Experimental investigation of a two-dimensional split-wing ram-jet inlet at Mach number of 3.85

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Performance characteristics of a two-dimensional isentropic diffuser have been experimentally determined at a Mach number of 3.85. At zero angle of attack, a maximum total-pressure recovery of 0.41 was obtained with a supercritical mass-flow ratio of 0.95. As a consequence of the twin-duct arrangement of the diffuser, a large discontinuity in pressure recovery and mass flow with a characteristic hysteresis was encountered between critical and subcritical operation. An asymmetric shock pattern with large-scale separation and flow reversal in one of the passages occurred at reduced mass flows. Pressure and force data presented for an angle-of-attack range from zero to 4 ... continued below

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28 p. : ill.

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Connors, James F. & Woollett, Richard R. August 11, 1952.

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  • Main Title: Experimental investigation of a two-dimensional split-wing ram-jet inlet at Mach number of 3.85
  • Series Title: NACA Research Memorandums

Description

Performance characteristics of a two-dimensional isentropic diffuser have been experimentally determined at a Mach number of 3.85. At zero angle of attack, a maximum total-pressure recovery of 0.41 was obtained with a supercritical mass-flow ratio of 0.95. As a consequence of the twin-duct arrangement of the diffuser, a large discontinuity in pressure recovery and mass flow with a characteristic hysteresis was encountered between critical and subcritical operation. An asymmetric shock pattern with large-scale separation and flow reversal in one of the passages occurred at reduced mass flows. Pressure and force data presented for an angle-of-attack range from zero to 4 degrees.

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28 p. : ill.

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  • Accession or Local Control No: 93R16525
  • URL: http://hdl.handle.net/2060/19930087235 External Link
  • Report No.: NACA-RM-E52F04
  • Center for AeroSpace Information Number: 19930087235
  • Archival Resource Key: ark:/67531/metadc59338

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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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  • August 11, 1952

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  • Nov. 17, 2011, 10:13 p.m.

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  • April 9, 2018, 5:41 p.m.

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Connors, James F. & Woollett, Richard R. Experimental investigation of a two-dimensional split-wing ram-jet inlet at Mach number of 3.85, report, August 11, 1952; (digital.library.unt.edu/ark:/67531/metadc59338/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.