Experimental investigation of stage performance of J71 three-stage turbine

One of 5,163 reports in the series: NACA Research Memorandums available on this site.

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An experimental investigation of the stage performance of the J71 three-stage turbine at design speed and pressure ratio was conducted as part of a program involving research on the design and operational characteristics of high-work-output multistage axial-flow turbines. The investigation indicated that the over-all work output of the turbine based on temperature measurements at design speed and pressure ratio was 95 percent of the design value, with the greatest loss in work output and efficiency occurring in the first stage. Choking in the second-stage stator over most of the pressure ratios investigated prevented the attainment of design first-stage work output ... continued below

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Forrette, Obert E December 20, 1954.

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  • Main Title: Experimental investigation of stage performance of J71 three-stage turbine
  • Series Title: NACA Research Memorandums

Description

An experimental investigation of the stage performance of the J71 three-stage turbine at design speed and pressure ratio was conducted as part of a program involving research on the design and operational characteristics of high-work-output multistage axial-flow turbines. The investigation indicated that the over-all work output of the turbine based on temperature measurements at design speed and pressure ratio was 95 percent of the design value, with the greatest loss in work output and efficiency occurring in the first stage. Choking in the second-stage stator over most of the pressure ratios investigated prevented the attainment of design first-stage work output and also prevented any increase in work output of the first stage with increasing over-all pressure ratio at design speed. High losses in the first stage were a contributing factor to this choking condition.

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  • Accession or Local Control No: 93R23297
  • URL: http://hdl.handle.net/2060/19930093971 External Link
  • Report No.: NACA-RM-E54I09
  • Center for AeroSpace Information Number: 19930093971
  • Archival Resource Key: ark:/67531/metadc63061

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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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  • December 20, 1954

Added to The UNT Digital Library

  • Nov. 17, 2011, 5:13 p.m.

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  • March 27, 2018, 4:10 p.m.

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Forrette, Obert E. Experimental investigation of stage performance of J71 three-stage turbine, report, December 20, 1954; (digital.library.unt.edu/ark:/67531/metadc63061/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.