Advanced MHD assisted mixing of reacting streams

Gas dynamics of the pulsed electric arc in the transversal magnetic field

“…The whole domain can be artificially separated into the conductive channel where heat release and forcing terms are present, and non-conductive external gas. Even such a simplified analysis demonstrates that a nonuniform distribution of ponderomotive force leads to formation of a pair of vortices in the conductive region [5,28,29]. The mechanism of these vortices formation is as follows.…”

“…The mechanical obstacles usually used for vortex generation [2,3] display an optimal performance only in a predesigned range of operational parameters. As an alternative, the fluidic and plasma-based vortex generators are widely studied for the mixing enhancement both in concentration gradient regions [4,5] and boundary layers [6][7][8][9][10][11][12][13][14]. Several concepts were proposed in literature for the large-scale vortices generation by gas discharges.…”

“…Ampere force density, attainable at the typical magnetic field of 1T, can be as high as 10 7 -10 8 N m −3 , that surpasses the corresponding value for EHD interaction in DBD actuators. Intense gasdynamic perturbations, induced during MHD interaction, have already inspired the discussion of the applicability of this technique for mixing enhancement in plasma chemistry and ignition of combustible mixtures [5,20], as well as for the boundary layer control [21]. These applications assume the enhancement of the kinematic transport in the discharge-induced vortices, therefore, they require the understanding of the physical mechanisms responsible for the development of the flow in the region surrounding the arc and the evolution of the disturbances after electric current termination.…”

Preliminary Experimental Research on MHD Assisted Mixing and Combustion

“…It is obvious that the better (faster) mixing is the higher combustion efficiency can be reached in similar conditions [2]. However, the mixing process is generally speaking very slow process in scale of available mixing time, which is limited by residence time in combustion zone [3].…”

Трехмерная Структура Течения В Окрестности Импульсного Поверхностного Дугового Разряда В Магнитном Поле

“…Существующая литература по структуре течения в окрестности дуги посвящена стабилизированным (между силой Ампера и силой аэродинамического сопротивления) дугам, для которых расчеты принципиальной структуры течения [8,9] проведены еще в 80-х годах прошлого века. Известно, что благодаря тому, что сила Ампера не потенциальна, на границе проводящей области формируется пара вихрей [8,10]. Обтекание этой замкнутой циркуляционной области вместе с каналом дуги приводит к возникновению резкой границы между набегающим потоком и нагретым газом [9] и позволяет использовать " аэродинамические" модели дугового канала [11].…”