It is important for dynamic combustion control to collect the information of gaseous species in combustion systems including their concentrations and distributions. Absorption laser spectroscopy has been an effective tool for detection and measurement of gaseous species found and produced in combustion process. This paper studies the computation model to inverse oxygen concentrations from measurement data based on Beer-Lambert law, Lorentz distribution and HITRAN2004 database. The paper presents a fixed wavelength laser absorption spectroscopy consisting of economical laser sensors. The scheme of experiment was presented for measuring the concentration of gaseous oxygen in a single species and a mixture of Oxygen and Helium separately using a 780 nm laser diode and a 633 nm Helium Neon laser. Experimental data were agreed well with the data in HITRAN2004.

Volume Subject Area:
Heat Transfer
Keywords:
Absorption spectroscopy, combustion diagnostics and control, HITRAN2004
Topics:
Absorption, Absorption spectroscopy, Combustion, Laser spectroscopy, Oxygen, Lasers, Beer's law, Combustion systems, Computation, Databases, Helium, Helium-neon lasers, Sensors, Wavelength
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