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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 34 — Dec. 1, 2007
  • pp: 8322–8327

Quantification of the evaporative cooling in an ethanol spray created by a gasoline direct-injection system measured by multiline NO-LIF gas-temperature imaging

Helmut Kronemayer, Kemal Omerbegovic, and Christof Schulz  »View Author Affiliations


Applied Optics, Vol. 46, Issue 34, pp. 8322-8327 (2007)
http://dx.doi.org/10.1364/AO.46.008322


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Abstract

Two-dimensional gas-phase temperature fields were quantitatively measured in an evaporating ethanol spray with multiline excitation thermometry based on laser-induced fluorescence of nitric oxide (NO-LIF). This technique yields absolute temperature fields without calibration and simultaneously detects the spray position. The accuracy of the presented temperature measurements is ± 1   K . Systematic errors of the scanned multiline thermometry approach due to time averaging in turbulent systems were investigated and found to be negligible. The pulsed spray was generated by a gasoline direct-injection nozzle with swirl injecting ethanol into air in a flow cell at room temperature and atmospheric pressure. The gas temperature inside the spray cloud was found to decrease by 10 K at 5 10   ms after injection. Different injection pressures influence the evaporation behavior.

© 2007 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(120.6780) Instrumentation, measurement, and metrology : Temperature
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 22, 2007
Revised Manuscript: October 19, 2007
Manuscript Accepted: October 22, 2007
Published: November 29, 2007

Citation
Helmut Kronemayer, Kemal Omerbegovic, and Christof Schulz, "Quantification of the evaporative cooling in an ethanol spray created by a gasoline direct-injection system measured by multiline NO-LIF gas-temperature imaging," Appl. Opt. 46, 8322-8327 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-34-8322


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References

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