The paper presents a numerical study where a hybrid CFD-Chemical Reactor Network (CRN) approach is used to predict pollutant emissions in a tubular combustor for aero-engine applications. A fully-automated clustering of the simulated flow field with the generation of a reactor network representative of the main flow features is exploited. Similar cells are detected and grouped using a two step approach, the first one based only on aerodynamic criteria for turbulent flows followed by a chemical refinement based on mixture fraction. A formulation for turbulent diffusion fluxes is introduced in the reactor code to model species and energy exchanges between reactors. Three different operating conditions are studied for which measured NOx and CO are available. Results highlight the importance of including turbulent diffusion in the network solution. The accurate prediction of pollutant emissions at different load points confirms that CFD-CRN is a valid and flexible approach for preliminary assessment of aero-engine combustor emissions in the design phase.

Turbulent flow-field effects in a hybrid CFD-CRN model for the prediction of NOxand CO emissions in aero-engine combustors / Innocenti, A.; Andreini, A.*; Bertini, D.; Facchini, B.; Motta, M.. - In: FUEL. - ISSN 0016-2361. - ELETTRONICO. - 215:(2018), pp. 853-864. [10.1016/j.fuel.2017.11.097]

Turbulent flow-field effects in a hybrid CFD-CRN model for the prediction of NOxand CO emissions in aero-engine combustors

Innocenti, A.
Software
;
Andreini, A.
Software
;
Bertini, D.
Validation
;
Facchini, B.
Funding Acquisition
;
Motta, M.
Funding Acquisition
2018

Abstract

The paper presents a numerical study where a hybrid CFD-Chemical Reactor Network (CRN) approach is used to predict pollutant emissions in a tubular combustor for aero-engine applications. A fully-automated clustering of the simulated flow field with the generation of a reactor network representative of the main flow features is exploited. Similar cells are detected and grouped using a two step approach, the first one based only on aerodynamic criteria for turbulent flows followed by a chemical refinement based on mixture fraction. A formulation for turbulent diffusion fluxes is introduced in the reactor code to model species and energy exchanges between reactors. Three different operating conditions are studied for which measured NOx and CO are available. Results highlight the importance of including turbulent diffusion in the network solution. The accurate prediction of pollutant emissions at different load points confirms that CFD-CRN is a valid and flexible approach for preliminary assessment of aero-engine combustor emissions in the design phase.
2018
215
853
864
Innocenti, A.; Andreini, A.*; Bertini, D.; Facchini, B.; Motta, M.
File in questo prodotto:
File Dimensione Formato  
JFUE12627.pdf

Accesso chiuso

Tipologia: Pdf editoriale (Version of record)
Licenza: Tutti i diritti riservati
Dimensione 6.15 MB
Formato Adobe PDF
6.15 MB Adobe PDF   Richiedi una copia
JFUE12627_Andreini_Open.pdf

accesso aperto

Tipologia: Versione finale referata (Postprint, Accepted manuscript)
Licenza: Creative commons
Dimensione 6.17 MB
Formato Adobe PDF
6.17 MB Adobe PDF

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1111353
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 39
  • ???jsp.display-item.citation.isi??? 27
social impact