Abstract

This paper describes the design and experimental application of an optical system to perform schlieren measurements in the curved geometry of the cylinder of an optically accessible internal combustion engine. Key features of the system are a pair of cylindrical positive meniscus lenses, which keep the beam collimated while passing through the unmodified, thick-walled optical cylinder, and a pulsed, high-power light-emitting diode with narrow spectral width. In combination with a high-speed CMOS camera, the system is used to visualize the fuel jet after injection of hydrogen fuel directly into the cylinder from a high-pressure injector. Residual aberrations, which limit the system’s sensitivity, are characterized experimentally and are compared to the predictions of ray-tracing software.

© 2013 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Application of a high-repetition-rate laser diagnostic system for single-cycle-resolved imaging in internal combustion engines

Johan Hult, Mattias Richter, Jenny Nygren, Marcus Aldén, Anders Hultqvist, Magnus Christensen, and Bengt Johansson
Appl. Opt. 41(24) 5002-5014 (2002)

Schlieren-based temperature measurement inside the cylinder of an optical spark ignition and homogeneous charge compression ignition engine

Pavlos Aleiferis, Alexandros Charalambides, Yannis Hardalupas, Nikolaos Soulopoulos, A. M. K. P. Taylor, and Yunichi Urata
Appl. Opt. 54(14) 4566-4579 (2015)

Application of tunable excimer lasers to combustion diagnostics: a review

Erhard W. Rothe and Peter Andresen
Appl. Opt. 36(18) 3971-4033 (1997)

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 (9)

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