| 摘要 |
A sonic jet engine noise suppressor having a relatively short horizontally disposed conduit for reception of exhaust gases from the tail pipe of a jet engine, and for conveying these gases into the side of a tall stack via a perforated conical diffuser. The side walls of the conduit and stack are acoustically treated for sound absorption, and the stack contains a vertical core which is also acoustically treated for sound absorption. The core also contains resonator chambers for attenuation of selected frequency bands. The stack is of a special structure having a perforated tubular liner, sub-divided into a vertical stack of interfitting sections, and provided with flexural supports at the joints of these sections so as to facilitate expansion and contraction with large changes in temperature.
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