TY - CONF A1 - Mitropetros, Constantinos T1 - Bubble explosions T2 - Sicherheitstechnisches Seminar am Istitut für Prozess- und Anlagentechnik der TU-Berlin CY - Berlin, Germany DA - 2004-07-14 PY - 2004 AN - OPUS4-5343 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Fomine, Pavel A1 - Trotsyuk, A.V. A1 - Vasil´ev, A.A. A1 - Mitropetros, Constantinos A1 - Hieronymus, Hartmut A1 - Roekaerts, D. T1 - Model of chemical reaction kinetics for calculating detonation processes in gas and heterogeneous mixtures containing hydrogen peroxide N2 - An approximate two-stage kinetic model of the chemical reaction in hydrogen-oxygen mixtures containing hydrogen peroxide, water, and inert diluents is developed. The model includes one differential equation for the calculation of the molar mass of the gas after the induction period and algebraic formulas for the calculation of the heat release, internal energy and thermodynamic parameters of the mixture. Based on this model, 2D numerical simulations of a multifront gas detonation wave are performed. These pioneering simulations correspond to the stoichiometric hydrogen-oxygen mixture with hydrogen peroxide and argon additions. An approximate model of chemical equilibrium in heterogeneous gas-condensed phase systems containing hydrogen peroxide is presented. KW - H2O2 KW - Chemical kinetics KW - Detonation PY - 2006 DO - https://doi.org/10.1080/00102200500270023 SN - 0010-2202 SN - 1563-521X VL - 178 IS - 5 SP - 895 EP - 919 PB - Gordon and Breach CY - New York, NY AN - OPUS4-12394 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mitropetros, Constantinos A1 - Fomine, Pavel A1 - Hieronymus, Hartmut T1 - Behavior of the surface of a buddy liquid after detonation wave impact N2 - In safety engineering, one position of interest inside heterogeneous systems of the type liquid–gas is the contact surface between these two phases. Under certain conditions, e.g. shock wave impact, phenomena can take place at this position that can have a significant influence on the explosion behavior of the system. In this work an investigation is presented about the existence of such phenomena on the surface of liquid cyclohexane with or without the existence of oxygen containing bubbles. The observations have been performed during the time before, as well as after, a detonation wave reflection on that surface. High-speed pressure and optical measurements have been applied. Apart from the experimental observations, also a theoretical analysis and discussion is presented in this contribution, which contains the comparison between calculated and experimental values. KW - Liquid surface KW - Aerosol KW - Film KW - Droplets KW - Foam KW - Bubble KW - Detonation reflection KW - Shock wave KW - Explosion hazard KW - Shock induced PY - 2006 DO - https://doi.org/10.1007/s00348-005-0081-x SN - 0723-4864 SN - 1432-1114 VL - 40 IS - 3 SP - 431 EP - 441 PB - Springer CY - Berlin AN - OPUS4-12367 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hieronymus, Hartmut A1 - Mitropetros, Constantinos A1 - Bender, Josef A1 - Seeger, Hansjörg A1 - Seifert, Stefan A1 - Wendler, Reinhold A1 - Plewinsky, Bodo T1 - Heterogene Explosionen PY - 2002 SN - 1434-9728 SN - 1436-4948 SN - 0372-2457 SN - 0376-1185 VL - 43 IS - 3 SP - 39 EP - 45 PB - Springer-VDI-Verl. CY - Düsseldorf AN - OPUS4-1309 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Mitropetros, Constantinos A1 - Hieronymus, Hartmut A1 - Fomin, P. A1 - Taratuta, S. ED - Doerffer, P. T1 - Modeling of detonation wave initiation, limits and hazard of chemically active bubbles T2 - 5th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows ; 5th ISAIF CY - Gdansk, Poland DA - 2001-09-04 PY - 2001 SN - 83-88237-35-7 VL - 2 SP - 925 EP - 933 PB - IFFM Publ. CY - Gda´ nsk AN - OPUS4-1158 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mitropetros, Constantinos A1 - Hieronymus, Hartmut A1 - Seeger, Hansjörg A1 - Plewinsky, Bodo A1 - Steinbach, J. T1 - Explosionsverhalten von Sauerstoffblasen in reinem Cyclohexan unter Stoßwellenbelastung N2 - Experimente der vergangenen 15 Jahre haben bestätigt, dass sauerstoffhaltige Blasen in einer organischen Flüssigkeit durch eine Stoßwelle zur Explosion gebracht werden können. Obwohl dieses Phänomen für die Risikoanalyse entsprechender chemischer Prozesse in der chemischen Industrie von großer Bedeutung ist, ist die Zahl der Lösemittel, an denen Blasenexplosionsuntersuchungen durchgeführt worden sind, stark begrenzt. In der vorliegenden Arbeit wird das Explosionsverhalten von Sauerstoffblasen in reinem Cyclohexan unter der Einwirkung einer Stoßwelle untersucht. In diesem Beitrag werden Hochgeschwindigkeitsfotos vorgestellt, die die Existenz von Rußbildung an der Position der Sauerstoffblasen nach dem Durchgang der Stoßwelle andeuten. Die vorgestellten Untersuchungen sind Teil eines von der Deutschen Forschungsgemeinschaft geförderten Forschungsprojektes. T2 - Frühjahrstagung der Fachverbände Kurzzeitphysik [und] Plasmaphysik CY - Bochum, Deutschland DA - 2002-03-18 PY - 2002 UR - http://old.dpg-tagungen.de/archive/2002/k_4.html SN - 0420-0195 SN - 0372-5448 SN - 0343-9216 IS - K 4.1 SP - 16 CY - Bad Honnef AN - OPUS4-1320 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mitropetros, Constantinos A1 - Fomin, P. A. A1 - Hieronymus, Hartmut A1 - Steinbach, J. T1 - Modelling of detonation wave parameters, initiation and hazard of chemically active bubble systems N2 - The detonation processes in chemically active bubble systems at high initial pressures are calculated numerically. The dependences of detonation wave velocity at sub- and supersonic regimes of propagation on molar fraction of gas in the mixture and on initial pressure have been calculated for the first time. The Chapman-Jouguet condition for supersonic bubble detonation wave is obtained. The principal possibility for a different detonation wave structure in the case of propagation in the mixture with high initial pressure and longitudinal gradient of bubble volume fraction is predicted. The dynamics and ignition of a chemically active bubble in a field of external pressure is analyzed. It is shown, that an inert diluent addition can increase the explosion hazard of heterogeneous gas - liquid systems. Calculations demonstrate the possibility of chemically active bubble ignition on the second pulsation. It is shown, that single chemically active bubble ignition is possible also owing to a decompression impulse. An algorithm for the calculation of thermodynamic parameters of chemically equilibrium hydrocarbon gas with soot particles has been suggested. It is shown, that soot formation can have an essential influence on the dynamics of single bubble in chemically active hydrocarbon-oxygen (organic solvent (liquid) - oxidizer (gas)) heterogeneous systems. T2 - 4th International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions ; 4th ISHPMIE ; 10th International Colloquium on Dust Explosions ; 5th Colloquium on Gas, Vapor, Liquid, Hybrid Explosions CY - Bourges, France DA - 2002-10-21 PY - 2002 DO - https://doi.org/10.1051/jp4:20020309 SN - 1155-4339 VL - 12 IS - 7 SP - 403 EP - 412 PB - EDP Sciences CY - Les Ulis AN - OPUS4-1640 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Fomine, Pavel A1 - Mitropetros, Constantinos A1 - Hieronymus, Hartmut ED - Roy, G. D. T1 - Bubble ignition in chemically active heterogeneous systems T2 - International Colloquium on Advances in Confined Detonations CY - Moscow, Russia DA - 2002-07-02 PY - 2002 SN - 5-945880-08-6 SP - 167 EP - 170 PB - Torus Press CY - Moskva AN - OPUS4-1974 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -