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 - JOUR A1 - Mitropetros, Constantinos A1 - Fomine, Pavel A1 - Seeger, Hansjörg A1 - Bender, Josef A1 - Seifert, Stefan A1 - Steinbach, J. A1 - Plewinsky, B. A1 - Hieronymus, Hartmut T1 - Shock induced bubble explosion in a monodispersed organic liquid T2 - Plasma Physics and Short Time Scale Physics Spring Meeting CY - Aachen, Germany DA - 2003-03-24 PY - 2003 SN - 0420-0195 SN - 0372-5448 SN - 0343-9216 VL - 38-4 IS - K 5.9 SP - 22 CY - Bad Honnef AN - OPUS4-2743 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mitropetros, Constantinos A1 - Fomine, Pavel A1 - Seeger, Hansjörg A1 - Bender, Josef A1 - Seifert, Stefan A1 - Steinbach, J. A1 - Plewinsky, B. A1 - Hieronymus, Hartmut T1 - Cavitation after shock wave propagation inside a chemically active organic bubbly liquid T2 - Plasma Physics and Short Time Scale Physics Spring Meeting CY - Aachen, Germany DA - 2003-03-24 PY - 2003 SN - 0420-0195 SN - 0372-5448 SN - 0343-9216 VL - 38-4 IS - K 5.10 SP - 22 CY - Bad Honnef AN - OPUS4-2744 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mitropetros, Constantinos A1 - Fomine, Pavel A1 - Seeger, Hansjörg A1 - Bender, Josef A1 - Seifert, Stefan A1 - Steinbach, J. A1 - Plewinsky, B. A1 - Hieronymus, Hartmut T1 - Detonation Wave Impact on the Surface of a Chemically Active Organic Bubbly Liquid T2 - Plasma Physics and Short Time Scale Physics Spring Meeting CY - Aachen, Germany DA - 2003-03-24 PY - 2003 SN - 0420-0195 SN - 0372-5448 SN - 0343-9216 VL - 38-4 IS - K 5.8 SP - 22 CY - Bad Honnef AN - OPUS4-2742 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Stajanca, Pavol A1 - Baensch, Franziska A1 - Baer, Wolfram A1 - Chruscicki, Sebastian A1 - Homann, Tobias A1 - Seifert, Stefan A1 - Schmidt, Dirk A1 - Weltschev, Margit A1 - Wossidlo, Peter A1 - Habib, Abdel Karim T1 - Monitoring of pipes by distributed acoustic fibre optic sensors – A large-scale test on a pipeline under realistic operation condition N2 - The monitoring of oil and gas pipelines by means of distributed fibre optic sensors is becoming common. The most recent development in the field of fibre optic sensing is the distributed acoustic sensing (DAS), which allows to detect and to localize third party threats to pipelines. For this purpose, fibre optic telecommunication cables located close to the pipelines are usually used. However, DAS carries a far greater potential for continuous condition monitoring of pipelines. The interdisciplinary research project AGIFAMOR (Ageing Infrastructures – Fibre Optic Monitoring of Pipes) at BAM investigates a new technical approach to extend the application field of DAS towards the detection and localization of acoustic signals that indicate critical alterations and certain damage scenarios originated from within the pipeline or the pipe wall. Therefore, the optical fibre sensors are applied onto the pipe itself and the application procedure towards an optimal acoustic signal transduction is optimized. A number of laboratory scale experiments were performed focusing on the signal transmission of acoustic signals as well as the detection of damages in the pipe wall by means of DAS. Furthermore, real-scale tests on a pipeline DN100 of 38m length have been carried out at the BAM test site for technical safety (BAM-TTS) to study the detection and localization of leaks and of changing flow profiles due to corrosion or sedimentation processes. T2 - 13th Pipeline Technology Conference CY - Berlin, Germany DA - 12.03.2018 KW - Pipeline monitoring KW - Distributed acoustic sensing KW - Fiber optic sensing PY - 2018 SN - 2198-428X SP - Poster session, paper 9, 1 EP - 8 PB - EITEP (Euro Institute for Information and Technology Transfer in Environmental Protection) CY - Hannover AN - OPUS4-44519 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Stajanca, Pavol A1 - Chruscicki, Sebastian A1 - Homann, Tobias A1 - Seifert, Stefan A1 - Schmidt, Dirk A1 - Habib, Abdel Karim T1 - Detection of leak-induced pipeline vibrations using fiber-optic distributed acoustic sensing N2 - In the presented work, the potential of fiber-optic distributed acoustic sensing (DAS) for detection of small gas pipeline leaks (<1%) is investigated. Helical wrapping of the sensing fiber directly around the pipeline is used to increase the system sensitivity for detection of weak leak-induced vibrations. DAS measurements are supplemented with reference accelerometer data to facilitate analysis and interpretation of recorded vibration signals. The results reveal that a DAS system using direct fiber application approach is capable of detecting pipeline natural vibrations excited by the broadband noise generated by the leaking medium. In the performed experiment, pipeline vibration modes with acceleration magnitudes down to single ug were detected. Simple leak detection approach based on spectral integration of time-averaged DAS signals in frequency domain was proposed. Potential benefits and limitations of the presented monitoring Approach were discussed with respect to its practical applicability. We demonstrated that the approached is potentially capable of detection and localization of gas pipeline leaks with leak rates down to 0.1% of the pipeline flow volume and might be of interest for monitoring of short- and medium-length gas pipelines. KW - Distributed acoustic sensing KW - DAS KW - Distributed vibration sensing KW - DVS KW - Fiber-optic sensors KW - Pipeline monitoring KW - Leak detection KW - Pipeline vibrations PY - 2018 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-457953 UR - http://www.mdpi.com/1424-8220/18/9/2841 DO - https://doi.org/10.3390/s18092841 SN - 1424-8220 VL - 18 IS - 9 SP - 2841, 1 EP - 18 PB - MDPI AN - OPUS4-45795 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -