ITEMS

modern scholarly publishers in the finest tradition

Journals

	Search

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

2002, Volume12

204 pages

Issue price - $75.00

NUMERICAL STUDIES OF AIR-ASSISTED SPRAYS

Dar-Lon Chang
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, 140 Mechanical Engineering Building, 1206 West Green Street, Urbana, IL 61801

Chia-fon F. Lee
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, 140 Mechanical Engineering Building, 1206 West Green Street, Urbana, IL 61801

ABSTRACT

Simulations were made of sprays from a Ford Air-Assisted Fuel Injector to ascertain the importance of numerical arid modeling issues. A previously developed injector model was implemented and appropriate boundary conditions were applied to an axisymmetric domain. Numerical studies were conducted to assess the effects of grid resolution, boundary placement, timestep size, and number of injected parcels. Modeling studies also showed that secondary droplet breakup and collision phenomena should not be neglected, and that the use of a multicomponent fuel produces spray images that are nearly identical to those of a single-component fuel. However, the fuel vaporization of a multicomponent case is significantly different from that of a single-component case. These numerical and modeling studies established baseline simulations for a low- and a high-ambient pressure case (0.1 and 0.445 MPa, respectively), and the simulated spray images showed good agreement with experimental spray photographs of transient injection events from the Ford injector.