Characterization of Spark Ignition energy transfer by optical and non-optical diagnostics

Carlos Benito Parejo (1) , Quentin Michalski (1) , Camille Strozzi (1) , Julien Sotton (1) , Marc Bellenoue (1)

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]

This study focuses on the measurement of energy deposited in the fluid by an electrical discharge in different test conditions. An experimental setup is developed for this purpose: a transistorized coil system supplies the electrical energy input for the spark, from 25 to 45 mJ, which is measured at a pair of pin-to-pin electrodes. The energy deposit, ranging from 8 to 15 mJ, is measured using two different techniques: constant volume calorimetry, and Speckle-based Background-Oriented Schlieren (SBOS). Efficiency of the energy transfer is estimated. Calorimetry shows that efficiency depends on inter-electrode gap and gas conditions, increasing with pressure and gap. SBOS provides spatial distributions of density field, temperature and enthalpy. Calorimetry and SBOS provide similar results in terms of the rate of energy deposit over time. Different test conditions are obtained changing inter-electrode gap (from 1 to 3 mm), energy input and gas pressure (from 0.5 to 4 bar).

Mots clés: spark energy measurement

Domaines: Milieux fluides et réactifs

Carlos Benito Parejo, Quentin Michalski, Camille Strozzi, Julien Sotton, Marc Bellenoue. Characterization of Spark Ignition energy transfer by optical and non-optical diagnostics. 8th european combustion meeting, Apr 2017, dubrovnik, Croatia. ⟨hal-01537769⟩