Small-scale noise tests of a slot nozzle with V-gutter target thrust reverser
- Gutierrez, O. A.
- Apr 1, 1973.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Stone, J. R.
- hdl.handle.net , Connect to this object online.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
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- The noise generated by a 2.26- by 11.43-cm slot nozzle with a V-gutter reverser, as well as some aerodynamic data on flow, thrust-reversal efficiency, and nozzle jet velocity decay were studied. The experimental data are scaled up to sizes suitable for reversing the wing flow of a 45/400-kg augmentor-wing-type STOL airplane, yielding perceived noise levels well above the 95-PNdb design goal on the 152-m sideline. The reverser, in addition to being noisier than the nozzle alone, also had a more uniform directional distribution and more high frequency noise. The maximum overall sound pressure level and the effective sound power level both varied with the sixth power of nozzle jet velocity. Preliminary experiments indicated possible sideline noise reduction by shielding.
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19730012345.
Accession ID: 73N21072.
- No Copyright.
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