kth.sePublikationer KTH
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Effect of nozzle spacing on flow behavior in a lean direct injection combustor
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemiteknik.ORCID-id: 0000-0002-7244-5178
Visa övriga samt affilieringar
2021 (Engelska)Ingår i: AIAA Scitech 2021 Forum, American Institute of Aeronautics and Astronautics (AIAA) , 2021, s. 1-13Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

A numerical study has been performed on a linear array of five nozzles in a lean direct injection (LDI) combustor for three mass flow rates and four different inter-nozzle spacings, using two equation realizable k − ɛ turbulence model. It is observed that the mass flow rates do not affect the flow patterns in this five nozzle configuration. The two smaller inter-nozzle spacings, s = 1.25d and 1.5d, developed asymmetric flow patterns. Especially at 1.5d, the asymmetry is quite dominant in the core flows of nozzles N2 and N4, due to the non-merging of jets in the shear layers. But, at higher nozzle spacings, s = 1.75d and 2d, the jets merge in the shear layers and move downstream as a single jet. Due to the slower expansion of the flow in the radial direction, strong and compact central toroidal recirculation zones (CTRZ) are formed at smaller inter-nozzle spacings, 1.25d and 1.5d. These compact CTRZs contribute to higher turbulence kinetic energy (TKE) in regions between the nozzles and closer to the dome-plate. These regions correspond to higher velocity and higher shear stress in the flow. As the inter-nozzle spacing is increased, the intensity of TKE decreases between the nozzles.

Ort, förlag, år, upplaga, sidor
American Institute of Aeronautics and Astronautics (AIAA) , 2021. s. 1-13
Nyckelord [en]
Combustion Chambers, Fuel-Air Ratio, Swirling Flow
Nationell ämneskategori
Strömningsmekanik
Identifikatorer
URN: urn:nbn:se:kth:diva-304939DOI: 10.2514/6.2021-0292Scopus ID: 2-s2.0-85100314595OAI: oai:DiVA.org:kth-304939DiVA, id: diva2:1611808
Konferens
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021, 11 January 2021 through 15 January 2021
Anmärkning

Part of proceedings: ISBN 978-1-62410-609-5, QC 20230117

Tillgänglig från: 2021-11-16 Skapad: 2021-11-16 Senast uppdaterad: 2025-02-09Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Person

Shen, Yazhou

Sök vidare i DiVA

Av författaren/redaktören
Ghulam, Mohamad M.Shen, Yazhou
Av organisationen
Kemiteknik
Strömningsmekanik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 74 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf