Impinging Diesel Sprays
2008 (English)In: Atomization and sprays, ISSN 1044-5110, Vol. 18, no 2, 97-127 p.Article in journal (Refereed) Published
Diesel fuel sprays from a common-rail injector have been optically investigated with respect to their macroscale characteristics. The tested nozzle designs were of standard plain orifice type, as well as the impinging-spray type, in which two orifices intersect at a specific angle at the exit. Testing was conducted using a pressurized vessel at room temperature. The impinging sprays were found to be low penetrating and widely dispersed compared to the nonimpinging sprays. The shape of the impinging sprays was as one homogeneous spray with no trace of individual sprays. It was found that impinging diesel sprays can be predicted in a manner similar to standard nonimpinging sprays, using a dimensionless penetration correlation. The cone angle of the impinging sprays increases with the impingement angle, and in contrast to nonimpinging sprays, appears insensitive to ambient density. The results indicate that the impinging spray has a larger spray volume at lower ambient densities. However, at higher ambient densities, the volume of the nonimpinging sprays is larger.
Place, publisher, year, edition, pages
2008. Vol. 18, no 2, 97-127 p.
Correlation methods; Fuel injection; Pressure vessels; Spraying; Impinging sprays; Room temperature; Diesel fuels; Correlation methods; Diesel fuels; Fuel injection; Pressure vessels; Spraying
IdentifiersURN: urn:nbn:se:kth:diva-6776ISI: 000248847200001OAI: oai:DiVA.org:kth-6776DiVA: diva2:11581
QC 20100825. Uppdaterad från Accepted till Published 20100825.2007-02-142007-02-142010-08-25Bibliographically approved