Flame ion generation rate as a measure of the flame thermo-acoustic response

Development of a numerical model for the electric current in burner-stabilised methane–air flames

“…It has been noticed that at low applied electric fields the current is an approximately linear function of the applied potential difference, but at a certain external electric field the current does not increase further and the electric field saturates [14,22]. It is furthermore found that the gradient of the electric current in the linear region depends strongly on the polarity of the applied potential [14,22]. Peerlings et al [14] theorizes that this so-called diodic effect is primarily caused by the distance of the electrodes to the burner deck.…”

“…It is furthermore found that the gradient of the electric current in the linear region depends strongly on the polarity of the applied potential [14,22]. Peerlings et al [14] theorizes that this so-called diodic effect is primarily caused by the distance of the electrodes to the burner deck. Papac and Dunn-Rankin [23] investigated the electric current caused by the motion of flame ions numerically, but the movement of electrons was neglected, while the flow of electrons also plays an important role in the total electric current [14].…”

“…The application of these techniques can be used to significantly lower the ignition temperature [8]. Spark ignition has also received a lot of attention in research articles [9][10][11][12][13] and recently a new method has been investigated by Peerlings [14] to quantify a flame's thermo-acoustic behavior by electric current measurements. The electric currents can also be used to determine the flame's equivalence ratio [15].…”

Validation of a novel numerical model for the electric currents in burner-stabilized methane–air flames

“…Papac and Dunn-Rankin [21] numerically computed the electric current, based on the flux of ions. The total current however, is actually primarily caused by the high mobility of electrons [13].…”

“…Starikovskaia [11] presents a comprehensive review on plasma assisted ignition and combustion, which can be used to lower the ignition temperature significantly [12]. Another option pioneered recently is to use electric current measurements, to investigate the thermo-acoustic behavior of flames [13]. This current can also be used as a measure for the equivalence ratio [14].…”