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NACA-TN-2957
Surveys of the flow fields at the propeller planes of six 40 degree sweptback wing-fuselage-nacelle combinations
Year: 1953
Abstract: The flow fields at the propeller planes of six 40° sweptback semispan wing-fuselage-nacelle combinations were surveyed to provide data to enable the study of the characteristics of the flow fields and their effect on propeller-oscillating aerodynamic loads. The results of the surveys are presented in the form of angles that define the direction of the local velocity relative to the survey disk and as the ratios of the local velocities to free-stream velocity. These parameters are shown as functions of the regular position around the survey disk for given radial positions. Typical propeller-oscillating air loads, computed by the method of NACA TN 2192 using measured flow-field data, are presented to demonstrate the significance of the flow parameters. Also shown are comparisons of measured and predicted upflow angles for all models at a specific angle of attack.
The results of the surveys show that variations of the flow parameters with angular positions are predominantly first-order sinusoidal for the six models tested and, thus, are similar to results for an unswept-wing airplane reported in NACA TN 2192.
The results of the surveys show that variations of the flow parameters with angular positions are predominantly first-order sinusoidal for the six models tested and, thus, are similar to results for an unswept-wing airplane reported in NACA TN 2192.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:29:35Z | |
| date available | 2017-09-04T17:29:35Z | |
| date copyright | 01/01/1953 | |
| date issued | 1953 | |
| identifier other | CSNUYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/152628 | |
| description abstract | The flow fields at the propeller planes of six 40° sweptback semispan wing-fuselage-nacelle combinations were surveyed to provide data to enable the study of the characteristics of the flow fields and their effect on propeller-oscillating aerodynamic loads. The results of the surveys are presented in the form of angles that define the direction of the local velocity relative to the survey disk and as the ratios of the local velocities to free-stream velocity. These parameters are shown as functions of the regular position around the survey disk for given radial positions. Typical propeller-oscillating air loads, computed by the method of NACA TN 2192 using measured flow-field data, are presented to demonstrate the significance of the flow parameters. Also shown are comparisons of measured and predicted upflow angles for all models at a specific angle of attack. The results of the surveys show that variations of the flow parameters with angular positions are predominantly first-order sinusoidal for the six models tested and, thus, are similar to results for an unswept-wing airplane reported in NACA TN 2192. | |
| language | English | |
| title | NACA-TN-2957 | num |
| title | Surveys of the flow fields at the propeller planes of six 40 degree sweptback wing-fuselage-nacelle combinations | en |
| type | standard | |
| page | 58 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1953 | |
| contenttype | fulltext |