Matching of Auxiliary Inlets to Secondary-Air Requirements of Aircraft Ejector Exhaust Nozzles

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

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Description

Report presenting an analysis of the problems associated with matching secondary-air requirements of ejector exhaust nozzles and auxiliary inlets has been made for free-stream Mach numbers up to 2.0. The analysis indicated that inlets located in the free stream supply higher pressure recovery than ejectors generally require for optimum net internal thrust at Mach numbers above about 1.4. Net-thrust gains can be achieved by immersing the auxiliary inlet in a boundary layer where the inlet-momentum penalty is less.

Physical Description

39 p. : ill.

Creation Information

Hearth, Donald P.; Englert, Gerald W. & Kowalski, Kenneth L. August 16, 1955.

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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 146 times , with 11 in the last month . More information about this report can be viewed below.

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  • Main Title: Matching of Auxiliary Inlets to Secondary-Air Requirements of Aircraft Ejector Exhaust Nozzles
  • Series Title: NACA Research Memorandums

Description

Report presenting an analysis of the problems associated with matching secondary-air requirements of ejector exhaust nozzles and auxiliary inlets has been made for free-stream Mach numbers up to 2.0. The analysis indicated that inlets located in the free stream supply higher pressure recovery than ejectors generally require for optimum net internal thrust at Mach numbers above about 1.4. Net-thrust gains can be achieved by immersing the auxiliary inlet in a boundary layer where the inlet-momentum penalty is less.

Physical Description

39 p. : ill.

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  • Accession or Local Control No: 93R17960
  • URL: http://hdl.handle.net/2060/19930088670 External Link
  • Report No.: NACA-RM-E55D21
  • Center for AeroSpace Information Number: 19930088670
  • Archival Resource Key: ark:/67531/metadc61271

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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

  • August 16, 1955

Added to The UNT Digital Library

  • Nov. 17, 2011, 10:13 p.m.

Description Last Updated

  • July 24, 2018, 3:42 p.m.

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Hearth, Donald P.; Englert, Gerald W. & Kowalski, Kenneth L. Matching of Auxiliary Inlets to Secondary-Air Requirements of Aircraft Ejector Exhaust Nozzles, report, August 16, 1955; (digital.library.unt.edu/ark:/67531/metadc61271/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.