FIELD: mechanical engineering. SUBSTANCE: in the device nozzle is in the form of a few pneumatic channels with individual gas-powdered mixture feed channels and with common prechamber. The outlets of supersonic parts of the pneumatic channels form plane outlet pneumatic channel with divergence angle of not more than 10 deg and with the width of the exit section equal to the width of each of the channels common for the nozzle unit. The angle of divergence of the supersonic portions of individual channels does not exceed the critical angle determined from the expression αcr. = (M-1). 26.5 deg, where M is the Mach number. EFFECT: extended operating capabilities. 3 dwg
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