Abstract
The imaging of two-dimensional laser-induced fluorescence is used for simultaneous, multiple point visualization of OH radical concentration in the combustion chamber of a single cylinder internal combustion engine. Sheet illumination from the frequency doubled output of a Nd:YAG pumped dye laser is used to excite the fluorescence which is detected using an image-intensified Reticon diode array camera. The camera is interfaced to an IBM-PC AT microcomputer for data acquisition and processing. The laser and camera are synchronized with the crankshaft of the engine so that 2-D images of the OH fluorescence can be obtained at different times through the engine cycle.
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