TY - CONF A1 - Weltschev, Margit A1 - Bäßler, Ralph A1 - Otremba, Frank T1 - Use of higher-alloyed metallic materials and duplex steels for transport tanks of dangerous goods T2 - Stainless steel world conference & exhibition 2011 (Proceedings) N2 - Compatibility evaluations of selected metallic materials under the influence of dangerous goods are published in the BAM-List - Requirements for Tanks for the Transport of Dangerous Goods” as basis for substance-related prototype approvals for tank Containers designed for the carriage of dangerous goods. There is a request of the tank manufacturing industry and transportation Companies to incorporate additional materials into the BAM-List, especially corrosion-resistant materials because of the large number of corrosive dangerous goods. One solution to solve corrosion Problems is to line the tank with a polymer, an alternative solution is the application of high-alloyed stainless steels and nickel-based alloys as there are 1.4529 (XINiCrMoCu 25-20-7, alloy 926), 1.4562 (X1NiCrMoCu32-28-7, alloy 31) and 2.4605 (NiCr23Mo16AI, alloy 59). There is an interest to use cost-efficient steels with high strength values and concomitant adequate corrosion resistance such as duplex steel 1.4362 (X2CrNiN23-4). This steel grade was originally developed as a substitute for the austenitic grades 1.4404 (X2CrNiMo17-12-2) and 1.4571 (X6CrNiMoTi17-12-2). Due to the lower content of the alloy elements nickel and molybdenum this duplex steel is a cost-efficient alternative to molybdenum containing austenite. Due to the limited number of corrosion test results with welded test samples of these high-alloyed materials and the duplex steel under the influence of corrosive dangerous goods a comprehensive test Programme was performed with these materials in Cooperation with ThyssenKrupp VDM and Deutsche Edelstahlwerke GmbH. It can be concluded from the test results that the superaustenitic steels 1.4529 and 1.4562 as well as the nickel-based alloy 2.4605 are a really good alternative as tank materials for the transport of dangerous goods in comparison to the lining of the tanks. The nickel-based alloy 2.4605 shows the best resistance and is suitable as material for tanks transporting all tested corrosive substances. One exception is the temperature limit during the transport of hydrochloric acid. The superaustenit 1.4562 is a resistant material with a wide ränge of application. Exceptions for use are: ammonium bifluoride, brine, 34 % calcium Chloride solution, hydrochloric acid, perchloric acid, 90 % 2-chloropropionic acid, nitrating acid with nitric acid content > 50 % and molten monochloroacetic acid. The alloy is limited suitable for allyl Chloride, aluminum Chloride, copper (II) -Chloride and ferric Chloride. The superaustenit 1.4529 showed the lowest resistance compared to the other two materials. This steel is not resistant in hydrochloric acid, perchloric acid, sodium Chlorite and sodium hypochlorite. The application is limited in the concentration ränge of aqueous Solutions of aluminum Chloride, copper (II) Chloride and ferric Chloride. Due to the reduced alloying content of the duplex steel 1.4362 (X2CrNiN23-4) compared to the austenitic CrNiMo-steels, a lower resistance especially in acidic media like formic, acetic or sulfuric acid was observed. Within the more than 7.000 substances contained in the BAM-List there is a large amount of dangerous goods such as hydrocarbons, alcohols, aldehydes, ketones, ethers, esters, and inorganic alkaline substances which have a large transport volume and do not corrode the duplex steel 1.4362 (X2CrNiN23-4). The test results are included in the actual 11th edition of the BAM-List and therefore available for the costumer. T2 - Stainless steel world conference & exhibition 2011 CY - Maastricht, The Netherlands DA - 29.11.2011 KW - Duplexstahl KW - Tankcontainer KW - Tankfahrzeuge KW - Beständigkeitsbewertung KW - BAM-Liste PY - 2011 SP - 1 EP - 12 PB - KCI Publ. AN - OPUS4-24975 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Romero-Navarrete, José A. A1 - Otremba, Frank A1 - Betanzo Quezada, E. A1 - Obregón Biosca, S. A. T1 - The railway transport sustainability in Mexico. Europe and Mexico perspective N2 - The use of railway transportation for satisfying the transport needs of goods in Mexico is less intense than in developed countries, such as Germany. Mexican performance measures based upon the railway length per capita (intensity), or the railway length per square km of the country surface (density), are well behind from corresponding indicators for Germany, in such a way that the length of the railway infrastructure of Mexico should be, at least, doubled in order to reach a comparable intensity rate as that of Germany. In this paper, the benefits from transferring the whole transportation of goods from road to railway, is discussed. The benefits include a remarkable reduction in energy consumption and CO2 emissions. The feasibility for the electrical infrastructure to provide the necessary energy is further shown, while the economic feasibility of such situation is analyzed on the basis of the federal budget of Mexico. According to these estimations, the investment in railway infrastructure is feasible, while the electrical installed capacity is enough to satisfy an all-electric system. T2 - XIV Congreso Internacional de Ingenieria (XIV International Engineering Congress) CY - Querétaro, Mexico DA - 14.05.2018 KW - Railways KW - Trucking KW - Transport externalities KW - Comparative assessment KW - Energy saving potentials PY - 2018 SN - 978-1-5386-7018-7 SP - 1 EP - 4 PB - IEEE AN - OPUS4-45823 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Werner, Jan A1 - Kutz, P. W. A1 - Otremba, Frank T1 - Testing of Small Scale Tank Prototypes under Cryogenic Conditions T2 - 4Th international conference on energy supply and energy efficiency in Baku Azerbaijan and 5 years neseff N2 - Climate change, CO2 reduction, resource efficiency are only 3 current keywords that describe the current industrial-economic situation. In order to influence climate change effectively, the conversion of supply systems with technically usable forms of energy must succeed in the next decade. The international network founded in Baku in 2015 bundles research activities in the broad field of energy supply and energy efficiency. Discuss current research approaches and results with scientists and experts from renowned universities and follow Azerbaijan's efforts to implement the energy revolution. T2 - Neseff 2020 CY - Online meeting DA - 28.09.2020 KW - Mud pumps KW - Mud circulation system KW - Pistons KW - Hydrostatic pressure KW - Friction wear KW - Ceramic liners KW - Tribology PY - 2020 SN - 978-3-940471-59-8 SP - 4 EP - 9 AN - OPUS4-52149 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Otremba, Frank A1 - Romero-Navarrete, José A. ED - Otremba, Frank ED - Romero-Navarrete, José A. T1 - Sloshing in Vertical Circular Tanks and Earthquakes Perturbations T2 - The World Congress on Engineering and Computer Science N2 - A simplified formulation is proposed in this paper to assess the proximity of the earthquake-related Perturbation frequencies to the natural sloshing frequencies of the liquid contained in vertical cylindrical tanks. The methodology is based upon an existing gravity-waves approach, which was developed for rectangular cross-section reservoirs, and is extended in this paper to analyze circular cross-section tanks. The experimental outputs of this paper show that the existing methodology correlates at 100% with experimental data in the case of rectangular containers; while the corresponding average error in the case of a conical container and a cylindrical container is 7% and 9.1 %, respectively. The full diameter of the cross section was considered. The use of sovalidated methodology to full scale tanks, suggests that cylindrical vertical tanks with a capacity lower than 700 m3, could be exposed to a resonance excitation when subjected to earthquake motions, regardless of the fill level. T2 - WCECS 2019 CY - San Francisco, CA, USA DA - 22.10.2019 KW - Sloshing KW - Tanks KW - Earthquake KW - Perturbation PY - 2019 SP - 1 EP - 6 PB - IA ENG CY - San Francisco AN - OPUS4-49407 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Romero-Navarrete, José A. A1 - Otremba, Frank A1 - Lozano Guzmán, A. A. T1 - Simulation of liquid cargo – vehicle interaction under lateral and longitudinal accelerations T2 - The 9th International Conference on Computational Methods N2 - Amongst the vehicle parameters influencing road safety, the carried cargo plays a critical role in the case of a liquid cargo, posing rollover risk and affecting the available friction forces for braking. While the lateral sloshing of the cargo within the vehicle´s compartments, can be excited when the vehicle negotiates a turn, the longitudinal motion of the cargo derives from changes of speed. The combination of both types of perturbations occurs when the vehicle brakes while negotiating a turn. In this paper, a two-pendulum formulation is used to simulate the lateral and longitudinal behavior of a vehicle when negotiating a braking in a turn maneuver. The suspension forces are thus calculated as the linear superposition of both models. Results suggest that the vehicle roll stability is affected by the cargo sloshing, with increments on the order of 100% in the lateral load transfer, for a 50% filled tank. On the other hand, the dispersion of the travelling speed also affects the lateral stability of such type of vehicles, as a function of the dispersion of the vehicle´s travelling speed. T2 - The 9th International Conference on Computational Methods (ICCM2018) CY - Rome, Italy DA - 06.08.2018 KW - Sloshing cargo KW - Road tankers KW - Pendulum analogy KW - Braking in a turn KW - Lateral load transfer ratio PY - 2018 SP - 88 EP - 102 PB - Scientech Publisher LLC AN - OPUS4-45821 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Romero Navaratte, José A. A1 - Otremba, Frank T1 - Scientific Society of Mechanical Engineers N2 - The efficiency and safety of railway transportation depends on many factors and operating conditions, associated to the vehicle, the infrastructure, the operator and the environment. From the vehicle-infrastracture perspective, some influential factors include the dynamics of the vehicle and infrastructure interaction when the vehicle operates on curved tracks. Düring such changes of direction, the vehicle dynamically responds to the lateral perturbation, producing a lateral load transfer that represents an increase of the wheel forces on one side of the track, as a function of the train operating conditions and track design, including track's geometry and over-elevation, and vehicle's operating speed as well as its inertial properties and dimensions. In this context, the lateral load transfer superimposes to tangential steering forces, which are developed when the vehicle enters the curved track, and stabilize once a steady state is attained if the vehicle travels along a constant radius track at constant speed. The magnitude of such tangential forces depends on a variety of factors, including the yaw stiffness of the bogie, and the friction at the centre plate. While the friction at the centre plate generates higher tangential forces on the track and a consequential greater rail wearing and lose of locomotive energy, such friction is also crucial to avoid the hunting phenomenon when the vehicle travels along tangents. In this paper, a mechanically active centre plate is proposed, which increases the friction torque at the centre plate when the vehicle travels along tangents, and reduces such a friction torque when the vehicle negotiates curved portions of the track. Such conceptual design includes the principles of Operation and a needed preliminary experimental model to assess the potential benefits as well as the feasibility of such equipment. T2 - 11th international conference on railway bogies and running gears CY - Budapest, Hungary DA - 09.09.2019 KW - Centre plate KW - Railway KW - Fiction PY - 2019 SP - 28 EP - 30 AN - OPUS4-49004 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Otremba, Frank A1 - Prabhakaran, A. A1 - Robitaille, A. A1 - Birk, A. M. A1 - Gonzalez III, F. T1 - Rail tank car total containment fire testing: results and observations T2 - Proceedings of the 2016 joint rail conference (JRC2016-5833) N2 - The frequent incidences of Non-Accident Releases (NARs) of lading from tank cars have resulted in an increasing interest in transporting hazardous materials in total Containment conditions (i.e., no pressure relief devices). T2 - Proceedings of the 2016 joint rail conference CY - Columbia, SC, USA DA - 12.04.2016 KW - Rail tank containment fire PY - 2016 SN - 978-0-7918-4967-5 SP - 1 EP - 8 AN - OPUS4-35772 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gonzalez III, F. A1 - Prabhakaran, A. A1 - Robitaille, A. A1 - Booth, G. A1 - Birk, A.M. A1 - Otremba, Frank T1 - Rail tank car total containment fire testing: planning & test development T2 - JRC2015 - Joint rail conference (Proceedings) N2 - Given the frequent incidences of Non-Accident Releases (NARs) of hazardous materials from tank cars, there in an increasing interest in transporting hazardous materials in total containment conditions (i.e., no pressure relief devices). However, the ability of tank cars to meet thermal protection requirements provided in the Code of Federal Regulations under conditions of total containment has not been established. Also, the modeling tool commonly used by industry to evaluate thermal protection, AFFTAC, has not been validated under these conditions. The intent of this effort was to evaluate through a series of third-scale fire tests, the ability of tank cars to meet the thermal protection requirements under total containment conditions, and also, to validate AFFTAC for such conditions. This paper describes the test design and planning effort associated with this research, including the design and evaluation of a fire test setup to simulate a credible, fully engulfing, pool fire that is consistent and repeatable, and the design and hydro-static testing of a third-scale tank specimen. The fire design includes controls on the spatial distribution and temperature variation of the flame temperature, the heat flux, and the radiative balance, to best reflect large liquid hydrocarbon pool fire conditions that may be experienced during derailment scenarios. T2 - JRC2015 - Joint rail conference CY - San Jose, CA, USA DA - 23.03.2015 PY - 2015 SP - 5764, 1 EP - 6 AN - OPUS4-32985 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Romero-Navarrete, José A. A1 - Otremba, Frank A1 - Sklorz, Christian A1 - Martínez Madrid, M. T1 - Quasistatic rollover threshold of atmospheric road tankers T2 - CONiiN XVI International Engineering Congress N2 - Several geometrical analytical tools can be used for assessing the potential benefits of any alternative tank shape. The quasistatic evaluation of the cargo-vehicle behavior represents a fast way to objectively determine the roll stability benefits of any potentially new tank shape. In this paper, the geometrical, quasistatic rollover performance of a convex bottom tank shape is compared with that of standard tank shapes, finding that in spite of the lower position of the cargo´s center of gravity in such a tank shape for the un-perturbed condition, it has the same performance as the elliptical tank shape when subjected to Steady lateral acceleration. That as a result of the large cargo´s lateral displacement. Consequently, the combination of a lower center of gravity for the cargo when it is not perturbed, and a Minimum lateral shift due to lateral accelerations inputs, define the conditions for an ideal tank shape. T2 - CONIIN 2020 CY - Online meeting DA - 28.09.2020 KW - Tank shape KW - Road tankers KW - Center of gravity shifting KW - Quasistatic KW - Convex bottom KW - Geometrical analysis PY - 2020 SP - 1 EP - 6 AN - OPUS4-51388 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zur, Malte A1 - Klippel, Alexander A1 - Otremba, Frank A1 - Leder, A. T1 - Numerical simulation and experimental study of cabin-airflow and transport of gas-mixtures in aircraft cargo compartments: model validation T2 - ASME 2013 Fluids engineering summer meeting - 7th International symposium on flow applications in aerospace (Proceedings) N2 - Dangerous goods are transported as air freight in commercial aircrafts. Using plastic jerrycans or plastic containers, liquids or gases can escape by leakage or permeation effects. Prior research by the German Federal Institute for Materials Research and Testing (BAM) showed that the lower explosion limit can be reached when transporting dangerous goods in sea-freight containers under normal transportation situations. This motivated the presented study of the transportation situation of dangerous goods in cargo compartments of commercial airplanes. The scope of this paper is to present the experimental method used for validating a numerical model for CFD (Computational Fluid Dynamics) simulations. The CFD model will be used in a future study to evaluate the potential risk from transporting dangerous goods. The objective of this paper is to present the model mock-up of an aircraft cargo compartment and some examples of three dimensional velocity profiles of the air flow in the mock-up. The velocity profiles are calculated using numerical simulations and measured by Laser-Doppler-Anemometry (LDA) experiments. The mock-up is a generic model of a wide-body aircraft lower deck cargo compartment in a 1:10 scale. Geometry, air exchange rates and inlet as well as outlet flow conditions in the cargo compartment are modeled using realistic boundary conditions. The commercial CFD (Computational Fluid Dynamics) code ANSYS CFX 14 is used for numerical flow simulations applying RANS (Reynolds-Averaged-Navier-Stokes) equations and turbulence models. The turbulence models studied are the renormalization group k-ε-model (RNG), the Reynolds-Stress model by Launder, Reece and Rodi (LRR) and the SST-k-ω-model by Menter (SST). The flow measurement with LDA in the mock-up of a cargo compartment proves to be a feasible method for producing data to validate CFD simulations. Qualitative evaluation of the results shows a good overall agreement between numerical and experimental results. The experimental validation indicates that the implemented CFD model is capable of reproducing the flow situation in the model mock-up. T2 - ASME 2013 Fluids engineering summer meeting - 7th International symposium on flow applications in aerospace CY - Incline Village, Nevada, USA DA - 07.07.2013 KW - Computational fluid dynamics KW - Aircraft cabin air flow KW - Gas mixtures KW - Model validation PY - 2013 SN - 978-0-7918-5555-3 IS - Paper FEDSM2013-16622 SP - 1 EP - 9 AN - OPUS4-30076 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -