| Computational and Experimental Study of Pinch on the Performance of a Vaneless Diffuser in a Centrifugal Compressor |
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| 作者姓名： | T.Turunen-Saaresti A.Reunanen J.Larjola |
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| 作者单位： | Lappeenranta University of Technology Department of Energy and Environmental Technology，Lappeenranta，Finland teemu，Lappeenranta University of Technology，Department of Energy and Environmental Technology，Lappeenranta，Finland teemu，Lappeenranta University of Technology，Department of Energy and Environmental Technology，Lappeenranta，Finland teemu |
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| 摘 要： | This study focuses on the vaneless diffuser of a centrifugal compressor.The examined stage consists of an un-shrouded impeller,a parallel wall vaneless diffuser and a volute.The walls of the diffuser were movable allowingdifferent pinch configurations to be investigated.The baseline geometry had no pinch i.e.the height of the dif-fuser was equal to the height of the impeller flow channel plus the axial running clearance.The work consists ofboth numerical and experimental parts.Quasi-steady, turbulent,fully 3D numerical simulations were conducted.The inlet cone,rotor and diffuser were modelled.Six different configurations were studied.The height of thepinch was altered and the pinch made to different walls was tested.Two of the numerically studied cases werealso experimentally investigated.The overall performance of the compressor,the circumferential static and totalpressure and the spanwise total pressure distribution before and after the diffuser were measured.The numericaland experimental studies showed that the pinch improved the efficiency of the compressor.
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| 关 键 词： | 压气机 技术性能 机械 压缩功能 |
| 收稿时间： | 20 June 2006 |
Computational and experimental study of pinch on the performance of a vaneless diffuser in a centrifugal compressor |
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| T.Turunen-Saaresti,A.Reunanen,J.Larjola.Computational and Experimental Study of Pinch on the Performance of a Vaneless Diffuser in a Centrifugal Compressor[J].Journal of Thermal Science,2006,15(4):306-313. |
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| Authors: | T Turunen-Saaresti A Reunanen J Larjola |
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| Affiliation: | (1) Department of Energy and Environmental Technology, Lappeenranta University of Technology, Lappeenranta, Finland |
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| Abstract: | This study focuses on the vaneless diffuser of a centrifugal compressor.The examined stage consists of an un- shrouded impeller,a parallel wall vaneless diffuser and a volute.The walls of the diffuser were movable allowing different pinch configurations to be investigated.The baseline geometry had no pinch i.e.the height of the dif- fuser was equal to the height of the impeller flow channel plus the axial running clearance.The work consists of both numerical and experimental parts.Quasi-steady, turbulent,fully 3D numerical simulations were conducted. The inlet cone,rotor and diffuser were modelled.Six different configurations were studied.The height of the pinch was altered and the pinch made to different walls was tested.Two of the numerically studied cases were also experimentally investigated.The overall performance of the compressor,the circumferential static and total pressure and the spanwise total pressure distribution before and after the diffuser were measured.The numerical and experimental studies showed that the pinch improved the efficiency of the compressor. |
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| Keywords: | Centrifugal compressor vaneless diffuser pinch |
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