An Investigation of the Breakup Mechanisms for Swirl Sprays From High-Pressure Swirl Injectors

An Investigation of the Breakup Mechanisms for Swirl Sprays From High-Pressure Swirl Injectors

ICLASS 2003

Authors:

Christos A. Chryssakis, Dennis N. Assanis (University of Michigan), Jee-Kuen Lee, Keiya Nishida (University of Hiroshima)

Abstract:

A computational model for swirl sprays from inwardly opening swirl injectors used in direct-injection gasoline engines has been developed, accounting both for primary and secondary breakup processes. Good agreement is demonstrated for the main part of the spray under atmospheric pressure. However discrepancies occur for higher ambient pressures and for the pre-swirl spray under atmospheric pressure. An in-depth analysis of pre-spray and high pressure results is presented here in an attempt to explain the causes of these discrepancies and suggest ways to improve the current breakup models.

Paper: P2003_02.PDF