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NACA-TN-2972
Theoretical pressure distributions and wave drags for conical boattails
Year: 1953
Abstract: Afterbody pressure distributions and wave drag were calculated using a second-order theory for a variety of conical boattails at zero angle of attack. Results are presented for Mach numbers from 1.5 to 4.5, area ratios from 0.200 to 0.800, and boattail angle from 3 degrees to 11 degrees. The results indicate that for a given boattail angle, the wave drag decreases with increasing Mach number and area ratio. The wave drag, for a constant area ratio, increases with increasing boattail angle. For a specific Mach number, area ratio, and fineness ratio, a comparison of the wave-drag coefficients for conical, tangent-parabolic, and secant-parabolic boattails showed the conical boattail to have the smallest wave drag.
Subject: AERODYNAMIC
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:29:04Z | |
| date available | 2017-09-04T18:29:04Z | |
| date copyright | 01/01/1953 | |
| date issued | 1953 | |
| identifier other | ISNUYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=autho1216AF679D/handle/yse/211289 | |
| description abstract | Afterbody pressure distributions and wave drag were calculated using a second-order theory for a variety of conical boattails at zero angle of attack. Results are presented for Mach numbers from 1.5 to 4.5, area ratios from 0.200 to 0.800, and boattail angle from 3 degrees to 11 degrees. The results indicate that for a given boattail angle, the wave drag decreases with increasing Mach number and area ratio. The wave drag, for a constant area ratio, increases with increasing boattail angle. For a specific Mach number, area ratio, and fineness ratio, a comparison of the wave-drag coefficients for conical, tangent-parabolic, and secant-parabolic boattails showed the conical boattail to have the smallest wave drag. | |
| language | English | |
| title | NACA-TN-2972 | num |
| title | Theoretical pressure distributions and wave drags for conical boattails | en |
| type | standard | |
| page | 15 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1953 | |
| contenttype | fulltext | |
| subject keywords | AERODYNAMIC | |
| subject keywords | AFTERBODIES | |
| subject keywords | ANGLE | |
| subject keywords | ATTACK | |
| subject keywords | BOATTAILS | |
| subject keywords | BODIES | |
| subject keywords | COMPUTATION | |
| subject keywords | CONICAL | |
| subject keywords | DISTRIBUTION | |
| subject keywords | DRAG | |
| subject keywords | DUCTED | |
| subject keywords | FINENESS | |
| subject keywords | LOADS | |
| subject keywords | MACH | |
| subject keywords | NUMBER | |
| subject keywords | PRESSURE | |
| subject keywords | RATIO | |
| subject keywords | REDUCTION | |
| subject keywords | WAVE | |
| subject keywords | ZERO |