درباره ما
NASA-CR-159200
Interior noise control prediction study for high-speed propeller-driven aircraft
Year: 1979
Abstract: An analytical model was developed to predict the noise levels inside propeller-driven aircraft during cruise at M = 0.8. The model was applied to three study aircraft with fuselages of different size (wide body, narrow body and small diameter) in order to determine the noise reductions required to achieve the goal of an A-weighted sound level which does not exceed 80 dB. The model was then used to determine noise control methods which could achieve the required noise reductions. Two classes of noise control treatments were investigated: add-on treatments which can be added to existing structures, and advanced concepts which would require changes to the fuselage primary structure. Only one treatment, a double wall with limp panel, provided the required noise reductions. Weight penalties associated with the treatment were estimated for the three study aircraft.
Subject: AIRCRAFT COMPARTMENTS
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:45:49Z | |
| date available | 2017-09-04T15:45:49Z | |
| date copyright | 01/01/1979 | |
| date issued | 1979 | |
| identifier other | PTHOEEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/48407 | |
| description abstract | An analytical model was developed to predict the noise levels inside propeller-driven aircraft during cruise at M = 0.8. The model was applied to three study aircraft with fuselages of different size (wide body, narrow body and small diameter) in order to determine the noise reductions required to achieve the goal of an A-weighted sound level which does not exceed 80 dB. The model was then used to determine noise control methods which could achieve the required noise reductions. Two classes of noise control treatments were investigated: add-on treatments which can be added to existing structures, and advanced concepts which would require changes to the fuselage primary structure. Only one treatment, a double wall with limp panel, provided the required noise reductions. Weight penalties associated with the treatment were estimated for the three study aircraft. | |
| language | English | |
| title | NASA-CR-159200 | num |
| title | Interior noise control prediction study for high-speed propeller-driven aircraft | en |
| type | standard | |
| page | 316 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1979 | |
| contenttype | fulltext | |
| subject keywords | AIRCRAFT COMPARTMENTS | |
| subject keywords | AIRCRAFT DESIGN | |
| subject keywords | ALUMINUM | |
| subject keywords | COMPOSITE MATERIALS | |
| subject keywords | CYLINDRICAL SHELLS | |
| subject keywords | NOISE PREDICTION (AIRCRAFT) | |
| subject keywords | NOISE REDUCTION | |
| subject keywords | PREDICTION ANALYSIS TECHNIQUES | |
| subject keywords | TRANSMISSION LOSS | |
| subject keywords | WEIGHT (MASS) |