| 摘要 |
PURPOSE:To enable oscillation to be securely produced, by causing an adhesion phenomenon of jet flow on the jet outlet side wall parts on the downstream side of a vortex chamber. CONSTITUTION:Gas introducing ports 10, 11 are provided in upper and lower vortex chambers 8, 9, and the downstream end of these chambers is made to be a throttle part 12. And, on both sides situated on the downstream side of the throttle part 12, side walls 13, 14 are provided, and at the downstream open end of the side walls 13, 14, a jet port 15 is formed. Further, the side walls 13, 14 are arranged so as to have some amount of setback 16, 17 to the throttle part 12, facilitating the occurrence of low-pressure vortexes between the side walls 13, 14 and jet flow. By this constitution, the deviation of flow becomes very strong, thus the oscillation can be securely produced.
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