The facility BS-II is a spherical vessel of 56 liters with 4 optical access quartz windows. It is dedicated to the study of laminar flame properties. The central ignition system can be spark based using 2 tungsten electrodes or laser based using an Nd-YAG laser. High frequency pressure transducer and high-speed imaging are used to monitor the combustion overpressure if any. A gas chromatographer is used to analyze the gaseous reactants and products.

Dimensions :

  • Inner diameter: 473 mm
  • Internal volume: 56 L
  • Optical windows diameter: 100 mm

Pressure / Temperature :

  • 50 bar / 250°C

Operations at this facility began in 2008 for various research projects such as laminar flames, impact of spray, dilution, temperature and pressure on the laminar flame speed and flammability limits.

Related publications :
– A. Comandini, N. Chaumeix, J. D. Maclean, G. Ciccarelli (2019). Combustion properties of n-heptane/hydrogen mixtures, International Journal of Hydrogen Energy, 44 (3), 2039-2052,
– J. Beeckmann, R. Hesse, J. Schaback, H. Pitsch, Emilien Varea, N. Chaumeix (2019). Flame Propagation Speed and Markstein Length of Spherically Expanding Flames – Assessment of Extrapolation and Measurement Techniques, Proceedings of the Combustion Institute, 37 (2), 1521-1528,
– R. Grosseuvres, A. Comandini, A. Bentaib, N. Chaumeix (2019). Combustion properties of H2/N2/O2/steam mixtures, Proceedings of the Combustion Institute, 37 (2), 1537-1546,
– A. Comandini, G. Pengloan, S. Abid, N. Chaumeix (2016). “Experimental and modeling study of styrene oxidation in spherical reactor and shock tube”, Combustion and Flame, 173, 425-440.
– D. Nativel, M. Pelucchi, A. Frassoldati, A. Comandini, A. Cuoci, E. Ranzi, N. Chaumeix, T. Faravelli (2016). Laminar flame speeds of pentanol isomers: An experimental and modeling study. Combustion and Flame 166, 1-18,