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NACA-TN-1709
Investigation of the effects of a nacelle on the aerodynamic characteristics of a swept wing and the effects of sweep on a wing alone
Year: 1948
Abstract: An investigation was conducted to determine the effects of a nacelle on the aerodynamic characteristics of a swept wing and the effects of sweep on a wing alone. The aerodynamic characteristics were determined from force and pressure measurements and tuft studies at Mach numbers of 0.13 to 0.61 for the wing-nacelle combination and at 0.13 to 0.70 for the wing alone. The angle of attack was varied from 0° to the stalling angle sat a Mach numbered 0.13 and from -1.65°to 6° at the higher Mach numbers.
The results showed that the measured variation of lift-curve slope with sweep angle is in good agreement with theory up to 30° sweep, but at greater sweep angles the theory apparently underestimates the effects of sweep. The presence of the nacelle increased the lift-curve slope about 10 percent with the wing at 45° sweep but decreased the slope slightly at -45° sweep. The nacelle had no effect on the lift-curve slope of the unswept wing. The present of the nacelle did not appreciably alter the stalling characteristics of the wing at sweep angles of 45° but for the unswept wing the addition of the nacelle caused an appreciable reduction in the maximum lift coefficient and in the angle of attack at maximum lift.
The results showed that the measured variation of lift-curve slope with sweep angle is in good agreement with theory up to 30° sweep, but at greater sweep angles the theory apparently underestimates the effects of sweep. The presence of the nacelle increased the lift-curve slope about 10 percent with the wing at 45° sweep but decreased the slope slightly at -45° sweep. The nacelle had no effect on the lift-curve slope of the unswept wing. The present of the nacelle did not appreciably alter the stalling characteristics of the wing at sweep angles of 45° but for the unswept wing the addition of the nacelle caused an appreciable reduction in the maximum lift coefficient and in the angle of attack at maximum lift.
Subject: AIR
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:06:02Z | |
| date available | 2017-09-04T15:06:02Z | |
| date copyright | 01/01/1948 | |
| date issued | 1948 | |
| identifier other | LDPTYDAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/3511 | |
| description abstract | An investigation was conducted to determine the effects of a nacelle on the aerodynamic characteristics of a swept wing and the effects of sweep on a wing alone. The aerodynamic characteristics were determined from force and pressure measurements and tuft studies at Mach numbers of 0.13 to 0.61 for the wing-nacelle combination and at 0.13 to 0.70 for the wing alone. The angle of attack was varied from 0° to the stalling angle sat a Mach numbered 0.13 and from -1.65°to 6° at the higher Mach numbers. The results showed that the measured variation of lift-curve slope with sweep angle is in good agreement with theory up to 30° sweep, but at greater sweep angles the theory apparently underestimates the effects of sweep. The presence of the nacelle increased the lift-curve slope about 10 percent with the wing at 45° sweep but decreased the slope slightly at -45° sweep. The nacelle had no effect on the lift-curve slope of the unswept wing. The present of the nacelle did not appreciably alter the stalling characteristics of the wing at sweep angles of 45° but for the unswept wing the addition of the nacelle caused an appreciable reduction in the maximum lift coefficient and in the angle of attack at maximum lift. | |
| language | English | |
| title | NACA-TN-1709 | num |
| title | Investigation of the effects of a nacelle on the aerodynamic characteristics of a swept wing and the effects of sweep on a wing alone | en |
| type | standard | |
| page | 109 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1948 | |
| contenttype | fulltext | |
| subject keywords | AIR | |
| subject keywords | AIRFOILS | |
| subject keywords | CHARACTERISTICS | |
| subject keywords | COMBINATIONS | |
| subject keywords | DISTRIBUTION | |
| subject keywords | DRAG | |
| subject keywords | FLOW | |
| subject keywords | HIGH | |
| subject keywords | LOW | |
| subject keywords | NACA | |
| subject keywords | NACELLE | |
| subject keywords | PRESSURE | |
| subject keywords | SPEED | |
| subject keywords | STABILITY | |
| subject keywords | SWEPTBACK | |
| subject keywords | SWEPTFORWARD | |
| subject keywords | TESTS | |
| subject keywords | TUNNEL | |
| subject keywords | VISUALIZATION | |
| subject keywords | WIND | |
| subject keywords | WING | |
| subject keywords | WINGS |