Investigation of turbines suitable for use in a turbojet engine with high compressor pressure ratio and low compressor-tip speed VII : experimental performance of modified two-stage turbine

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

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Description

Modifying the original turbine by closing down the first-rotor throat area and shrouding the first and second rotors resulted in an over-all increase in in efficiency of 3.5 percentage points. At equivalent design work and speed the rating and aerodynamic efficiences of the modified turbine were 0.825 and 0.846, respectively. The maximum rating and erodynamic efficiencies were 0.875 and 0.906, respectively. A radial survey indicated improved firstively. A radial survey indicated improved first and second-stage efficiencies but showed that the effective throat areas of the second stator and rotor were too large.

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Davison, Elmer H; Petrash, Donald A & Schum, Harold J October 29, 1956.

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  • Main Title: Investigation of turbines suitable for use in a turbojet engine with high compressor pressure ratio and low compressor-tip speed VII : experimental performance of modified two-stage turbine
  • Series Title: NACA Research Memorandums

Description

Modifying the original turbine by closing down the first-rotor throat area and shrouding the first and second rotors resulted in an over-all increase in in efficiency of 3.5 percentage points. At equivalent design work and speed the rating and aerodynamic efficiences of the modified turbine were 0.825 and 0.846, respectively. The maximum rating and erodynamic efficiencies were 0.875 and 0.906, respectively. A radial survey indicated improved firstively. A radial survey indicated improved first and second-stage efficiencies but showed that the effective throat areas of the second stator and rotor were too large.

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  • : 93R18904
  • URL: http://hdl.handle.net/2060/19930089614 External Link
  • Report No.: NACA-RM-E56H14a
  • Center for AeroSpace Information Number: 19930089614
  • Archival Resource Key: ark:/67531/metadc63214

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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

  • October 29, 1956

Added to The UNT Digital Library

  • Nov. 17, 2011, 10:13 p.m.

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  • Jan. 31, 2017, 11:56 a.m.

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Davison, Elmer H; Petrash, Donald A & Schum, Harold J. Investigation of turbines suitable for use in a turbojet engine with high compressor pressure ratio and low compressor-tip speed VII : experimental performance of modified two-stage turbine, report, October 29, 1956; (digital.library.unt.edu/ark:/67531/metadc63214/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.