Correlation of turbulent burning velocity and turbulence intensity for starch dust air mixtures

P. Hamberger (1) , Henri Schneider (1) , Didier Jamois (2) , Christophe Proust (2)

1 Fraunhofer ICT - Fraunhofer Institute for Chemical Technology
2 INERIS - Institut National de l'Environnement Industriel et des Risques

Currently dust explosion simulation codes are developed for assisting in a safe design of dust handling facilities. The correlation of turbulent burning velocity with turbulence intensity is important as an input into these codes. In laboratory scale experiments the open tube method was used to measure simultaneously both the turbulence intensity and the flame propagation. To simplify interpretation of the results, direct access to these values is of high significance. Therefore the flame velocity was measured in situ via visualization with a high speed camera while the turbulence intensity was measured during the whole combustion process until the flame arrived at the sensors, which consisted of modified pitot probes. The correlation was found to have the same trend as the the Bray - Gülder model for gases in the investigated range of 0.5m/s < u' < 3m/s with flame speeds of up to 3m/s.

Mots clés: COMBUSTION TURBULENTE; NUAGE DE POUSSIERE; VITESSE DE COMBUSTION; INTENSITE DE TURBULENCE

Domaines: Sciences de l'ingénieur [physics]

P. Hamberger, Henri Schneider, Didier Jamois, Christophe Proust. Correlation of turbulent burning velocity and turbulence intensity for starch dust air mixtures. 3. European combustion Meeting, Apr 2007, Chania, Greece. pp.NC. ⟨ineris-00976293⟩