Graduate Thesis Or Dissertation
 

Combustion gas emissions spectra of Otto cycle engine operating on H₂, CO, and gasoline using a calibrated vidicon detector spectrometer

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  • The capabilities of the Tektronix Model J2C/7J20 Rapid Scanning Spectrometer for the determination of molecular species resulting from Otto cycle combustion were experimentally investigated after a literature search of the subject area. Combustion of hydrogen-air, carbon monoxideair, and gasoline-air mixtures in the combustion chamber of a Cooperative Fuel Research engine was observed using a quartz window and glass fibre optic light path. Various fuel-air ratios were tested for each fuel. The experimental work indicated that the Tektronix unit was well adapted to monitoring the rapidly changing light emissions and for rapid searches of the spectrum for any spectral features cf interest. Only emissions from CO, CO₂ and H₂O were identified with certainty as the band spectra of these molecules masked emissions of ther species thermodynamically predicted to exist. An improved optical connection and a light gating system are suggested as means to improve the instrument's resolving power for this application.
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