Experimental Investigation of Diffuser Pressure-Ratio Control With Shock-Positioning Limit on 28-Inch Ram-Jet Engine

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The performance of a control system designed for variable thrust applications was determined in an altitude free-jet facility at various Mach numbers, altitudes and angles of attack for a wide range of engine operation. The results are presented as transient response characteristics for step disturbances in fuel flow and stability characteristics as a function of control constants and engine operating conditions. The results indicate that the control is capable of successful operation over the range of conditions tested, although variations in engine gains preclude optimum response characteristics at all conditions with fixed control constants.

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Dunbar, William R.; Wentworth, Carl B. & Crowl, Robert J. January 15, 1957.

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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 73 times , with 5 in the last month . More information about this report can be viewed below.

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  • Main Title: Experimental Investigation of Diffuser Pressure-Ratio Control With Shock-Positioning Limit on 28-Inch Ram-Jet Engine
  • Series Title: NACA Research Memorandums

Description

The performance of a control system designed for variable thrust applications was determined in an altitude free-jet facility at various Mach numbers, altitudes and angles of attack for a wide range of engine operation. The results are presented as transient response characteristics for step disturbances in fuel flow and stability characteristics as a function of control constants and engine operating conditions. The results indicate that the control is capable of successful operation over the range of conditions tested, although variations in engine gains preclude optimum response characteristics at all conditions with fixed control constants.

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  • Accession or Local Control No: 93R18648
  • URL: http://hdl.handle.net/2060/19930089358 External Link
  • Report No.: NACA-RM-E56F26
  • Center for AeroSpace Information Number: 19930089358
  • Archival Resource Key: ark:/67531/metadc62697

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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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  • January 15, 1957

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  • Nov. 17, 2011, 10:13 p.m.

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  • July 24, 2018, 2:03 p.m.

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Dunbar, William R.; Wentworth, Carl B. & Crowl, Robert J. Experimental Investigation of Diffuser Pressure-Ratio Control With Shock-Positioning Limit on 28-Inch Ram-Jet Engine, report, January 15, 1957; (digital.library.unt.edu/ark:/67531/metadc62697/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.