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Large Eddy Simulation of Soot Formation in a Real Aero-Engine Combustor Using Tabulated Chemistry and a Quadrature-Based Method of Moments

Koob, Philipp ; Ferraro, Federica ; Nicolai, Hendrik ; Eggels, Ruud ; Staufer, Max ; Hasse, Christian (2024)
Large Eddy Simulation of Soot Formation in a Real Aero-Engine Combustor Using Tabulated Chemistry and a Quadrature-Based Method of Moments.
In: Journal of Engineering for Gas Turbines and Power, 2024, 146 (1)
doi: 10.26083/tuprints-00026528
Article, Secondary publication, Postprint

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Item Type: Article
Type of entry: Secondary publication
Title: Large Eddy Simulation of Soot Formation in a Real Aero-Engine Combustor Using Tabulated Chemistry and a Quadrature-Based Method of Moments
Language: English
Date: 15 January 2024
Place of Publication: Darmstadt
Year of primary publication: January 2024
Place of primary publication: New York, NY
Publisher: ASME
Journal or Publication Title: Journal of Engineering for Gas Turbines and Power
Volume of the journal: 146
Issue Number: 1
Collation: 11 Seiten
DOI: 10.26083/tuprints-00026528
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Abstract:

Considering the increasingly stringent targets for aircraft emissions, CFD is becoming a viable tool for improving future aero-engine combustors. However, predicting pollutant formation remains challenging. In particular, directly solving the evolution of soot particles is numerically expensive. To reduce the computational cost but retain detailed physical modeling, quadrature-based moments methods can be efficiently employed to approximate the particle number density function (NDF). An example is the recently developed split-based extended quadrature method of moments (S-EQMOM), which enables a continuous description of the soot particles’ NDF, essential to consider particle oxidation accurately. This model has shown promising results in laminar premixed flames up to turbulent laboratory scale configurations. However, the application to large-scale applications is still scarce. In this work, the S-EQMOM model is applied to the Rolls-Royce BR710 aero-engine combustor to investigate the soot evolution process in practically relevant configurations. For this, the soot model is embedded into a high-fidelity simulation framework, consisting of large eddy simulation for the turbulent flow and mixing and the flamelet generated manifold method for chemistry reduction. An additional transport equation for polycyclic aromatic hydrocarbons is solved to model their slow chemistry and the transition from the gaseous phase to the solid phase. Simulations are performed for different operating conditions (idle, approach, climb, take-off) to validate the model using experimental data. Subsequently, the results are analyzed to provide insights into the complex interactions of hydrodynamics, mixing, chemistry, and soot formation.

Uncontrolled Keywords: Aircraft engines, Combustion chambers, Simulation, Soot, Chemistry, Emissions, Large Eddy Simulation, Method of moments, S-EQMOM, Computational fluid dynamics (CFD)
Identification Number: 011015
Status: Postprint
URN: urn:nbn:de:tuda-tuprints-265286
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Rolls-Royce University Technology Center Combustor Turbine Interaction (UTC)
16 Department of Mechanical Engineering > Simulation of reactive Thermo-Fluid Systems (STFS)
TU-Projects: EC/H2020|821418|ESTiMatE
Date Deposited: 15 Jan 2024 13:13
Last Modified: 16 Jul 2024 09:36
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/26528
PPN: 514754621
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