Measurement of gaseous hydrocarbon distribution by a near-infrared absorption tomography system

Francis P. Hindle; Steve J. Carey; Krikor B. Ozanyan; Desmond E. Winterbone; Eric Clough; Hugh McCann

doi:10.1117/1.1377306

1 July 2001 Measurement of gaseous hydrocarbon distribution by a near-infrared absorption tomography system

Francis P. Hindle, Steve J. Carey, Krikor B. Ozanyan, Desmond E. Winterbone, Eric Clough, Hugh McCann

Journal of Electronic Imaging, Vol. 10, Issue 3, (July 2001). https://doi.org/10.1117/1.1377306

The spatial distribution of chemical species can be a critical determinant of chemical reactor performance. The spatial variation of air-fuel ratio in a combustion chamber of an internal combustion engine has significant influence on fuel efficiency and emissions. We report the development of a fiber-based near-infrared absorption tomography system, to measure the distribution of hydrocarbons in cylinder. It has been successfully applied to transient gas injections. The technique exploits the specific (but weak) hydrocarbon absorption of 1.7 mm radiation, which wavelength has only recently become accessible by availability of solid-state alloptoelectronic components. A standard telecommunications laser was also deployed to measure reference information. The measurement space is sampled by 32 dual- wavelength fiber-coupled measurement paths. The logarithm of the ratio of the two measurements yields the path integral of the hydrocarbon absorption, and hence, of concentration. The path integral is measured with typically 28 dB signal-to-noise ratio. Single-channel characterization shows that the technique is readily calibrated for temperature and pressure effects, over the region 70– 150 °C and 1–10 bar. Tomographic reconstruction of different gaseous hydrocarbon flows has been achieved with spatial resolution of the order D/5, where D is the vessel diameter. Temporal resolution of about 1000 frames/s is demonstrated.

©(2001) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Francis P. Hindle, Steve J. Carey, Krikor B. Ozanyan, Desmond E. Winterbone, Eric Clough, and Hugh McCann "Measurement of gaseous hydrocarbon distribution by a near-infrared absorption tomography system," Journal of Electronic Imaging 10(3), (1 July 2001). https://doi.org/10.1117/1.1377306

Published: 1 July 2001

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available