Forschung:

• Analyse von Emissionsbildung in DNS vorgemischter, turbulenter Flammen
  • Modellierung von Stickoxidbildung in turbulenten Flammen
  • Modellierung von Ruß-Turbulenz-Interaktionen 

• DNS von Wasserstoffverbrennung & Modellentwicklung für LES
• Sphärische vorgemischte laminare Flammen unter Gravitationseinfluss
• Methodenentwicklung zur Analyse von DNS
  • Deep Learning & Artificial Neural Networks

Lehre:

• Technische Verbrennung I

• P. Farmand, H. Nicolai, C. Schumann, A. Attili, L. Berger, T. Li, C. Geschwindner, F. di Mare, C. Hasse, B. Böhm, J. Janicka and H. Pitsch. Numerical investigation and assessment of flamelet-based models for the prediction of pulverized solid fuel homogeneous ignition and combustion. Combustion and Flame, vol. 235, page 111693, January 2022. [DOI]
• M. Hegetschweiler, J. Pagliaro, L. Berger, R. Hesse, J. Beeckmann, C. Bariki, H. Pitsch and G. Linteris. Data reduction considerations for spherical R-32(CH2F2)-air flame experiments. Combustion and Flame, vol. 237, page 111806, 2022. [DOI]
• L. Berger, A. Attili, J. Wang, K. Maedac and H. Pitsch. Thermodiffusive Instabilities in Turbulent Hydrogen Flames: Development of LES Combustion Models. Center for Turbulence Research, 2022.
• Lukas Berger, Antonio Attili and Heinz Pitsch. Intrinsic instabilities in premixed hydrogen flames: Parametric variation of pressure, equivalence ratio, and temperature. Part 1-Dispersion relations in the linear regime. COMBUSTION AND FLAME, vol. 240, June 2022. [DOI]
• Lukas Berger, Antonio Attili and Heinz Pitsch. Intrinsic instabilities in premixed hydrogen flames: parametric variation of pressure, equivalence ratio, and temperature. Part 2-Non-linear regime and flame speed enhancement. COMBUSTION AND FLAME, vol. 240, June 2022. [DOI]
• H. Chu, M. Davidovic, L. Berger and H. Pitsch. A Comparison of Early Flame Kernel Development in Hydrogen/Air and iso-Octane/Air Mixtures under Engine Conditions. 18th International Conference on Numerical Combustion, 8-11 May 2022, San Diego, USA, 2022.
• K. Niemietz, L. Berger, M. Huth, A. Attili and H. Pitsch. Direct numerical simulation of flame-wall interaction at gas turbine relevant conditions. Proceedings of The Combustion Institute, 2022. [DOI]
• H. Chu, L. Berger, T. Grenga, Z. Wu and H. Pitsch. Effects of differential diffusion on hydrogen flame kernel development under engine conditions.. Proceedings of The Combustion Institute, 2022.
• L. Berger, A. Wick, A. Attili, M. Mueller and H. Pitsch. Modeling subfilter soot-turbulence interactions in Large Eddy Simulation: An a priori study. Proceedings of the Combustion Institute, vol. 38, pages 2783-2790, 2021. [DOI]
• A. Attili, R. Lamioni, L. Berger, K. Kleinheinz, H. Pitsch and F. Creta. The effect of pressure on the hydrodynamic stability limit of premixed flames. Proceedings of the Combustion Institute, vol. 38, pages 1973-1981, 2021.
• R. Hesse, L. Berger, C. Bariki, M.J. Hegetschweiler, G.T. Linteris, H. Pitsch and J. Beeckmann. Low global-warming-potential refrigerant CH2F2 (R-32): Integration of a radiation heat loss correction method to accurately determine experimental flame speed metrics. Proceedings of the Combustion Institute, vol. 38, pages 4665-4672, 2021. [DOI]
• L. Berger, A. Attili and H. Pitsch. Challenges in Hydrogen Combustion: Intrinsic Instabilities in Laminar & Turbulent Flames. In 743. WE-Heraeus-Seminar: Process Integration, Chemical and Thermal Energy Storage for the Energy Transformation, March 22-24, Bad Honnef (Germany) / Online, 2021.
• L. Berger, A. Attili and H. Pitsch. Intrinsic Instabilities in Turbulent Premixed Hydrogen Flames: A DNS Study. In 74th Annual Meeting of the Division of Fluid Dynamics, November 21-23, Phoenix, AZ, USA, 2021.
• G. Scialabba, R. Langer, A. Attili, L. Berger and H. Pitsch. The relevance of soot diffusion in counterflow laminar flame configurations. In Proceedings of the 10th European Combustion Meeting, April 14-15, Naples (Italy) / Online, 2021.
• L. Berger, A. Attili and H. Pitsch. Interactions of Turbulence and Thermodiffusive Instabilities in remixed Lean Hydrogen Flames. In Proceedings of the 10th European Combustion Meeting, April 14-15, Naples (Italy) / Online, 2021.
• M. Hegetschweiler, J. Pagliaro, L. Berger, R. Hesse, J. Beeckmann, H. Pitsch and G. Linteris. Effects of stretch and radiation on the laminar burning velocity of R-32/air flames. Science and Technology for the Built Environment, pages 1-11, 2020. [DOI]
• L. Berger, R. Hesse, K. Kleinheinz, M. Hegetschweiler, A. Attili, J. Beeckmann, G. Linteris and H. Pitsch. A DNS study of the impact of gravity on spherically expanding laminar premixed flames. Combustion and Flame, vol. 216, pages 412-425, 2020. [DOI]
• L. Berger, A. Attili and H. Pitsch. Interactions of turbulence and thermodiffusive instabilities in premixed lean hydrogen flames. In Annual Conference of the American Physical Society, Division of Fluid Dynamics, November 22-24, Chicago (USA), 2020.
• R. Lamioni, P. Lapenna, L. Berger, K. Kleinheinz, A. Attili, H. Pitsch and F. Creta. Pressure-induced Hydrodynamic Instability in Premixed Methane-Air Slot Flames. Combustion Science and Technology, 2020. [DOI]
• K. Kleinheinz, P. Maß, L. Berger, M. Bode, T. Grenga, A. Attili and H. Pitsch. Data-driven Model Development for CO emissions in Stationary Gas Turbines. In Proceedings of the European Combustion Meeting, April 15th-17th, Lisbon, Portugal, 2019.
• A. Attili, K. Kleinheinz, D. Denker, L. Berger, F. Bisetti and H. Pitsch. Mixing and entrainment of burned products in high Karlovitz number premixed jet flames. In Proceedings of the European Combustion Meeting, April 15th-17th, Lisbon, Portugal, 2019.
• Lukas Berger, Konstantin Kleinheinz, Antonio Attili and Heinz Pitsch. Characteristic patterns of thermodiffusively unstable premixed lean hydrogen flames. Proceedings of the Combustion Institute, vol. 37 no. 2, pages 1879-1886, 2019. [DOI]
• L. Berger, K. Kleinheinz, A. Attili and H. Pitsch. Interaction of thermodiffusive and Darrieus-Landau instabilities in lean premixed hydrogen flames. In Seventeenth International Conference on Numerical Combustion, May 6th-8th, Aachen, Germany, 2019.
• L. Berger, R. Hesse, K. Kleinheinz, A. Attili, J. Beeckmann and H. Pitsch. A DNS study of the impact of gravity on spherically expanding premixed flames. In Proceedings of the European Combustion Meeting, April 15th-17th, Lisbon, Portugal, 2019.
• A. Attili, H. Pitsch, L. Berger, K. Kleinheinz, D. Denker, S. Luca, F. Bisetti, F. Creta and E. Lo Schiavo. High Reynolds number premixed jet flames at elevated pressure. In Workshop on Fundamental Understanding and Modelling of High Pressure Turbulent Premixed Combustion (HPTC), September 19th-20th, Munich, Germany, 2019.
• R. Lamioni, L. Berger, K. Kleinheinz, A. Attili, P.E. Lapenna, H. Pitsch and F. Creta. Pressure Induced Hydrodynamic Instability in Premixed Methane Air Flames. In Proceedings of the 11th Mediterranean Combustion Symposium, June 16th-20th, Tenerife, Spain, 2019.
• R. Lamioni, P.E. Lapenna, L. Berger, K. Kleinheinz, A. Attili, H. Pitsch and F. Creta. Pressure induced hydrodynamic instability in methane-air premixed flames. In Seventeenth International Conference on Numerical Combustion, May 6th-8th, Aachen, Germany, 2019.
• K. Kleinheinz, L. Berger, M. Bode, A. Attili and H. Pitsch. LES model for CO emissions in stationary gas turbines at part load conditions. In Seventeenth International Conference on Numerical Combustion, May 6th-8th, Aachen, Germany, 2019.
• M.E. Mueller, B.A. Perry, A.C. Nunno, J.F. MacArt and L. Berger. Integrating Data-Based Tools into Physics-Based Model Development for Turbulent Combustion. In Seventeenth International Conference on Numerical Combustion, May 6th-8th, Aachen, Germany, 2019.
• L. Berger, K. Kleinheinz, A. Attili and H. Pitsch. Non-Linear Evolution of Thermodiffusively Unstable Lean Premixed Hydrogen Flames. In Joint Meeting of the German and Italian Sections of the Combustion Institute, May 23 - 26, Sorrento, Italy, 2018.
• L. Berger, K. Kleinheinz, A. Attili, F. Bisetti, H. Pitsch and M. E. Mueller. Numerically accurate computational techniques for optimal estimator analyses of multi-parameter models. Combustion Theory and Modelling, vol. 22 no. 3, pages 480-504, 2018. [DOI]
• A. Wick, K. Kleinheinz, L. Berger and H. Pitsch. Modeling of emissions in gasturbines. In FVV 2018 Autumn Conference, September 27 - 28, Würzburg, Germany, 2018.
• K. Kleinheinz, L. Berger, A. Attili and H. Pitsch. Direct Numerical Simulation of a lean, premixed, staged combustor with a focus on CO emission. In Joint Meeting of the German and Italian Sections of the Combustion Institute, May 23 - 26, Sorrento, Italy, 2018.
• K. Kleinheinz, L. Berger, A. Attili and H. Pitsch. CO emissions in staged gas turbine combustor - a DNS study. In 37th International Symposium on Combustion, July/August 2018, Dublin, Ireland, 2018.
• L. Berger, K. Kleinheinz, A. Attili, M. E. Mueller and H. Pitsch. Adequate Techniques for the Practical Computation of Optimal Estimators. In 16th SIAM International Conference on Numerical Combustion, April 3rd-5th, Orlando, Florida, USA, 2017.
• L. Berger, A. Wick, A. Attili, M. E. Mueller and H. Pitsch. Analysis of Soot-Turbulence Interactions for Sub-Filter Modeling in LES. In Proceedings of the European Combustion Meeting, April 18th-21st, Dubrovnik, Croatia, 2017.
• K. Kleinheinz, L. Berger, A. Attili, H. Wang, E.R. Hawkes and H Pitsch. A Priori and a Posteriori Study of a High Karlovitz Number Premixed Turbulent Jet Configuration. In 16th SIAM International Conference on Numerical Combustion, April 3rd-5th, Orlando, Florida, USA, 2017.
• A. Wick, K. Kleinheinz, L. Berger and H. Pitsch. Modeling of emissions in gasturbines. In FVV Autumn Conference 2016, September 29th - 30th, Magdeburg, Germany, 2016.
• Stephan Kruse, Bruno Kerschgens, Lukas Berger, Emilien Varea and Heinz Pitsch. Experimental and numerical study of MILD combustion for gas turbine applications. Applied Energy, vol. 148, pages 456 - 465, 2015.