文档介绍：Appl. Phys. B 90, 619–628 (2008) Applied Physics B
DOI: -007-2925-y Lasers and Optics
a. farooqu CO2 concentration and temperature sensor for
. jeffries
. bustion gases using diode-laser absorption
near µm
High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering,
Stanford University, Stanford, CA 94305, USA
Received: 16 October 2007/ species concentration, velocity, density, mass flux, and pres-
Revised version: 10 December 2007 sure in a variety bustion environments [1–5]. The
Published online: 29 January 2008 •© Springer-Verlag 2008 information provided by such sensors can be useful in the de-
velopment of modern propulsion bustion systems,
ABSTRACT A new tunable diode-laser sensor based on CO
2 . to facilitate design advancements, improve efficiency, and
absorption near µm is developed for high-resolution ab-
reduce pollutant emissions. CO2 is an attractive target gas
sorption measurements of CO2 concentration and temperature.
The sensor probes the R(28) and P(70) transitions of the for hydrocarbon-fueled systems as it is a bustion
product and its concentration can be interpreted to indicate
ν1 + bination band of CO2 that has stronger absorp-
tion line-strengths than the bands near µ bustion efficiency. CO2 has absorption spectra in the near-
previously to sense CO2 bustion gases. The inc