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Influence of Upstream Exhaust Manifold on Pulsatile Turbocharger Turbine Performance
KTH, Skolan för industriell teknik och management (ITM), Centra, Competence Center for Gas Exchange (CCGEx). KTH, Skolan för teknikvetenskap (SCI), Mekanik.ORCID-id: 0000-0002-6090-1498
KTH, Skolan för teknikvetenskap (SCI), Mekanik. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.ORCID-id: 0000-0002-2906-9306
KTH, Skolan för teknikvetenskap (SCI), Mekanik. KTH, Skolan för industriell teknik och management (ITM), Centra, Competence Center for Gas Exchange (CCGEx).ORCID-id: 0000-0001-7330-6965
2019 (Engelska)Ingår i: Journal of engineering for gas turbines and power, ISSN 0742-4795, E-ISSN 1528-8919, Vol. 141, nr 6Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This research was primary motivated by limited efforts to understand the effects of secondary flow and flow unsteadiness on the heat transfer and the performance of a turbocharger turbine subjected to pulsatile flow. In this study, we aimed to investigate the influence of exhaust manifold on the flow physics and the performance of its downstream components, including the effects on heat transfer, under engine-like pulsatile flow conditions. Based on the predicted results by detached eddy simulation (DES), qualitative and quantitative flow fields analyses in the scroll and the rotor's inlet were performed, in addition to the quantification of turbine performance by using the flow exergy methodology. With the specified geometry configuration and exhaust valve strategy, our study showed that (1) the exhaust manifold influences the flow field and the heat transfer in the scroll significantly and (2) although the exhaust gas blow-down disturbs the relative flow angle at rotor inlet, the consequence on the turbine power is relatively small.

Ort, förlag, år, upplaga, sidor
2019. Vol. 141, nr 6
Nyckelord [en]
turbocharger turbine, engine-like pulsatile flow, heat transfer, exergy, DES
Nationell ämneskategori
Maskinteknik Strömningsmekanik och akustik Farkostteknik
Forskningsämne
Teknisk mekanik
Identifikatorer
URN: urn:nbn:se:kth:diva-244665DOI: 10.1115/1.4042301ISI: 000468915800011Scopus ID: 2-s2.0-85061841259OAI: oai:DiVA.org:kth-244665DiVA, id: diva2:1291212
Konferens
141(6), 061010
Forskningsfinansiär
Energimyndigheten, 33834-3
Anmärkning

QC 20190226

Tillgänglig från: 2019-02-22 Skapad: 2019-02-22 Senast uppdaterad: 2019-10-24Bibliografiskt granskad

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Lim, Shyang MawDahlkild, AndersMihaescu, Mihai

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Lim, Shyang MawDahlkild, AndersMihaescu, Mihai
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Competence Center for Gas Exchange (CCGEx)MekanikLinné Flow Center, FLOW
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Journal of engineering for gas turbines and power
MaskinteknikStrömningsmekanik och akustikFarkostteknik

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