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Taveau, J.R. (author), Hochgreb, Simone (author), Lemkowitz, S.M. (author), Roekaerts, D.J.E.M. (author)Metal dust deflagrations have become increasingly common in recent years. They are also more devastating than deflagrations involving organic materials, owing to metals' higher heat of combustion, rate of pressure rise, explosion pressure and flame temperature. Aluminum finishing operations offer a particularly significant hazard from the...journal article 2018
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Augusto Viviani Perpignan, A.A.V. (author), Gangoli Rao, A. (author), Roekaerts, D.J.E.M. (author)Since its discovery, the Flameless Combustion (FC) regime has been seen as a promising alternative combustion technique to reduce pollutant emissions of gas turbine engines. This combustion mode is often characterized by well-distributed reaction zones, which can potentially decrease temperature gradients, acoustic oscillations and,...review 2018
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Zhu, S. (author), Pozarlik, Artur (author), Roekaerts, D.J.E.M. (author), Correia Rodrigues, H.R. (author), van der Meer, Theo (author)In the past 25 years high temperature air combustion (HiTAC) technology has been proved and utilized in industry as a promising way to increase thermal efficiency, create a relatively uniform temperature distribution, and reduce emissions of harmful pollutants such as NO<sub>X</sub> and CO. However, due to the complexity of fuel-oil...journal article 2018
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Silvestri, S. (author), Patel, A. (author), Roekaerts, D.J.E.M. (author), Pecnik, Rene (author)The present work consists of an investigation of the turbulence radiation interaction (TRI) in a radiative turbulent channel flow of grey gas bounded by isothermal hot and cold walls. The optical thickness of the channel is varied from 0.1 to 10 to observe different regimes of TRI. A high-resolution finite volume method for radiative heat...journal article 2018
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Knobbe, E (author), Roekaerts, D.J.E.M. (author)This contribution presents an outline of a new mathematical formulation for<br/>Classical Non-Equilibrium Thermodynamics (CNET) based on a contact<br/>structure in differential geometry. First a non-equilibrium state space is introduced as the third key element besides the first and second law of thermodynamics.<br/>This state space provides the...journal article 2017
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Huang, X. (author), Tummers, M.J. (author), Roekaerts, D.J.E.M. (author)Flameless combustion, named as Moderate or Intense Low-oxygen Dilution (MILD) combustion or high-temperature air combustion (HiTAC), is a promising technology to improve the thermal efficiency while suppressing NOx formation in combustion systems. Flameless combustion can occur when fresh air (and/or fuel)...abstract 2017
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Ma, L. (author), Huang, X. (author), Roekaerts, D.J.E.M. (author)We report results of a computational study of oxy-fuel spray jet flames. An experimental database on flames of ethanol burning in a coflow of a O2–CO2 mixture, created at CORIA (Rouen, France), is used for model validation (Cléon et al., 2015). Depending on the coflow composition and velocity the flames in these experiments start at nozzle (type...journal article 2017
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Taveau, J.R. (author), Going, J. E. (author), Hochgreb, S. (author), Lemkowitz, S.M. (author), Roekaerts, D.J.E.M. (author)Dust explosibility is traditionally described by two parameters, namely the maximum explosion pressure, P<sub>max</sub>, and the deflagration index, K<sub>St</sub>, usually determined through testing in a closed, pressure-resistant spherical vessel, either 20 L or 1 m<sup>3</sup> in volume. These parameters constitute key variables in the...journal article 2017
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Huang, X. (author), Tummers, M.J. (author), Roekaerts, D.J.E.M. (author)Mild combustion in a lab-scale furnace has been experimentally and numerically studied. The furnace was operated with Dutch natural gas (DNG) at 10 kW and at an equivalence ratio of 0.8. OH∗chemiluminescence images were taken to characterize the reaction zone. The chemiluminescence intensity is relatively low compared to conventional flames...conference paper 2017
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Pecnik, Rene (author), Smit, S.H.H.J. (author), Patel, A. (author), Roekaerts, D.J.E.M. (author)In this paper we investigate and compare two dierent solar receiver technologies for concentrated solar power plants operating with supercritical CO2. The rst receiver is based on conventional surface absorbers, while the second receiver is based on an innovative idea to use volumetric receivers where sunlight is transmitted through a...conference paper 2016
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Bao, H. (author), Huang, X. (author), Roekaerts, D.J.E.M. (author)The Delft Jet-in Hot Coflow (DJHC) burner is used to investigate flameless combustion by imitating the recirculation flow characteristics appearing in a real complex furnace via a hot diluted coflow[1]. A welldefined stream of high temperature, low oxygen concentration combustion products is injected around the...abstract 2016
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Roekaerts, D.J.E.M. (author), Bao, H. (author), Huang, X. (author), Vasavan, A. (author), van Oijen, J.A. (author), Labahn, J. (author), Devaud, C. (author)We report on a comparative study of model predictions of jet-in-hot-coflow flames. TheDelft Jet-in-Hot- Coflow (DJHC) burner was built to mimic the important characteristics of flameless combustion without the complications of a real furnace [1,2]. The DJHC burner has been used to create a turbulent diffusion...abstract 2016
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Huang, X. (author), Tummers, M.J. (author), Roekaerts, D.J.E.M. (author)Mild combustion in a lab-scale furnace has been experimentally and numerically studied. The furnace was operated with Dutch natural gas (DNG) at 10 kW and at an equivalence ratio of 0.8. OH∗chemiluminescence images were taken to characterize the reaction zone. The chemiluminescence intensity is relatively low compared to conventional flames...abstract 2016
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Ma, L. (author), Naud, B. (author), Roekaerts, D.J.E.M. (author)This paper presents a numerical modeling study of one ethanol spray flame from the Delft Spray-in-Hot-Coflow (DSHC) database, which has been used to study Moderate or Intense Low-oxygen Dilution (MILD) combustion of liquid fuels (Correia Rodrigues et al. Combust. Flame 162(3), 759–773, 2015). A “Lagrangian-Lagrangian” approach is adopted where...journal article 2015
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Ma, L. (author), Naud, B. (author), Roekaerts, D.J.E.M. (author)MILD Combustion, also known as flameless combustion, is attracting wide scientific interest due to its potential of high efficiency and low NOx emission. This paper focuses on the numerical modeling of one of the ethanol spray flame cases from the Delft Spray-in-Hot-Coflow (DSHC) burner, which has been used to study MILD oxidation of liquid...conference paper 2014
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Van der Voort, M.M. (author), Van den berg, A.C. (author), Roekaerts, D.J.E.M. (author), Xie, M. (author), De Bruijn, P.C.J. (author)Explosive evaporation of a superheated liquid is a relevant hazard in the process industry. A vessel rupture during storage, transport or handling may lead to devastating blast effects. In order to assess the risk associated with this hazard or to design protective measures, an accurate prediction model for the blast generated after vessel...journal article 2012
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De, A. (author), Oldenhof, E. (author), Sathiah, P. (author), Roekaerts, D. (author)In this paper, we report results of a numerical investigation of turbulent natural gas combustion for a jet in a coflow of lean combustion products in the Delft-Jet-in-Hot-Coflow (DJHC) burner which emulates MILD (Moderate and Intense Low Oxygen Dilution) combustion behavior. The focus is on assessing the performance of the Eddy Dissipation...journal article 2011
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Molenaar, D.J. (author), Weerheijm, J. (author), Vervuurt, A. (author), Burggraaf, H. (author), Roekaerts, D. (author), Meijers, P. (author)Verkeerstunnels en overkapte wegen (landtunnels) komen de milieukundige en stedenbouwkundige inpassing ten goede en maken meervoudig ruimtegebruik in de stad mogelijk. Het aantal tunnels en overkappingen groeit dan ook. Dit maakt het vervoer van explosiegevaarlijke stoffen en onder hoge druk vervoerde gassen steeds moeilijker, want tankwagens...report 2009
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Joint Scalar versus Joint Velocity-Scalar PDF Simulations of Bluff-Body Stabilized Flames with REDIMMerci, B. (author), Naud, B. (author), Roekaerts, D. (author), Maas, U. (author)Two transported PDF strategies, joint velocity-scalar PDF (JVSPDF) and joint scalar PDF (JSPDF), are investigated for bluff-body stabilized jet-type turbulent diffusion flames with a variable degree of turbulence–chemistry interaction. Chemistry is modeled by means of the novel reaction-diffusion manifold (REDIM) technique. A detailed chemistry...journal article 2008
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- Merci, B. (author), Naud, B. (author), Roekaerts, D. (author) journal article 2007