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NACA-RM-E51F26
Investigation at Mach number 1.91 of side and base pressure distributions over conical boattails without and with jet flow issuing from base
Year: 1951
Abstract: Experimental side and bade pressure distributions over a series of conical boattails without and with jet flow from the base are presented at a Mach number of 1.91. For the case of no jet flow the methods of characteristics and linearized theory are shown to overpredict the side pressure drag. A semi-empirical theory is presented to predict the effect of boattail angle on base pressure. With the boattail extending to a sharp edge at the nozzle exit, the over-pressure jet is shown to decrease the side pressure drag. Presence of an annular base may eliminate the effect of the jet on the side pressure drag, but the jet effect on the base pressure drag may greatly increase or decrease the total boattail drag.
Subject: BODIES
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:48:35Z | |
| date available | 2017-09-04T16:48:35Z | |
| date copyright | 01/01/1951 | |
| date issued | 1951 | |
| identifier other | WIMCWDAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/112013 | |
| description abstract | Experimental side and bade pressure distributions over a series of conical boattails without and with jet flow from the base are presented at a Mach number of 1.91. For the case of no jet flow the methods of characteristics and linearized theory are shown to overpredict the side pressure drag. A semi-empirical theory is presented to predict the effect of boattail angle on base pressure. With the boattail extending to a sharp edge at the nozzle exit, the over-pressure jet is shown to decrease the side pressure drag. Presence of an annular base may eliminate the effect of the jet on the side pressure drag, but the jet effect on the base pressure drag may greatly increase or decrease the total boattail drag. | |
| language | English | |
| title | NACA-RM-E51F26 | num |
| title | Investigation at Mach number 1.91 of side and base pressure distributions over conical boattails without and with jet flow issuing from base | en |
| type | standard | |
| page | 60 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1951 | |
| contenttype | fulltext | |
| subject keywords | BODIES | |
| subject keywords | CANOPIES | |
| subject keywords | EXITS | |
| subject keywords | FLOW | |
| subject keywords | FUSELAGE | |
| subject keywords | INTERFERENCE | |
| subject keywords | JET | |
| subject keywords | LOADS | |
| subject keywords | MISSILES | |
| subject keywords | MIXING | |
| subject keywords | NACELLES | |
| subject keywords | SHAPE | |
| subject keywords | VARIABLES |