Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Crank-angle-resolved laser-induced fluorescence imaging of NO in a spark-ignition engine at 248 nm and correlations to flame front propagation and pressure release

Not Accessible

Your library or personal account may give you access

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
More Like This
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)

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)

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 Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved