Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal Compressor
This paper presents a numerical investigation of the effects of a nonuniform tip clearance profile on the performance and flow field in a centrifugal compressor with a vaneless diffuser. This study focuses in particular on the magnitude and location of the wake. Six impellers with different tip clea...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2012/340439 |
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| _version_ | 1832554561800241152 |
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| author | Yohan Jung Minsuk Choi Seonghwan Oh Jehyun Baek |
| author_facet | Yohan Jung Minsuk Choi Seonghwan Oh Jehyun Baek |
| author_sort | Yohan Jung |
| collection | DOAJ |
| description | This paper presents a numerical investigation of the effects of a nonuniform tip clearance profile on the performance and flow field in a centrifugal compressor with a vaneless diffuser. This study focuses in particular on the magnitude and location of the wake. Six impellers with different tip clearance profiles were tested in the flow simulations. The accuracy of the numerical simulations was assessed by comparing the experimental data with the computational results for a system characterized by the original tip clearance. Although the performance improved for low tip clearances, a low tip clearance at the trailing edge improved the compressor performance more significantly than a low tip clearance at the leading edge. The flow field calculated for a system characterized by a low tip clearance at the trailing edge produced a more uniform velocity distribution both in the circumferential and in the axial directions at the impeller exit because the wake magnitude was reduced. As a consequence, this impeller provided a better potential for diffusion processes inside a vaneless diffuser. |
| format | Article |
| id | doaj-art-45f240194379466fa4386f0d1e3284d5 |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-45f240194379466fa4386f0d1e3284d52025-02-03T05:51:05ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342012-01-01201210.1155/2012/340439340439Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal CompressorYohan Jung0Minsuk Choi1Seonghwan Oh2Jehyun Baek3Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Republic of KoreaDepartment of Mechanical Engineering, Myongji University, Yongin 449-728, Republic of KoreaThe 7th R&D Institute, Agency for Defense Development, Daejeon 305-152, Republic of KoreaDepartment of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang 790-784, Republic of KoreaThis paper presents a numerical investigation of the effects of a nonuniform tip clearance profile on the performance and flow field in a centrifugal compressor with a vaneless diffuser. This study focuses in particular on the magnitude and location of the wake. Six impellers with different tip clearance profiles were tested in the flow simulations. The accuracy of the numerical simulations was assessed by comparing the experimental data with the computational results for a system characterized by the original tip clearance. Although the performance improved for low tip clearances, a low tip clearance at the trailing edge improved the compressor performance more significantly than a low tip clearance at the leading edge. The flow field calculated for a system characterized by a low tip clearance at the trailing edge produced a more uniform velocity distribution both in the circumferential and in the axial directions at the impeller exit because the wake magnitude was reduced. As a consequence, this impeller provided a better potential for diffusion processes inside a vaneless diffuser.http://dx.doi.org/10.1155/2012/340439 |
| spellingShingle | Yohan Jung Minsuk Choi Seonghwan Oh Jehyun Baek Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal Compressor International Journal of Rotating Machinery |
| title | Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal Compressor |
| title_full | Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal Compressor |
| title_fullStr | Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal Compressor |
| title_full_unstemmed | Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal Compressor |
| title_short | Effects of a Nonuniform Tip Clearance Profile on the Performance and Flow Field in a Centrifugal Compressor |
| title_sort | effects of a nonuniform tip clearance profile on the performance and flow field in a centrifugal compressor |
| url | http://dx.doi.org/10.1155/2012/340439 |
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