On Mixed Flow Turbines for Automotive Turbocharger Applications
Due to increased demands for improved fuel economy of passenger cars, low-end and part-load performance is of key importance for the design of automotive turbocharger turbines. In an automotive drive cycle, a turbine which can extract more energy at high pressure ratios and lower rotational speeds i...
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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/10.1155/2012/589720 |
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| _version_ | 1832564602293977088 |
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| author | Bernhardt Lüddecke Dietmar Filsinger Jan Ehrhard |
| author_facet | Bernhardt Lüddecke Dietmar Filsinger Jan Ehrhard |
| author_sort | Bernhardt Lüddecke |
| collection | DOAJ |
| description | Due to increased demands for improved fuel economy of passenger cars, low-end and part-load performance is of key importance for the design of automotive turbocharger turbines. In an automotive drive cycle, a turbine which can extract more energy at high pressure ratios and lower rotational speeds is desirable. In the literature it is typically found that radial turbines provide peak efficiency at speed ratios of 0.7, but at high pressure ratios and low rotational speeds the blade speed ratio will be low and the rotor will experience high values of positive incidence at the inlet. Based on fundamental considerations, it is shown that mixed flow turbines offer substantial advantages for such applications. Moreover, to prove these considerations an experimental assessment of mixed flow turbine efficiency and optimal blade speed ratio is presented. This has been achieved using a new semi-unsteady measurement approach. Finally, evidence of the benefits of mixed flow turbine behaviour in engine operation is given. Regarding turbocharged engine simulation, the benefit of wide-ranging turbine map measurement data as well as the need for reasonable turbine map extrapolation is illustrated. |
| format | Article |
| id | doaj-art-3eff1c8cd6514b36b9ea8495b7ae1fb6 |
| 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-3eff1c8cd6514b36b9ea8495b7ae1fb62025-02-03T01:10:34ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342012-01-01201210.1155/2012/589720589720On Mixed Flow Turbines for Automotive Turbocharger ApplicationsBernhardt Lüddecke0Dietmar Filsinger1Jan Ehrhard2IHI Charging Systems International GmbH, Engineering Division, Haberstraße 24, D-69126 Heidelberg, GermanyIHI Charging Systems International GmbH, Engineering Division, Haberstraße 24, D-69126 Heidelberg, GermanyIHI Charging Systems International GmbH, Engineering Division, Haberstraße 24, D-69126 Heidelberg, GermanyDue to increased demands for improved fuel economy of passenger cars, low-end and part-load performance is of key importance for the design of automotive turbocharger turbines. In an automotive drive cycle, a turbine which can extract more energy at high pressure ratios and lower rotational speeds is desirable. In the literature it is typically found that radial turbines provide peak efficiency at speed ratios of 0.7, but at high pressure ratios and low rotational speeds the blade speed ratio will be low and the rotor will experience high values of positive incidence at the inlet. Based on fundamental considerations, it is shown that mixed flow turbines offer substantial advantages for such applications. Moreover, to prove these considerations an experimental assessment of mixed flow turbine efficiency and optimal blade speed ratio is presented. This has been achieved using a new semi-unsteady measurement approach. Finally, evidence of the benefits of mixed flow turbine behaviour in engine operation is given. Regarding turbocharged engine simulation, the benefit of wide-ranging turbine map measurement data as well as the need for reasonable turbine map extrapolation is illustrated.http://dx.doi.org/10.1155/2012/589720 |
| spellingShingle | Bernhardt Lüddecke Dietmar Filsinger Jan Ehrhard On Mixed Flow Turbines for Automotive Turbocharger Applications International Journal of Rotating Machinery |
| title | On Mixed Flow Turbines for Automotive Turbocharger Applications |
| title_full | On Mixed Flow Turbines for Automotive Turbocharger Applications |
| title_fullStr | On Mixed Flow Turbines for Automotive Turbocharger Applications |
| title_full_unstemmed | On Mixed Flow Turbines for Automotive Turbocharger Applications |
| title_short | On Mixed Flow Turbines for Automotive Turbocharger Applications |
| title_sort | on mixed flow turbines for automotive turbocharger applications |
| url | http://dx.doi.org/10.1155/2012/589720 |
| work_keys_str_mv | AT bernhardtluddecke onmixedflowturbinesforautomotiveturbochargerapplications AT dietmarfilsinger onmixedflowturbinesforautomotiveturbochargerapplications AT janehrhard onmixedflowturbinesforautomotiveturbochargerapplications |