| 摘要 |
In order to provide noise suppression, bumps or undulations 40, 140, 240, 340, 540, 640, 740, 840, 940 are provided on a nozzle surface in order to vary the convergent-divergent ratio between that surface and an opposed nozzle surface. By such an approach, a circumferential variation in the shock cell pattern is created and the flow is deflected so as to enhance turbulent mixing thereby suppressing noise. |
