Abstract

Laser-induced fluorescence is used to quantify the thickness of liquid films. An optimisation of the fluorescent tracer to make it evaporate at the same ratios as gasoline is performed since the final application is the study of evaporating films, as those found in intake pipes of port-injected spark-ignited engines. The liquid studied is iso-octane and the tracer is a ketone. Because of distillation, the tracer concentration in the liquid film may not remain constant. The most suitable tracers are C6 ketones.

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