An Experimental Investigation of Sting-Support Effects on Drag and a Comparison with Jet Effects at Transonic Speeds

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Description

This paper presents the results of an investigation of sting-support interference on afterbody drag at transonic speeds. Stings with varying diameter, cone angle, and cylindrical length were tested at the rear of a model with various afterbody shapes. The data were obtained at an angle of attack of O deg. and at Mach numbers from 0.80 to 1.10. It was found that, in general, the addition of a sting caused a drag reduction. A method is presented whereby approximate sting-interference corrections may be made to models with afterbodies and sting supports of similar size and scale to those of this ... continued below

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Cahn, Maurice S. September 24, 1956.

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  • Main Title: An Experimental Investigation of Sting-Support Effects on Drag and a Comparison with Jet Effects at Transonic Speeds
  • Series Title: NACA Research Memorandums

Description

This paper presents the results of an investigation of sting-support
interference on afterbody drag at transonic speeds. Stings with varying
diameter, cone angle, and cylindrical length were tested at the rear of a
model with various afterbody shapes. The data were obtained at an angle
of attack of O deg. and at Mach numbers from 0.80 to 1.10. It was found that,
in general, the addition of a sting caused a drag reduction. A method is
presented whereby approximate sting-interference corrections may be made
to models with afterbodies and sting supports of similar size and scale to
those of this paper provided the boundary layer is turbulent at the model
base and the Reynolds numbers are of the same order of magnitude.
Reynolds number of the tests presented varied from 15.0 x 10 (exp 6) to 17.4 x 10 (exp 6)
based on body length.
Sting effects from this investigation are compared with data of jet
effects on the same afterbodies. The results of this comparison indicate
that for the more gradually contoured afterbodies, a sting shape can be
found which will duplicate the jet effects, but that for blunt afterbodies
no solid sting shape will duplicate the jet effects.

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  • URL: http://hdl.handle.net/2060/20090024828 External Link
  • Report No.: NACA-RM-L56F18a
  • Center for AeroSpace Information Number: 20090024828
  • Archival Resource Key: ark:/67531/metadc65386

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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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This selection of materials from the Technical Report Archive and Image Library (TRAIL) includes hard-to-find reports published by various government agencies. The technical publications contain reports, images, and technical descriptions of research performed for U.S. government agencies. Topics range from mining, desalination, and radiation to broader physics, biology, and chemistry studies. Some reports include maps, foldouts, blueprints, and other oversize materials.

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Creation Date

  • September 24, 1956

Added to The UNT Digital Library

  • Nov. 17, 2011, 5:13 p.m.

Description Last Updated

  • Jan. 30, 2017, 2:42 p.m.

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Cahn, Maurice S. An Experimental Investigation of Sting-Support Effects on Drag and a Comparison with Jet Effects at Transonic Speeds, report, September 24, 1956; (digital.library.unt.edu/ark:/67531/metadc65386/: accessed April 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.