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An Interim Assessment of the AEAP's Emissions Characterization and Near-Field Interactions Elements (1997) / Chapter Skim
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EMISSIONS CHARACTERIZATION
Pages 4-9

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 4...
... The results of the EETCC's prioritization efforts are summarized in Engine Trace Constituent Measurements Recommended for the Assessment of the Atmospheric Effects of Stratospheric Aircraft (MiakeLye et al., 1992~. A summary version of the prioritized listing contained in that report is presented in Table 1.
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From page 5...
... conducted in an altitude test cell. However, any specific inferences concerning the SO2 oxidation characteristics observed in these tests must be tempered by the fact that the Olympus engines that power the Concorde aircraft embody old technology (circa 1965~.
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From page 6...
... Obtaining representative samples at the combustor-exit plane with gas-extraction methods is difficult because most current subsonic engines have large radial and circumferential concentration and temperature gradients. With non-intrusive measurement techniques, obtaining optical access to the combustor-exit gas flow is usually difficult because of adverse geometries and hostile environments.
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From page 7...
... Completing this pressure reduction without simultaneously altering some of the particulate characteristics is a challenge that has not yet been fully met. For these reasons, and given the limited remaining budget for this AEAP element, an increased emphasis on engine testing at cruise-altitude operating conditions and a corresponding decreased reliance on combustor-rig testing are recommended for the present.
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From page 8...
... This engine-test series should provide an excellent opportunity to obtain a quantitative determination of the future HSCT aircraft engine's emission characteristics at cruise. Prior to this dedicated-demonstrator test, engine tests to assess the degrees of SOX oxidation occurring within engines should be conducted.
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From page 9...
... In all cases, emphasis should be focused on measurements at the engine-exit plane, rather than at the combustor-exit plane.
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Key Terms

  • subsonic engines
  • aeap element
  • emissions characterization
  • aircraft engine
  • engine tests

  • test series
  • emission characteristics
  • work scope
  • hsct engine
  • soot particulate

  • altitude test
  • particulate emission
  • advanced subsonic
  • hsct aircraft
  • future hsct

  • concorde aircraft
  • analytical models
  • computational fluid
  • analysis methods
  • fluid dynamics

  • characterization element
  • soot particulates
  • operating conditions
  • engine exhaust
  • chemistry committee

  • nitrogen oxides
  • particulate formation
  • circumferential concentration
  • measuring emitted
  • work planned


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