Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems
High-pressure ratio centrifugal compressors require advanced diffusion systems to achieve enhanced efficiencies set by future turbocharger applications. To address the shortcomings of the commonly used channel diffuser and airfoil cascade design perspectives, a streamtube based area schedule is adop...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
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ASME International
2018
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| Online Access: | http://hdl.handle.net/1721.1/116397 https://orcid.org/0000-0002-6180-3574 https://orcid.org/0000-0003-2167-9860 |
| _version_ | 1826195898912210944 |
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| author | Rusch, Daniel Hunziker, René Gao, Ruhou Spakovszky, Zoltan S |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Rusch, Daniel Hunziker, René Gao, Ruhou Spakovszky, Zoltan S |
| author_sort | Rusch, Daniel |
| collection | MIT |
| description | High-pressure ratio centrifugal compressors require advanced diffusion systems to achieve enhanced efficiencies set by future turbocharger applications. To address the shortcomings of the commonly used channel diffuser and airfoil cascade design perspectives, a streamtube based area schedule is adopted paying special attention to the diffuser entry region. It is shown that the diffusion in the semivaneless space, controlled chiefly by inlet flow angle and the vane suction side geometry, plays a key role in improving diffuser performance. Removing excess thickness from the suction side eliminates flow overspeed, increases effective diffusion length, and leads to higher pressure recovery at reduced stagnation pressure loss. The pressure side thickness distribution controls the channel area schedule. Thin leading edges (LEs) ensure smooth flow area transition into the channel and reduce the vane upstream influence, mitigating high-cycle fatigue related mechanical issues. |
| first_indexed | 2024-09-23T10:17:11Z |
| format | Article |
| id | mit-1721.1/116397 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:17:11Z |
| publishDate | 2018 |
| publisher | ASME International |
| record_format | dspace |
| spelling | mit-1721.1/1163972022-09-26T17:01:45Z Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems Rusch, Daniel Hunziker, René Gao, Ruhou Spakovszky, Zoltan S Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Gao, Ruhou Spakovszky, Zoltan S High-pressure ratio centrifugal compressors require advanced diffusion systems to achieve enhanced efficiencies set by future turbocharger applications. To address the shortcomings of the commonly used channel diffuser and airfoil cascade design perspectives, a streamtube based area schedule is adopted paying special attention to the diffuser entry region. It is shown that the diffusion in the semivaneless space, controlled chiefly by inlet flow angle and the vane suction side geometry, plays a key role in improving diffuser performance. Removing excess thickness from the suction side eliminates flow overspeed, increases effective diffusion length, and leads to higher pressure recovery at reduced stagnation pressure loss. The pressure side thickness distribution controls the channel area schedule. Thin leading edges (LEs) ensure smooth flow area transition into the channel and reduce the vane upstream influence, mitigating high-cycle fatigue related mechanical issues. ABB Turbo Systems AG 2018-06-19T13:22:52Z 2018-06-19T13:22:52Z 2017-01 2018-04-11T13:35:36Z Article http://purl.org/eprint/type/JournalArticle 0889-504X http://hdl.handle.net/1721.1/116397 Gao, Ruhou, et al. “Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems.” Journal of Turbomachinery, vol. 139, no. 1, Sept. 2016, p. 011012. © 2017 by ASME https://orcid.org/0000-0002-6180-3574 https://orcid.org/0000-0003-2167-9860 http://dx.doi.org/10.1115/1.4034488 Journal of Turbomachinery Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf ASME International ASME |
| spellingShingle | Rusch, Daniel Hunziker, René Gao, Ruhou Spakovszky, Zoltan S Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems |
| title | Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems |
| title_full | Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems |
| title_fullStr | Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems |
| title_full_unstemmed | Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems |
| title_short | Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems |
| title_sort | area schedule based design of high pressure recovery radial diffusion systems |
| url | http://hdl.handle.net/1721.1/116397 https://orcid.org/0000-0002-6180-3574 https://orcid.org/0000-0003-2167-9860 |
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