Abstract
This study is focused to propose the new spray-wall interaction model for application of direct injection engine systems. In this paper, the experimental approaches are discussed for two kinds of droplet-spray regime. As the 1st step, small non-dispersed droplets or droplet array impinge on the heated flat wall with the variation of droplet Weber number, impingement angle and wall temperature. In the 2nd step, actual spray through the gasoline injector for D.I.S.I. Is impinged on the flat wall. Here, droplet behavior on the wall and post impingement properties are measured by high-speed photographic systems. Then, the new submodel is constructed based on droplets experimental results. This new model is incrporated into KIVA-3 code. And the results calculated by this model are compared with experimental results. It was found that the results by this model for the spray dispersion near the wall were consistent well with the actual process over all boiling state conditions.
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