| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise by preventing existence of a bifurcation from influencing on aggravation of the noise. SOLUTION: The jet flow exhaust nozzle 1 has a tube-like partition wall 12, a tube-like casing 11 for covering an outer circumference of the tube-like partition wall 12, the bifurcation 13 extending along an axial direction of the tube-like partition wall 12 and the casing 11 for supporting respective lower stream side end parts of the tube-like partition wall 12 and the casing 11 from outside and inside of the tube-like partition wall 12 is provided as a flow passage in which a high speed core flow and a flow passage for flowing a low speed bypass flow is formed between the tube-like partition wall 12 and the casing 11. A pair of first protrusions 21, 22 wherein one of their ridge lines faces an upper stream side are provided at a position in the downstream side edge part of the tube-like partition wall 12 near the bifurcation 13 and symmetric with respect to the bifurcation 13. COPYRIGHT: (C)2008,JPO&INPIT
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