Forschung:

• Experimentelle Bestimmung fundamentaler Verbrennungsparameter der vorgemischten Verbrennung, z.B. die laminare Brenngeschwindigkeit
  Anwendung: Sicherheitsaspekte Brandschutz, motorische Verbrennung, Gasturbinen
• Optische Messtechniken (Schlieren, LIF, PIV)

Lehre: -

• R. Glaznev, F. Halter, C. Schwenzer, R. Hesse, C. Bariki, C. Chauveau, H. Pitsch and J. Beeckmann. Experimental Laminar Flame Speed Study of Nitrogen-diluted Diethoxymethane/Oxidizer Mixtures under Microgavity. In 11th European Combustion Meeting, 2023.
• Raik Hesse, Chaimae Bariki, Michael J. Hegetschweiler, Gregory T. Linteris, Heinz Pitsch and Joachim Beeckmann. Elucidating the challenges in extracting ultra-slow flame speeds in a closed vessel-A CH2F2 microgravity case study using optical and pressure-rise data. Proceedings of the Combustion Institute, vol. 39 no. 2, pages 1783-1792, 2023. [DOI]
• Chaimae Bariki, Fabien Halter, Raik Hesse, Christian Chauveau, Heinz Pitsch and Joachim Beeckmann. Experimental measurements of laminar flame speeds for highly N 2-diluted ethanol flames under microgravity conditions. Proceedings of the Combustion Institute, vol. 39 no. 3, pages 3929-3938, 2023. [DOI]
• M. J. Hegetschweiler, L. Berger, R. Hesse, J. Beeckmann, C. Bariki, H. Pitsch and G. T. Linteris. Data reduction considerations for the burning velocity of spherical constant volume flames of R32 (CH2F2) with air. Combustion and Flame, vol. 254, page 112807, 2023. [DOI]
• C. Schwenzer, R. Hesse, R. Glaznev, V. I. Babushok, G. T. Linteris, H. Pitsch and J. Beeckmann. Simultaneous Particle Image Velocimetry and Schlieren Measurements of Slow-burning Flames. Proceedings of the 11th European Combustion Meeting, 2023.
• R. Hesse, R. Glaznev, C. Schwenzer, V. I. Babushok, G. T. Linteris, H. Pitsch and J. Beeckman. A Microgravity Flame Speed Study on Refrigerant Mixtures of 2,3,3,3-Tetrafluoropropene (R1234yf) and Difluoromethane (R32). Proceedings of the 11th European Combustion Meeting, 2023.
• R. Glaznev, R. Hesse, C. Schwenzer, S. Girhe, T. Lehmann, S. Eckart, H. Pitsch and J. Beeckmann. Analysis of Radiation and Buoyancy Induced Uncertainty of Ammonia Flames. Proceedings of the 11th European Combustion Meeting, 2023.
• 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]
• R. Hesse, C. Schwenzer, R. Glaznev, S. Esposito and H. Pitsch. Experimental-Based Laminar Flame Speed Approximation Formulas of Efficiency-Optimized Biofuels for SI-Engine Modeling. SAE Technical Paper, pages 24-32, 2022. [DOI]
• S. Esposito, A. Chaychizadeh, D. Golc, R. Hesse, J. Beeckmann and H. Pitsch. 3D-CFD RANS Methodology to Predict Engine-Out Emissions with Gasoline-Like Fuel and Methanol for a DISI Engine. SAE Technical Paper, 2022.
• S. Jacobs, M. Döntgen, A. Alquaity, R. Hesse, S. Kruse, J. Beeckmann, L. Kröger, P. Morsch, K. Leonhard, H. Pitsch and K. A. Heufer. A Comprehensive Experimental and Kinetic Modeling Study of the Combustion Chemistry of Diethoxymethane. Energy & Fuels, vol. 35 no. 19, pages 16086-16100, 09 2021. [DOI]
• C. Bariki, R. Hesse, F. Halter, H. Pitsch and J. Beeckmann. Combined isochoric and isobaric acquisition methodology for accurate flame speed measurements from ambient to high pressures and temperatures. Proceedings of the Combustion Institute, vol. 38, pages 2185-2193, 2021. [DOI]
• 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]
• 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]
• A.Y. Deshmukh, M. Modarres, R. Karuvingal, M. Khosravi, M. D‘Elia, R. Hesse, J. Beeckmann, L. Cai and H. Pitsch. Modeling of Combustion in DI-CNG Engines. In Converge EU User Conference, March 31st–April 1st, Online, 2020.
• J. Beeckmann, R. Hesse, J. Schaback, H. Pitsch, E. Varea and N. Chaumeix. Flame propagation speed and Markstein length of spherically expanding flames: Assessment of extrapolation and measurement techniques. Proceedings of the Combustion Institute, vol. 37 no. 2, pages 1521-1528, 2019. [DOI]
• R. Hesse, J. Beeckmann and H. Pitsch. An Updated Chemical Kinetic Model for the Simulation of Laminar Burning Velocities of Premixed Hydrogen-, Methane-, and n-Heptane/Air Flames. In Proceedings of the 9th European Combustion Meeting, April 14-17, Lisbon, Portugal, 2019.
• L. Cai, H. Minwegen, S. Kruse, R. D. Büttgen, R. Hesse, A. Ramalingam, J. Beeckmann, K. Leonhard, K. A. Heufer and H. Pitsch. Exploring the combustion chemistry of a novel lignocellulose-derived biofuel: cyclopentanol. Part II: experiment, model validation, and functional group analysis. Combustion and Flame, vol. 210, pages 134-144, 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.
• Nitin Lokachari, Ultan Burke, Ajoy Ramalingam, Mattias Turner, Raik Hesse, Kieran Somers, Joachim Beeckmann, Alexander Heufer, Eric Petersen and H.J. Curran. New experimental insights into acetylene oxidation through novel ignition delay times, laminar burning velocities and chemical kinetic modelling. Proceedings of the Combustion Institute, vol. 37, pages 583-591, 08 2019. [DOI]
• R. Hesse, J. Beeckmann, K. Wantz and H. Pitsch. Laminar Burning Velocity of Market Type Gasoline Surrogates as a Performance Indicator in Internal Combustion Engines. SAE Technical Paper, vol. 2018-01-1667, 2018. [DOI]
• Nitin Lokachari, Ultan Burke, Ajoy Kumar Ramalingam, Mattias Turner, Raik Hesse, Kieran P. Somers, Joachim Lutz Beeckmann, Karl Alexander Heufer, Eric L. Petersen and Henry J. Curran. New experimental insights into acetylene oxidation through novel ignition delay times, laminar burning velocities and chemical kinetic modelling. In Proceedings of the Combustion Institute, 2018. [DOI]
• W.A. Kopp, L.C. Kröger, L. Cai, R. Hesse, S. Kruse, A.B.S. Alquaity, J. Beeckmann, S. Jacobs, H. Minwegen, K.A. Heufer, H. Pitsch and K. Leonhard. Combustion chemistry of diethoxymethane (DEM): experiments, theory and modeling. In Sixth International Conference - Tailor-Made Fuels from Biomass, Aachen, Germany, 2018.
• Joachim Beeckmann, Raik Hesse, Stephan Kruse, André Berens, Norbert Peters, Heinz Pitsch and Moshe Matalon. Propagation speed and stability of spherically expanding hydrogen/air flames: Experimental study and asymptotics. Proceedings of the Combustion Institute, vol. 36 no. 1, page 1531–1538, 2017.