Chemical species tomography by near infra-red absorption

The spatial distribution of chemical species can be a critical determinant of the performance of chemical reactors. One such reactor is the combustion chamber of the Internal Combustion engine. This paper presents a design fo r the measurement of hydrocarbon concentration distribution within a runnin g engine using near infra-red absorption tomography. The fundamentals of th e technique, and design parameters for the equipment are discussed. By util ising micro-optic components, a minimally invasive system is feasible and b y utilising advanced laser/photodetector combinations, good temporal perfor mance is anticipated. (C)2000 Elsevier Science S.A. All rights reserved.