Investigation of Conical Subsonic Diffusers for Ram-Jet Engines

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

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Description

The efficiency of a 30 degree conical diffuser was improved as much as 20 percent and separation was eliminated by the use of vortex generators. The use of splitter cones gave only small efficiency gains, but relatively uniform diffuser-outlet velocity profiles were obtained with the better designs. A configuration which incorporated both vortex generators and a splitter cone gave efficiencies higher than those obtained with any other splitter-cone configuration and also higher than those obtained when the same vortex generators were used without the splitter cone.

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40 p. : ill.

Creation Information

Farley, John M. & Welna, Henry J. March 15, 1954.

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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 121 times . More information about this report can be viewed below.

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Description

The efficiency of a 30 degree conical diffuser was improved as much as 20 percent and separation was eliminated by the use of vortex generators. The use of splitter cones gave only small efficiency gains, but relatively uniform diffuser-outlet velocity profiles were obtained with the better designs. A configuration which incorporated both vortex generators and a splitter cone gave efficiencies higher than those obtained with any other splitter-cone configuration and also higher than those obtained when the same vortex generators were used without the splitter cone.

Physical Description

40 p. : ill.

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  • Accession or Local Control No: 93R19766
  • URL: http://hdl.handle.net/2060/19930090476 External Link
  • Report No.: NACA-RM-E53L15
  • Center for AeroSpace Information Number: 19930090476
  • Archival Resource Key: ark:/67531/metadc64788

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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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Creation Date

  • March 15, 1954

Added to The UNT Digital Library

  • Nov. 17, 2011, 10:13 p.m.

Description Last Updated

  • Nov. 14, 2018, 9:44 a.m.

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Farley, John M. & Welna, Henry J. Investigation of Conical Subsonic Diffusers for Ram-Jet Engines, report, March 15, 1954; (digital.library.unt.edu/ark:/67531/metadc64788/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.