Zobrazeno 1 - 10
of 56
pro vyhledávání: '"M, Heitsch"'
Autor:
Pietro Moretto, M. Heitsch, M. Cristina Galassi, Beatriz Acosta Iborra, Daniele Baraldi, E. Papanikolaou
Publikováno v:
International Journal of Hydrogen Energy. 39:6252-6260
High injection pressures are used during the re-fueling process of vehicle tanks with compressed hydrogen, and consequently high temperatures are generated in the tank, potentially jeopardizing the system safety. Computational Fluid Dynamics (CFD) to
Publikováno v:
International Journal of Hydrogen Energy. 36:2606-2612
High-pressure storage of hydrogen in tanks is a promising option to provide the necessary fuel for transportation purposes. The fill process of a high-pressure tank should be reasonably short but must be designed to avoid too high temperatures in the
Publikováno v:
Nuclear Engineering and Design. 240:2176-2184
The validation of a CFD code for light-water reactor containment applications requires among others the presence of steam in the different flow types like jets or buoyant plumes and leads to the need to simulate condensation phenomena. In this contex
Autor:
F. Verbecke, Daniele Baraldi, M. Heitsch, Dmitriy Makarov, A.A. Efimenko, A. Gavrikov, A. Lelyakin, Vladimir Molkov, J. Yanez, Alexei Kotchourko
Publikováno v:
International Journal of Hydrogen Energy. 35:5754-5762
The paper describes an exercise on comparison of Computational Fluid Dynamics (CFD) models to predict deflagrations of a lean uniform hydrogen–air mixture and a mixture with hydrogen concentration gradient. The exercise was conducted within the wor
Publikováno v:
International Journal of Hydrogen Energy. 35:4409-4419
In a hydrogen laboratory hydrogen may accidentally leak from the high pressure systems and it may form a flammable mixture after mixing with air. CFD (Computational Fluid Dynamics) simulations of accidental hydrogen releases in a laboratory are perfo
Publikováno v:
Heitsch, M, Huhtanen, R, Techy, Z, Fry, C, Kostka, P, Niemi, J & Schramm, B 2010, ' CFD evaluation of hydrogen risk mitigation measures in a VVER-440/213 containment ', Nuclear Engineering and Design, vol. 240, no. 2, pp. 385-396 . https://doi.org/10.1016/j.nucengdes.2008.07.022
In the PHARE project “Hydrogen Management for the VVER440/213” (HU2002/000-632-04-01), CFD (Computational Fluid Dynamics) calculations using GASFLOW, FLUENT and CFX were performed for the Paks NPP (Nuclear Power Plant), modelling a defined severe
Publikováno v:
Journal of Loss Prevention in the Process Industries. 22:303-315
Computational Fluid Dynamics (CFD) simulations of hydrogen dispersion and combustion in accident scenarios in a mock-up liquid hydrogen (LH2) refuelling station have been performed with the codes ADREA-HF and REACFLOW. The assumed accident scenarios
Autor:
J. Yanez, S. Ledin, M. Skotenne, Olav R. Hansen, M. Heitsch, A.A. Efimenko, Dmitriy Makarov, Prankul Middha, O. Roe, A. Lelyakin, A. Gavrikov, Vladimir Molkov, F. Verbecke, Alexei Kotchourko, Daniele Baraldi
Publikováno v:
International Journal of Hydrogen Energy. 34:2800-2814
The paper describes the comparison of simulations of a hydrogen explosion experiment in an environment simulating a vehicle refuelling station. The exercise was performed in 2007 within the European Commission-funded Network of Excellence ``Hydrogen
Publikováno v:
Nuclear Engineering and Design. 238:618-626
In this validation work two turbulence models (k–ɛ and SST model) and two grids (a finer hybrid grid and a tetrahedral coarser grid) are considered in order to model helium release and dispersion. Simulation results are compared against an experim
Autor:
M. Heitsch, K. Haller, H. Paillere, J. Schmid, B. Hemström, I. Toth, J. Macek, Michele Andreani, Ismo Karppinen
Publikováno v:
Andreani, M, Haller, K, Heitsch, M, Hemström, B, Karppinen, I, Macek, J, Schmid, J, Paillere, H & Toth, I 2008, ' A benchmark exercise on the use of CFD codes for containment issues using best practice guidelines : A computational challenge ', Nuclear Engineering and Design, vol. 238, no. 3, pp. 502-513 . https://doi.org/10.1016/j.nucengdes.2007.01.021
In the framework of the 5th EU-FWP project ECORA the capabilities of CFD software packages for simulating flows in the containment of nuclear reactors was evaluated. Four codes were assessed using two basic tests in the PANDA facility addressing the