The present invention discloses a gas-liquid two-phase mixed low-temperature
nitrogen gas
jet flow generation apparatus, which comprises a self-pressurization
liquid nitrogen supply
system, a high-pressure-resistant low-temperature soft
pipe, a reciprocating low-temperature pressurization pump, a room-temperature
nitrogen gas supply system, a high-pressure-resistant room-temperature soft
pipe, an inner
mixing chamber, an interception valve, a three-way valve and a spraying
nozzle, wherein the self-pressurization
liquid nitrogen supply
system outputs low-pressure
liquid nitrogen, the low-pressure liquid
nitrogen is pressurized through the reciprocating low-temperature pressurization pump, the obtained high-pressure liquid nitrogen is output to the inner
mixing chamber, the room-temperature
nitrogen gas supply system outputs room-temperature and high-pressure
nitrogen gas and conveys the high-pressure
nitrogen gas to the inner
mixing chamber, the high-pressure liquid nitrogen and the room-temperature and high-pressure nitrogen gas form low-temperature nitrogen gas in the inner mixing chamber, and the low-temperature nitrogen gas is conveyed to the three-way valve and the spraying
nozzle to form the low-temperature nitrogen gas
jet flow. According to the present invention, the flow rates and the ratio of the low-temperature liquid nitrogen and the room-temperature nitrogen gas are controlled, such that the adjustable low-temperature nitrogen gas
jet flow temperature from the
room temperature to -196 DEG C can be achieved, and the jet flow pressure and the jet flow rate can be adjusted.