Simultaneous Imaging of Fuel and Hydroxyl Radicals in an In-Line Four Cylinder SI Engine 932696
Fuel intake, start and propagation of combustion were studied in a Z-liter in-line four-cylinder SI engine. Two-dimensional laser induced fluorescence was used to characterize the performance of the engine. A tunable excimer laser at 248 nm and a broadband excimer laser at 308 nm were used to measure simultaneously distributions of hydroxyl radicals and fuel. LIF measurements of fuel (iso-octane) were performed by adding diethyl-ketone as fluorescence tracer to the iso-octane. The complementary information obtained from fuel and hydroxyl radical distributions is shown and differences are pointed out. Cycle to cycle variations and averaged results are discussed as function of equivalence ratio.
Citation: Arnold, A., Buschmann, A., Cousyn, B., Decker, M. et al., "Simultaneous Imaging of Fuel and Hydroxyl Radicals in an In-Line Four Cylinder SI Engine," SAE Technical Paper 932696, 1993, https://doi.org/10.4271/932696. Download Citation
A. Arnold, A. Buschmann, B. Cousyn, M. Decker, F. Vannobel, V. Sick, J. Wolfrum
University of Heidelberg
International Fuels & Lubricants Meeting & Exposition
SAE 1993 Transactions: Journal of Fuels & Lubricants-V102-4