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Sökning: id:"swepub:oai:research.chalmers.se:87e6089c-f39d-48c0-aa5a-c7d837f87ef7" > Computational chara...

  • Babayev, RafigKing Abdullah University of Science and Technology (KAUST) (författare)

Computational characterization of hydrogen direct injection and nonpremixed combustion in a compression-ignition engine

  • Artikel/kapitelEngelska2021

Förlag, utgivningsår, omfång ...

  • Elsevier BV,2021

Nummerbeteckningar

  • LIBRIS-ID:oai:research.chalmers.se:87e6089c-f39d-48c0-aa5a-c7d837f87ef7
  • https://doi.org/10.1016/j.ijhydene.2021.02.223DOI
  • https://research.chalmers.se/publication/523210URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:art swepub-publicationtype
  • Ämneskategori:ref swepub-contenttype

Anmärkningar

  • With the revived interest in hydrogen (H ) as a direct combustion fuel for engine applications, a computational study is conducted to assess the characteristics of H direct-injection (DI) compression-ignition (CI) non-premixed combustion concept. Development of a CFD modeling using CONVERGE CFD solver focuses on hydrogen's unique characteristics by utilizing a suitable numerical method to reproduce the direct H injection phenomena. A grid sensitivity study is performed to ensure the fidelity of results with optimal cost, and the models are validated against constant-volume optical chamber and diesel engine experimental data. The present study aims to contribute to the future development of DICI H combustion engines, providing detailed characterization of the combustion cycle, and highlighting several distinct aspects of CI nonpremixed H versus diesel combustion. First, unlike the common description of diesel sprays, hydrogen jets do not exhibit significant flame lift-off and air entrainment near injector nozzle, and the fuel-air interface is drastically more stratified with no sign of premixing. It is also found that the DICI H combustion concept is governed first by a free turbulent jet mixing phase, then by an in-cylinder global mixing phase. The former is drastically more dominant with the DICI H engine compared to conventional diesel engines. The free-jet mixing is also found to be more effective that the global mixing, which indicates the need to completely rethink the optimization strategies for CI engines when using H as fuel. 2 2 2 2 2 2 2 2

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Andersson, ArneVolvo Cars (författare)
  • Dalmau, Albert SerraVolvo Cars (författare)
  • Im, Hong G.King Abdullah University of Science and Technology (KAUST) (författare)
  • Johansson, Bengt,1963Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)bengtj (författare)
  • King Abdullah University of Science and Technology (KAUST)Volvo Cars (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:International Journal of Hydrogen Energy: Elsevier BV46:35, s. 18678-186960360-3199

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