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Laser characterization of a port fuel injector to provide boundary data for computational fluid dynamics
Published November 01, 2000 by Institution of Mechanical Engineers in United Kingdom
Phase doppler anemometry and laser sheet imaging have been performed on the spray from a multiple-hole, gasoline port fuel injector. Data has been collected for both continuous and pulsed operation, with the aim of providing initial boundary and validation data for computational spray modeling. The study showed that the injector produced two streams of finely atomized spray, with break-up taking place almost immediately. At the first measurement plane, 20 mm downstream of the injector, the two spray streams overlap. Inputting these PDA data directly into the computational models is difficult, requiring knowledge about how the two streams interact. Instead it is proposed that data are applied at the injector tip and tuned until the correct downstream conditions are met.