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Atomization and Sprays

Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

Institutional price:	$787.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2006, Volume16

159 pages

Issue price - $80.00

VISUALIZATION OF CAVITATION IN HIGH-PRESSURE DIESEL FUEL INJECTOR ORIFICES

Haiyun Li
MTU Aeroengines, Inc., Hartford, CT 06067, USA

Steven H. Collicott
School of Aeronautics and Astronautics, Purdue University, 1375 Aviation Drive, West Lafayette, IN 47907-2015, USA

ABSTRACT

Modern diesel fuel injectors operate at pressures of up to ∼ 200 MPa. Cavitation of the liquid fuel inside of injector orifices has long been known to occur because of structural damage to the orifice walls. Yet few visualizations of this economically important flow exist. The first true-scale, true-pressure visualizations in tilted holes are presented and discussed. True-pressure and true-scale experiments are necessary as scaling of these unsteady, nonequilibrium cavitating flows is presently impossible. The extreme pressure and the small size of these unsteady two-phase internal flows present challenges for flow visualization. Nevertheless, successful experiment design and visualization of the unsteady two-phase flow inside of true-scale tilted diesel injector holes as small as 200 μm diameter and at pressures up to 220 MPa are presented.