درباره ما
NACA-RM-L56C21
Jet effects on base and afterbody pressures of a cylindrical afterbody at transonic speeds
Year: 1956
Abstract: An investigation of the effects of jet nozzle geometry, size of base annulus, and base bleed upon the base and afterbody pressures of a cylindrical afterbody at transonic speeds has been conducted. Sonic and supersonic conical nozzles with jet-to-base diameter ratios from 0.25 to 0.85 were investigated with a cold jet at jet total-pressure ratios up to approximately 8.0 through a Mach number range from 0.6 to 1.25. Base pressure coefficients of about -0.55 were measured for the sonic nozzles at a Mach number of 1 or greater. The jet-to-base diameter ratio had a substantial effect on the base pressure obtained on the cylindrical afterbody of this investigation. Base bleed was beneficial in increasing the base pressure under certain conditions but had little or no effect at certain other conditions.
Subject: AERODYNAMIC
Show full item record
| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:03:51Z | |
| date available | 2017-09-04T16:03:51Z | |
| date copyright | 01/01/1956 | |
| date issued | 1956 | |
| identifier other | RRSWXDAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/67173 | |
| description abstract | An investigation of the effects of jet nozzle geometry, size of base annulus, and base bleed upon the base and afterbody pressures of a cylindrical afterbody at transonic speeds has been conducted. Sonic and supersonic conical nozzles with jet-to-base diameter ratios from 0.25 to 0.85 were investigated with a cold jet at jet total-pressure ratios up to approximately 8.0 through a Mach number range from 0.6 to 1.25. Base pressure coefficients of about -0.55 were measured for the sonic nozzles at a Mach number of 1 or greater. The jet-to-base diameter ratio had a substantial effect on the base pressure obtained on the cylindrical afterbody of this investigation. Base bleed was beneficial in increasing the base pressure under certain conditions but had little or no effect at certain other conditions. | |
| language | English | |
| title | NACA-RM-L56C21 | num |
| title | Jet effects on base and afterbody pressures of a cylindrical afterbody at transonic speeds | en |
| type | standard | |
| page | 51 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1956 | |
| contenttype | fulltext | |
| subject keywords | AERODYNAMIC | |
| subject keywords | AFTERBODIES | |
| subject keywords | AIRCRAFT | |
| subject keywords | BASE | |
| subject keywords | BLAST | |
| subject keywords | BODIES | |
| subject keywords | CHARACTERISTICS | |
| subject keywords | CONVERGENT | |
| subject keywords | CYLINDRICAL | |
| subject keywords | EFFECTS | |
| subject keywords | FLOW | |
| subject keywords | GEOMETRY | |
| subject keywords | JET | |
| subject keywords | NOZZLE | |
| subject keywords | NOZZLES | |
| subject keywords | PRESSURE | |
| subject keywords | SONIC | |
| subject keywords | SPEED | |
| subject keywords | SUPERSONIC | |
| subject keywords | TRANSONIC |