Abstract

Inside the combustion chamber of a spark-ignition engine, NO fluorescence is excited with a narrow-band tunable KrF excimer laser. The fluorescence light is detected by an intensified CCD camera that yields images of the NO distributions. Rotational–vibrational transitions of NO are excited by the A 2Σ+X 2Π (0, 2) band system around 248 nm. Single laser shot planar NO distributions are obtained with good signal-to-noise ratio at all crank angles and allow us to locate areas of NO formation during combustion. The pressure within the combustion chamber is measured simultaneously with the NO distributions, which allows the evaluation of correlations between indicated work and NO formation. The crank-angle-resolved sequences of two-dimensional NO distributions and averaged pressure traces are presented for different engine-operating conditions. In addition, laser-induced predissociation fluorescence of OH excited by the same laser source is measured in order to visualize the corresponding flame front propagation and to compare the time of formation of NO relative to that of OH.

© 1996 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Two-photon nitric oxide laser-induced fluorescence measurements in a diesel engine

Glen C. Martin, Charles J. Mueller, and Chia-Fon F. Lee
Appl. Opt. 45(9) 2089-2100 (2006)

Investigation of spatially resolved light absorption in a spark-ignition engine fueled with propane/air

Frank Hildenbrand, Christof Schulz, Eberhard Wagner, and Volker Sick
Appl. Opt. 38(9) 1452-1458 (1999)

Fluorescence imaging inside an internal combustion engine using tunable excimer lasers

Peter Andresen, Gerard Meijer, Harald Schlüter, Heiner Voges, Andrea Koch, Werner Hentschel, Winfried Oppermann, and Erhard Rothe
Appl. Opt. 29(16) 2392-2404 (1990)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (14)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription