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Cavitation in Diesel Fuel Injector Nozzles and its Influence on Atomization and Spray
Author(s) -
Sun Yubiao,
Guan Zhiqiang,
Hooman Kamel
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800323
Subject(s) - cavitation , nozzle , spray characteristics , injector , breakup , spray nozzle , fuel injection , diesel fuel , mechanics , sauter mean diameter , discharge coefficient , diesel engine , materials science , flow (mathematics) , homogeneous , thermodynamics , mechanical engineering , automotive engineering , engineering , physics
In combustors, high‐pressure fuel injector nozzles are employed for liquid atomization and spray generation. The internal flow within nozzles, especially cavitation, plays an important role in promoting the breakup of liquid jets. The formation mechanism and evolvement of cavitation are reviewed and described. Different cavitation regimes were characterized experimentally and the positive effect of cavitation on liquid atomization was confirmed. Different empirical formulas correlating the discharge coefficient with fluid‐dynamical parameters are summarized. The applicability, advantages, and disadvantages of two popular computational models for flow modeling, i.e., the interface tracking model and the homogeneous equilibrium model, are reviewed. The effects of cavitation on the generated spray are discussed.