165 citations · 368 across the 20 of their papers we have counts for
20 papers
Assessment of turbulent fire dynamics and combustion instabilities using a flamelet model
Yunxiao Yan, Fabian Brännström, Christian Hasse +1
The Sandia one-meter methane fire plume is an established benchmark for turbulent combustion modeling of large-scale flames. This study investigates the combustion instabilities fo…
A Novel Approach for Direct Measurement of the Stretch Factor in Laminar Premixed Hydrogen-Air Flames Affected by Thermodiffusive Instabilities
Marcel Marburger, Christoph Möller, Andrew MacFarlane +5
This study introduces a novel experimental configuration using OH-PLIF imaging to directly determine the stretch factor () in laminar premixed hydrogen flames transitioning fr…
Direct numerical simulation of thermo-diffusively unstable premixed hydrogen-air flames in a fully-developed turbulent channel flow at
Felix Rong, Max Schneider, Hendrik Nicolai +2
Direct Numerical Simulations (DNS) of premixed hydrogen-air flames anchored in a fully-developed turbulent channel flow (TCF) are performed at a friction Reynolds number of $\mathr…
Spray flamelet structures in a tubular counterflow configuration
Francisco Rivadeneira, Felipe Huenchuguala, Arne Scholtissek +3
In this work, spray flamelet structures subject to curvature are systematically studied, emphasizing the ways in which this quantity modifies the budgets of the corresponding flame…
Unsteady solutions of the spray flamelet equations
Felipe Huenchuguala, Francisco Rivadeneira, Arne Scholtissek +3
Solutions of the spray flamelet equations reported in the literature during the last decade have been limited to very specific situations presenting steady evaporation profiles onl…
An Entropy-Stable/Double-Flux scheme for the multi-component compressible Navier-Stokes equations
Vahid Badrkhani, T. Jeremy P. Karpowsk, Christian Hasse
We present a novel combination of numerical techniques to improve the efficiency, accuracy, and robustness of multi-component compressible flow simulations. At the core of our appr…
Numerical Analysis of the Stability of Iron Dust Bunsen Flames
Thijs Hazenberg, Daniel Braig, Johannes Mich +2
This article presents numerical simulations of the response of an iron dust Bunsen flame to particle seeding changes. A validated numerical model is used to study the impact of par…
Analyzing Iron Dust Bunsen Flames using Numerical Simulations
Thijs Hazenberg, Danial Braig, Michal A. Fedoryk +7
This article presents numerical simulations of an iron dust Bunsen flame. The results are validated against experimental results. The burning velocity is extracted from the 3D simu…
Flame-wall interaction of thermodiffusively unstable hydrogen/air flames -- Part I: Characterization of governing physical phenomena
Max Schneider, Hendrik Nicolai, Vinzenz Schuh +2
Hydrogen combustion systems operated under fuel-lean conditions offer great potential for low emissions. However, these operating conditions are also susceptible to intrinsic therm…
Advantages of the adoption of a generalized flame displacement velocity as a central element of flamelet theory
Hernan Olguin, Pascale Domingo, Luc Vervisch +2
In combustion theory, flames are usually described in terms of the dynamics of iso-surfaces of a specific scalar. The flame displacement speed is then introduced as a local variabl…
On the closure of curvature in 2D flamelet theory
Hernan Olguin, Pascale Domingo, Luc Vervisch +2
So far, flamelet theory has treated curvature as an independent parameter requiring specific means for closure. In this work, it is shown how the adoption of a two-dimensional orth…
Carrier-phase DNS of ignition and combustion of iron particles in a turbulent mixing layer
Tien Duc Luu, Ali Shamooni, Andreas Kronenburg +9
Three-dimensional CP-DNS of reacting iron particle dust clouds in a turbulent mixing layer are conducted. The simulation approach considers the Eulerian transport equations for the…
Application of dense neural networks for manifold-based modeling of flame-wall interactions
Julian Bissantz, Jeremy Karpowski, Matthias Steinhausen +5
Artifical neural networks (ANNs) are universal approximators capable of learning any correlation between arbitrary input data with corresponding outputs, which can also be exploite…
Numerical Investigation of the Local Thermo-Chemical State in a Thermo-Acoustically Unstable Dual Swirl Gas Turbine Model Combustor
T. Jeremy P. Karpowski, Federica Ferraro, Matthias Steinhausen +6
In this work, the thermo-acoustic instabilities of a gas turbine model combustor, the so-called SFB606 combustor, are numerically investigated using Large Eddy Simulation (LES) com…
The potential of retrofitting existing coal power plants: a case study for operation with green iron
Johannes Janicka, Paulo Debiagi, Arne Scholtissek +5
Storing electrical energy for long periods and transporting it over long distances is an essential task of the necessary transition to a CO-free energy economy. An oxidation-re…
Techno-economic assessment of long-distance supply chains of energy carriers: Comparing hydrogen and iron for carbon-free electricity generation
Jannik Neumann, Rodolfo Cavaliere Da Rocha, Paulo Debiagi +4
Effective usage of renewable energy requires ways of storage and delivery to balance energy demand and availability divergences. Carbon-free chemical energy carriers are proposed s…
Turbulent flame-wall interaction of premixed flames using Quadrature-based Moment Methods (QbMM) and tabulated chemistry: An a priori analysis
M. Steinhausen, T. Zirwes, F. Ferraro +4
Presumed probability density function (PDF) and transported PDF methods are commonly applied to model the turbulence chemistry interaction in turbulent reacting flows. However, lit…
Iron as a sustainable chemical carrier of renewable energy: Analysis of opportunities and challenges for retrofitting coal-fired power plants
Paulo Debiagi, Rodolfo Cavaliere da Rocha, Arne Scholtissek +2
As a result of the 2021 United Nations Climate Change Conference (COP26), several countries committed to phasing down coal electricity as soon as possible, deactivating hundreds of…
Particle formation in oxymethylene ethers (OMEn, n = 2-4) / ethylene premixed flames
Robert Schmitz, Federica Ferraro, Mariano Sirignano +1
Alternative synthetic fuels can be produced by renewable energy sources and represent a potential route for solving long-term energy storage. Among them, oxygenated fuels have the…
Experimental and numerical study on the effect of oxymethylene ether-3 (OME3) on soot particle formation
Federica Ferraro, Carmela Russo, Robert Schmitz +2
The reduction and control of particulate matter generated by fossil fuel combustion are among the main issues for actual and future combustion devices due to the increasingly strin…