Effect of exit-slot position and opening on the available cooling pressure for NACA nose-slot cowlings

One of 1,423 reports in the series: NACA Technical Reports available on this site.

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Description

Report presents the results of an investigation of full-scale nose-slot cowlings conducted in the NACA 20-foot wind tunnel to furnish information on the pressure drop available for cooling. Engine conductances from 0 to 0.12 and exit-slot conductances from 0 to 0.30 were covered. Two basic nose shapes were tested to determine the effect of the radius of curvature of the nose contour; the nose shape with the smaller radius of curvature gave the higher pressure drop across the engine. The best axial location of the slot for low-speed operation was found to be in the region of maximum negative pressure ... continued below

Physical Description

163 - 174 p. : ill.

Creation Information

Stickle, George W.; Naiman, Irven & Crigler, John L. January 18, 1939.

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

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  • Main Title: Effect of exit-slot position and opening on the available cooling pressure for NACA nose-slot cowlings
  • Series Title: NACA Technical Reports

Description

Report presents the results of an investigation of full-scale nose-slot cowlings conducted in the NACA 20-foot wind tunnel to furnish information on the pressure drop available for cooling. Engine conductances from 0 to 0.12 and exit-slot conductances from 0 to 0.30 were covered. Two basic nose shapes were tested to determine the effect of the radius of curvature of the nose contour; the nose shape with the smaller radius of curvature gave the higher pressure drop across the engine. The best axial location of the slot for low-speed operation was found to be in the region of maximum negative pressure for the basic shape for the particular operating condition. The effect of the pressure operating condition on the available cooling pressure is shown.

Physical Description

163 - 174 p. : ill.

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Identifier

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  • Accession or Local Control No: 93R21054
  • URL: http://hdl.handle.net/2060/19930091764 External Link
  • Report No.: NACA-TR-687
  • Center for AeroSpace Information Number: 19930091764
  • Archival Resource Key: ark:/67531/metadc66347

Collections

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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).

Technical Report Archive and Image Library

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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Creation Date

  • January 18, 1939

Added to The UNT Digital Library

  • Nov. 17, 2011, 10:13 p.m.

Description Last Updated

  • June 12, 2018, 3:08 p.m.

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Stickle, George W.; Naiman, Irven & Crigler, John L. Effect of exit-slot position and opening on the available cooling pressure for NACA nose-slot cowlings, report, January 18, 1939; (digital.library.unt.edu/ark:/67531/metadc66347/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.