Critical reaction rates in hypersonic combustion chemistry

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High Mach number flight requires that the scramjet propulsion system operate at a relatively low static inlet pressure and a high inlet temperature. These two constraints can lead to extremely high temperatures in the combustor, yielding high densities of radical species and correspondingly poor chemical combustion efficiency. As the temperature drops in the nozzle expansion, recombination of these excess radicals can produce more product species, higher heat yield, and potentially more thrust. The extent to which the chemical efficiency can be enhanced in the nozzle expansion depends directly on the rate of the radical recombination reactions. A comprehensive assessment of ... continued below

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Pages: 7

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Oldenborg, R.C.; Harradine, D.M.; Loge, G.W.; Lyman, J.L.; Schott, G.L. & Winn, K.R. January 1, 1989.

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Description

High Mach number flight requires that the scramjet propulsion system operate at a relatively low static inlet pressure and a high inlet temperature. These two constraints can lead to extremely high temperatures in the combustor, yielding high densities of radical species and correspondingly poor chemical combustion efficiency. As the temperature drops in the nozzle expansion, recombination of these excess radicals can produce more product species, higher heat yield, and potentially more thrust. The extent to which the chemical efficiency can be enhanced in the nozzle expansion depends directly on the rate of the radical recombination reactions. A comprehensive assessment of the important chemical processes and an experimental validation of the critical rate parameters is therefore required if accurate predictions of scramjet performance are to be obtained. This report covers the identification of critical reactions, and the critical reaction rates in hypersonic combustion chemistry. 4 refs., 2 figs.

Physical Description

Pages: 7

Notes

NTIS, PC A02/MF A01 - OSTI; 1.

Source

  • 198. American Chemical Society national meeting, Miami, FL, USA, 10-15 Sep 1989

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  • Other: DE89014278
  • Report No.: LA-UR-89-2170
  • Report No.: CONF-890902-12
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5638222
  • Archival Resource Key: ark:/67531/metadc1094122

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  • January 1, 1989

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • May 22, 2018, 12:22 p.m.

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Oldenborg, R.C.; Harradine, D.M.; Loge, G.W.; Lyman, J.L.; Schott, G.L. & Winn, K.R. Critical reaction rates in hypersonic combustion chemistry, article, January 1, 1989; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1094122/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.