Gas Explosions and Technical Safety
We focus on experimental and numerical investigation of pre-mixed combustion, dispersion, ignition, explosions and shock waves in various types of processes, equipments and systems.
Main R&D Activities
Main research and development activities include:
- Flame propagation in homogeneous and inhomogeneous fuel-air mixtures
- DDT / Transition to detonations
- Hydrogen safety
- CO2 BLEVE (Boiling liquid expanding vapour explosion)
- Dispersion and ignition of gas clouds
- Shock waves from various types of explosions
- Supersonic compressible flow
- High speed filming and digital image processing
- Accident investigation
- Development of test methods, models and software
- Experimental and engineering support to industrial development programs
We have a flexible and well equipped laboratory at the university college.
- 16 channel high speed logging (100 MS/s)
- 2 Photron high speed video cameras (APX RS-BW and SA1-color)
- Various Kistler and Kulite pressure transducers
- Schlieren with PalFlash 501
Field test capability in cooperation with Norward (Rafnes) and Norwegian Defences Estate Agency. Our laboratory equipment is mobile and we are capable of setting up and running field tests with pressure measurements and high speed filming in one day.
Our work on development of models and software for compressible reactive flows are based on using Matlab:
- FLIC – Large Eddy Simulation
- RCM (Random Choice Method)
- BOS (Background Oriented Schlieren)
- Parallel Processing
Statoil, Norsk Hydro, Norcem, Borealis, Ineos, Norward, DnV, CMR-GexCon, Østfold Energy, Miljøbil Grenland, Tel-Tek, IEA-HIA-Task 19, and Norwegian Defence Estates Agency.
- Lars-André Tokheim, "The Impact of Staged Combustion on the Operation of a Precalciner Cement Kiln" Telemark University College – NTNU, 20 Oct 1999
- Ernst Petter Axelsen, "Teoretiske og eksperimentelle studier av forbrenning av alternative brensel i sementovner", Telemark University College – NTNU, 31 Oct 2002
- Kjetil Kristoffersen, "Gas explosions in process pipes", Telemark University College – NTNU 2004:79
- Vegeir Knudsen, "Hydrogen gas explosions in pipelines – Modeling and experimental investigations", Telemark University College – NTNU, 2007:14
- Knut Vågsæther, "Modelling of gas explosions", Telemark University College – NTNU, 2010:221
- Bjerketvedt, D., I. O. Moen, and O. K. Sonju. 1985. The influence of experimental condition on the reinitiation of detonation across an inert region. Progress in Astronautics and Aeronautics 106:109–30.
- Bjerketvedt, D., J. R. Bakke, and van Wingerden, K. 1997. Gas explosion handbook. Journal of Hazardous Materials 52(1(special issue)):1–150. ISSN 0304-3894
Sommersel O. K., Bjerketvedt, D. Christensen, S. O. Krest, O. Vaagsaether, K.
“Application of background oriented schlieren (BOS) for quantitative measurements of shock waves from explosions” Shock Waves, Volume 18, Number 4 / September, 2008
- Sommersel, O. K., Bjerketvedt, D., Vaagsaether, K., and Fannelop, T.K., Experiments with release and ignition of hydrogen Gas in a 3 m long channel, International Journal of Hydrogen Energy, Volume: 34 Issue: 14 Special Issue: Sp. Iss. SI Pages: 5869-5874, July, 2009
Prof. Dag Bjerketvedt
Faculty of Technology