| 摘要 |
A relatively efficient snowmaking gun which is of the compressed air and water type includes a water tube (5) for receiving water from a source thereof under pressure and discharging the water in an annular diverging stream through an adjustable valve (71, 78) and a turbine (8) which chops the water into fine droplets; and a central nucleator (3, 4) for receiving compressed air from a source thereof and for producing a central stream of fine ice particles downstream of the discharge end of the gun for mixing with the water to produce snow, temperature permitting. A preferred form of nucleator (3, 4) is an ultrasonic resonator for receiving air and water from sources thereof under pressure to produce an annular central stream of fine water droplets in air while creating ultrasonic waves downstream of the gun outlet. The gun can also include a casing defined by inner (9) and outer shells (10) surrounding the water tube (5) and forming an air chamber (145) which receives compressed air for discharge through a plurality of spaced apart nozzles (11). The air from the nozzles (11) forms an annular diverging stream of air for mixing with the water from the water tube (5) and the fine droplets or nuclei produced by the central nucleator or resonator (3, 4).
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