| 摘要 |
PROBLEM TO BE SOLVED: To provide a spray nozzle capable of forming extremely fine mist whose particle size distribution is extremely sharp.SOLUTION: A spray nozzle includes: a first stage Laval nozzle 10 having a reduced flow channel 12 accelerating compressed gas supplied from the outside, until reaching sonic speed, an enlarged flow channel 13 accelerating a sonic gas flow introduced from the reduced flow channel 12, to supersonic speed, and a liquid supply channel 14 supplying liquid to a supersonic gas flow in the enlarged flow channel 13; and a second stage Laval nozzle 20 having a reduced flow channel 22 accelerating compressed gas supplied from the outside, until reaching sonic speed, an enlarged flow channel 23 accelerating a sonic gas flow introduced from the reduced flow channel 22, to supersonic speed, and a mist introduction port 24 introducing a mist formed by the first stage Laval nozzle 10, to a supersonic gas flow in the enlarged flow channel 23. |
