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Energies
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Computational Fluid Dynamics for Turbulent Combustion
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Computational Fluid Dynamics for Turbulent Combustion

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J: Thermal Management".

Deadline for manuscript submissions: closed (20 December 2020) | Viewed by 7102

Special Issue Editors

Prof. Dr. Giuseppe Pascazio

E-Mail Website
Guest Editor
Dipartimento di Meccanica, Matematica e Management & Centro di Eccellenza in Meccanica Computazionale, Politecnico di Bari, 70125 Bari, Italy
Interests: computational fluid dynamics; aerodynamics; reacting flows and combustion modeling; fluid-structure interation problems; microfluidics
Dr. Francesco Bonelli

E-Mail Website
Guest Editor
Dipartimento di Meccanica, Matematica e Management, DMMM, Politecnico di Bari, 70125 Bari, Italy
Interests: thermochemical non-equilibrium; turbulent flows; hypersonic flows; active matter
Dr. Mario Di Renzo

E-Mail Website
Guest Editor
Center for Turbulence Research, Stanford University, Stanford, CA 94305-3024, USA
Interests: combustion theory; electrified combustion; particle-laden flows; hypersonic flows

Special Issue Information

Dear Colleagues,

Modeling the interaction of turbulence with chemical reactions is one of the classic problems of computational fluid dynamics. The main driver for the investigation of this subject is the development of more efficient and cleaner combustion technologies. The major difficulties in this effort are posed by the strong coupling that develops between turbulence and combustion and that may lead to augmentation or the extinction of the combustion processes and the modification of the turbulent flow properties because of gas expansion, temperature increase, buoyancy, etc. The prohibitive computational cost of direct calculations often forestalls the numerical investigation of the reacting flows even in very simplified configurations. At the same time, the multiscale nature of the involved phenomena and the large range of regimes encountered in laboratory flames and industrial burners increases the complexity of devising models that require minimal prior knowledge of the flow that needs to be investigated.

The present Special Issue aims to collect research and review articles addressing multiple aspects of modeling turbulent combustion. Manuscripts about fundamental physics, applied numerical methods, as well as industrial-scale applications will be considered for publication.

Prof. Dr. Giuseppe Pascazio
Dr. Francesco Bonelli
Dr. Mario Di Renzo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Turbulent combustion fundamentals
  • Numerical methods for turbulent combustion
  • Premixed combustion
  • Non-premixed combustion
  • Supersonic combustion
  • Finite rate chemistry
  • Direct numerical simulation
  • Large eddy simulation
  • Reynolds averaged Navier–Stokes modeling
  • Pdf transport equation model
  • Flamelet models
  • Conditional moment closure
  • Linear eddy model
  • Gas turbines
  • Burners
  • Internal combustion engines

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Published Papers (2 papers)

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Research

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23 pages, 7457 KiB  
Article
On the Turbulence-Chemistry Interaction of an HCCI Combustion Engine
by Marco D’Amato, Annarita Viggiano and Vinicio Magi
Energies 2020, 13(22), 5876; https://doi.org/10.3390/en13225876 - 11 Nov 2020
Cited by 10 | Viewed by 2867
Abstract
A numerical study was carried out to evaluate the influence of engine combustion chamber geometry and operating conditions on the performance and emissions of a homogeneous charge compression ignition (HCCI) engine. Combustion in an HCCI engine is a very complex phenomenon that is [...] Read more.
A numerical study was carried out to evaluate the influence of engine combustion chamber geometry and operating conditions on the performance and emissions of a homogeneous charge compression ignition (HCCI) engine. Combustion in an HCCI engine is a very complex phenomenon that is influenced by several factors that need to be controlled, such as gas temperature, heat transfer, turbulence and auto-ignition of the gas mixture. An eddy dissipation concept (EDC) combustion model was used to take into account the interaction between turbulence and chemistry. The model assumed that reactions occur in small turbulent structures called fine-scales, whose characteristic lengths and times depend mainly on the turbulence level. The model parameters were slightly modified with respect to the standard model proposed by Magnussen, to correctly simulate the characteristics of the HCCI combustion process. A reduced iso-octane chemical mechanism with 186 species and 914 chemical reactions was employed together with a sub-mechanism for NOx. The model was validated by comparing the results with available experimental data in terms of pressure and instantaneous heat release rate. Two engine chamber geometries with and without a cavity in the piston were considered, respectively. The two engines provided significant differences in terms of fluid-dynamic patterns and turbulence intensity levels in the combustion chamber. The results show that combustion started earlier and proceeded faster for the flat piston, leading to an increase in both the peak pressure and gross indicated mean effective pressure, as well as a reduction of CO and UHC emissions. An additional analysis was performed by considering a case without swirl for the flat-piston case. Such an analysis shows that the swirl motion reduces the time duration of combustion and slightly increases the gross indicated work per cycle. Full article
(This article belongs to the Special Issue Computational Fluid Dynamics for Turbulent Combustion)
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Review

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26 pages, 3520 KiB  
Review
Towards a Predictive Simulation of Turbulent Combustion?—An Assessment for Large Internal Combustion Engines
by Thomas Lauer and Jens Frühhaber
Energies 2021, 14(1), 43; https://doi.org/10.3390/en14010043 - 23 Dec 2020
Cited by 5 | Viewed by 3328
Abstract
Frequently the question arises in what sense numerical simulation can be considered predictive if prior model tuning with test results is necessary. In this paper a summary of the present Computational Fluid Dynamics (CFD) simulation methods for in-cylinder modelling is presented with a [...] Read more.
Frequently the question arises in what sense numerical simulation can be considered predictive if prior model tuning with test results is necessary. In this paper a summary of the present Computational Fluid Dynamics (CFD) simulation methods for in-cylinder modelling is presented with a focus on combustion processes relevant for large engines. The current discussion about the sustainability of internal combustion engines will have a strong impact on applying advanced CFD methods in industrial processes. It is therefore included in the assessment. Simplifications and assumptions of turbulence, spray, and combustion models, as well as uncertainties of model boundary conditions, are discussed and the future potential of an advanced approach like Large Eddy Simulation (LES) is evaluated. It follows that a high amount of expertise and a careful evaluation of the numerical results will remain necessary in the future to apply the best-suited models for a given combustion process. New chemical mechanisms will have to be developed in order to represent prospective fuels like hydrogen or OME. Multi-injection or dual fuel combustion will further pose high requirements to the numerical methods. Therefore, the further development and validation of advanced mixture, combustion and emission models will remain important. Close cooperation between academia, code suppliers and engine manufacturers could promote the necessary progress. Full article
(This article belongs to the Special Issue Computational Fluid Dynamics for Turbulent Combustion)
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