Investigation at Mach number 1.91 of side and base pressure distributions over conical boattails without and with jet flow issuing from base

One of 5,164 reports in the series: NACA Research Memorandums available on this site.

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Description

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 ... continued below

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Cortright, Edgar M., Jr. & Schroeder, Albert H. September 12, 1951.

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This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and one other and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 46 times . More information about this report can be viewed below.

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  • Main Title: Investigation at Mach number 1.91 of side and base pressure distributions over conical boattails without and with jet flow issuing from base
  • Series Title: NACA Research Memorandums

Description

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.

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  • : 93R16014
  • URL: http://hdl.handle.net/2060/19930086724 External Link
  • Report No.: NACA-RM-E51F26
  • Center for AeroSpace Information Number: 19930086724
  • Archival Resource Key: ark:/67531/metadc58912

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National Advisory Committee for Aeronautics Collection

The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA).

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  • September 12, 1951

Added to The UNT Digital Library

  • Nov. 16, 2011, 7:33 a.m.

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  • Jan. 30, 2017, 1:35 p.m.

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Cortright, Edgar M., Jr. & Schroeder, Albert H. Investigation at Mach number 1.91 of side and base pressure distributions over conical boattails without and with jet flow issuing from base, report, September 12, 1951; (digital.library.unt.edu/ark:/67531/metadc58912/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.