| 摘要 |
PROBLEM TO BE SOLVED: To provide a jet nozzle capable of suppressing the attenuation of the jet stream ejected from a jet orifice to keep the high speed jet stream up to a remoter region. SOLUTION: An inside nozzle 2 for dividing an air stream into inside and outside streams is arranged in a pressure air flow channel 3 and the flow velocity of the outside air stream flowing through the gap between the inside nozzle 2 and an outside nozzle 1 is made higher than the flow velocity of the inside air stream flowing through the inside nozzle 2 and the inside air stream is ejected in the state surrounded by the high speed outside air stream to suppress the attenuation of the jet stream after ejection. The flow channel area of the flow channel on the down stream side of the minimum flow channel part having the minimum flow channel area formed between the outside and inside nozzles 1 and 2 is gradually expanded toward the downstream side to increase the speed of the outside air stream. COPYRIGHT: (C)2003,JPO
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