by Asymmetric flow Control, Part I:Nonaxisymmetrical flow in Centrifugal Compressor[J]. Journal of Turbomachinery, 2013, 135(2):021006
[14] Zheng X,Lin Y, Zhuge W, et al. Stability Improvement of Turbocharger Centrifugal Compressor by Asymmetric Vaneless Diffuser Treatment[R]. ASME Paper GT2013-94705, 2013
[15] Masaru U, Xinqian Z, Yangjun Z. Effect of Circumferencial Static Pressure non-uniformity Caused by a Volute on flow in High Pressure Ratio Centrifugal Compressor with Vanless and Vaned Diffuser[R]. ASME Paper GT2013-95263, 2013
[2] Ayder E, Van B R. Experimental Study of the Swirling Flow in the Internal Volute of a Centrifugal Compressor[R]. ASME Paper 91-GT-7, 1991
[3] Ayder E, Van B R, Brasz J. Experimental and Theoretical Analysis of the flow in a Centrifugal Compressor Volute[J]. Journal of Turbomachinery, 1993, 115(3):582-589
[4] Ayder E, Van B R. Numerical Analysis of the ThreeDimensional Swirling Flow in Centrifugal Compressor Volutes[J]. Journal of Turbomachinery, 1994, 116(3):462-468
[5] Fatsis A, Pierret S, Van B R. Three-dimensional Unsteady Flow and Forces in Centrifugal Impellers with Circumferential Distortion of the Outlet Static Pressure[J]. Journal of Turbomachinery, 1997, 119(1):94-102
[6] Hagelstein D, Van D B, Keiper R and Rautenberg M. Experimental Investigation of the Circumferential Pressure Distortion in Centrifugal Compressor Stages[R]. ASME Paper, 97-GT-50, 1997
[7] Sorokes J M, Borer C J, Koch J M. Investigation of the Circumferential Static Pressure Non-Uniformity Causedby a Centrifugal Compressor Discharge Volute[R]. ASME Paper 98-GT-326, 1998
[8] Hilleweart K, Van B R. Numerical Simulation of ImpellerVolute Interaction in Centrifugal Compressors[J]. Journal of Turbomachinery, 1999, 121(3):603-608
[9] Gu F, Engeda A. A Numerical Investigation on the Volute/Impeller Steady-state Interaction Due to Circumferential Distortion[R]. ASME Paper GT2001-0328, 2001
[10] Gu F, Engeda A, Cave M, et al. A Numerical Investigation on the Volute/Diffuser Interaction Due to the Axial Distortion at the Impeller Exit[R]. Journal of Fluids Engineering, 2001, 123(3):475-483
[11] Yang M, Zheng X, Zhang Y, et al. Stability Improvement of High-pressure-ratio Turbocharger Centrifugal Compressor by Asymmetric flow Control, Part I:Non-Axisymmetrical flow in Centrifugal Compressor[R].ASME Paper GT2010-22581, 2010
[12] Zheng X, Zhang Y, Yang M, et al. Stability Improvement of High-pressure-ratio Turbocharger Centrifugal Compressor by Asymmetric flow Control Part II:NonAxisymmetric Self Recirculation Casing Treatment[R].ASME Paper GT2010-22582, 2010
[13] Yang M, Zheng X, Zhang Y, et al. Stability Improvement of High-pressure-ratio Turbocharger Centrifugal Compressor by Asymmetric flow Control, Part I:Nonaxisymmetrical flow in Centrifugal Compressor[J]. Journal of Turbomachinery, 2013, 135(2):021006
[14] Zheng X,Lin Y, Zhuge W, et al. Stability Improvement of Turbocharger Centrifugal Compressor by Asymmetric Vaneless Diffuser Treatment[R]. ASME Paper GT2013-94705, 2013
[15] Masaru U, Xinqian Z, Yangjun Z. Effect of Circumferencial Static Pressure non-uniformity Caused by a Volute on flow in High Pressure Ratio Centrifugal Compressor with Vanless and Vaned Diffuser[R]. ASME Paper GT2013-95263, 2013
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