METHOD OF MAKING HIGH-ENTHALPY GAS JET BASED ON PULSED GAS DISCHARGE Russian patent published in 2009 - IPC H05H1/24 F02P9/00 

FIELD: physics.

SUBSTANCE: present invention pertains to plasma technology and can be used for igniting and intensifying chemical processes in a working mixture in any type of internal combustion engine. The method of making a high-enthalpy gas jet involves putting the working gas into a discharge gap and stimulating a pulsed gas discharge with nanosecond duration, by applying high voltage pulses to the electrodes of the discharge gap. Discharge takes place when there is excess voltage (2-10 times). The amplitude U [V], rise time of the pulse-leading edge τ_e [s] and pulse duration t _pulse [s] are determined from the expression: 3·10^-14>U/(L×n)>10^-15, RC>τ_e<10^-23×L²×n/U, 4·10⁷/n<τ_pulse<10¹¹LR/n, and pulse recurrence frequency f, [s^-1] lies in the range (τ_pulse)^-1 >f>V/L, where L is the distance between electrodes [cm], n is concentration of molecules in unit volume of the discharge section [cm^-3], R is the resistance of the supply line [ Ω], C is the capacitance of the discharge gap [F], and V is the speed of gas in the discharge gap [cm/s]. The temperature of the plasma jet is regulated by varying the pulse frequency in a given range.

EFFECT: increased efficiency of transferring energy from external electrical circuit to gas, optimum homogeneity of the space filled with plasma and higher degree of dissociation of gas in discharge.

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