TY - GEN A1 - Drame, Christian A1 - Lohrer, Christian A1 - Arndt, Detlef A1 - Grätz, Rainer A1 - Förster, H. ED - Stolz, T. T1 - Untersuchung von Deflagrationen in geschlossenen Rohrleitungen T2 - 228. PTB-Seminar CY - Braunschweig, Deutschland DA - 2007-06-26 KW - Deflagration KW - Geschlossene Rohrleitung KW - Propan PY - 2007 SN - 978-3-86509-700-2 SP - 27 EP - 33 PB - Wirtschaftsverlag N. W. Verlag für neue Wissenschaft CY - Bremerhaven AN - OPUS4-14996 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Lohrer, Christian A1 - Drame, Christian A1 - Arndt, Detlef A1 - Grätz, Rainer A1 - Schönbucher, A. T1 - Explosion processes and DDT of various flammable gas/air mixtures in long closed pipes containing obstacles T2 - Hazards XX - "Process Safety and Environmental Protection" CY - Manchester, UK DA - 2008-04-15 KW - Deflagration KW - Detonation KW - DDT KW - MESG KW - Obstacles PY - 2008 SN - 978-0-85295-523-9 IS - Symposium Series No. 154 SP - 247 EP - 261 AN - OPUS4-17451 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lohrer, Christian A1 - Drame, Christian A1 - Schalau, Bernd A1 - Grätz, Rainer T1 - Propane/air deflagrations and CTA measurements of turbulence inducing elements in closed pipes N2 - The current paper presents experimental investigations on several influence parameters of deflagrations in long closed pipes. The experiments were carried out with different propane/air mixtures, various length-to-diameter ratios (up to L/D=143, D=0.159 m) and miscellaneous initial pressures. Maximum values of explosion pressures and flame speeds were found at stoichiometric propane/air compositions. With increasing L/D, the explosion pressures decreased while higher flame speeds were determined. In addition, elevated initial pressures led to rising explosion pressures. Furthermore, it is well known that turbulence inducing elements in pipes, ducts or vessels enhance the heat and mass transfer during reactive flows. This may lead to a significant acceleration of ongoing gaseous reactions and could finally cause a deflagration to detonation transition (DDT) aligned with much higher pressures and flame speeds. Therefore, constant temperature anemometry (CTA) measurements were carried out to describe the influence of frequently used flange assemblies and baffles on the velocity and turbulence distributions of air flows in steel pipes similar to those in the explosion measurements. The experiments showed that in contrast to flange assemblies, baffles caused a significant increase of the turbulence intensity in pipe flows. KW - Deflagrations KW - Flame speed KW - Explosion pressure KW - CTA PY - 2008 DO - https://doi.org/10.1016/j.jlp.2007.06.003 SN - 0950-4230 SN - 1873-3352 VL - 21 IS - 1 SP - 1 EP - 10 PB - Butterworth CY - Guildford, Surrey AN - OPUS4-16451 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Drame, Christian A1 - Lohrer, Christian A1 - Arndt, Detlef A1 - Grätz, Rainer A1 - Schönbucher, A. T1 - Deflagrationen von Propan/Luft-Gemischen in geschlossenen Rohrleitungen T2 - ProcessNet Jahrestagung 2007 (Dechema, VDI-GVC) CY - Aachen, Germany DA - 2007-10-16 PY - 2007 AN - OPUS4-15010 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Drame, Christian A1 - Stolpe, F. A1 - Förster, H. A1 - Schönbucher, A. T1 - Explosionsverhalten von Brennstoof/Luft-Gemischen in geschlossenen Rohrleitungen T2 - 9. Fachtagung Anlagen-, Arbeits- und Umweltsicherheit CY - Köthen, Germany DA - 2008-11-06 PY - 2008 AN - OPUS4-18353 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Drame, Christian A1 - Stolpe, F. A1 - Förster, H. A1 - Schönbucher, A. T1 - Explosionsverhalten von Brennstoff/Luft-Gemischen in geschlossenen Rohrleitungen KW - Deflagration KW - Geschlossene Rohrleitung KW - Wandrauhigkeit KW - Rohrlänge KW - Brennstoffe PY - 2008 SN - 978-3-89746-099-7 SP - 1 EP - 11 PB - VDI, Hallescher Bezirksverein CY - Halle AN - OPUS4-18414 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Drame, Christian A1 - Poli, Marco T1 - Experimentelle und numerische Untersuchungen des Explosionsverhaltens von Brennstoff/Luft-Gemischen T2 - Fachbereichskolloquium FB 8.4 CY - Berlin, Germany DA - 2008-11-27 PY - 2008 AN - OPUS4-18495 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Drame, Christian A1 - Lohrer, Christian A1 - Arndt, Detlef A1 - Grätz, Rainer A1 - Förster, H. T1 - Untersuchung von Deflagrationen in geschlossenen Rohrleitungen T2 - BAM-PTB-Kolloquium CY - Braunschweig, Germany DA - 2007-07-26 PY - 2007 AN - OPUS4-14610 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - THES A1 - Drame, Christian T1 - Ausbreitung von Deflagrationen in geschlossenen langen Rohrleitungen KW - Explosionsschutz KW - Deflagration KW - Rohrleitungen PY - 2010 SP - 1 EP - 114 AN - OPUS4-22877 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -