Abstract
This paper describes multiple hollow-cone spray formation using newly developed plate-type multi-hole nozzle for SI engine fuel injector. Atomization process and spray characteristics of the prototype nozzles were examined experimentally. It was found that hollow-cone shaped liquid sheet was injected from each nozzle hole of the new nozzles. Breakup length of liquid film injected from the new nozzle was much shorter than that from the conventional nozzle. Mean droplet size of the new nozzle was also much smaller than that of the conventional nozzle. The liquid flow in the nozzle was simulated numerically. The result showed that the liquid flew into each nozzle hole with circumvolution. The hollow-cone liquid sheet should be injected from each nozzle hole owing to the circumvolution.
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