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Single-fluid and dual-fluid atomisation methods: local and global spray quantities

Single-fluid and dual-fluid atomisation methods: local and global spray quantities
Single-fluid and dual-fluid atomisation methods: local and global spray quantities
This article describes a one-to-one comparison of spray performance for a single-fluid high-pressure swirl injection system (PSA) and a dual-fluid, air-assisted injection system (AAA) based on high-resolution CCD images and phase Doppler anemometer measurements. Both atomizer concepts are used in direct-injection spark-ignition (DISI) engine applications, and the present experiments were carried out using original engine hardware. Spray characterization was obtained in constant-volume chambers at ambient conditions corresponding to typical injection windows in DISI engines. The temporal and spatial evolution of spray pattern, mean droplet size, and droplet velocity were considered as important parameters. At atmospheric gas conditions, the rate of axial penetration was similar for both sprays, but a fourfold increase in gas density resulted in a reduction of ?50% and ?25% for the AAA and PSA, respectively. A higher level of droplet arithmetic mean diameter (D10) was generally observed for both sprays at elevated gas densities, and a correlation factor was introduced to link the space-averaged D10 and the ambient gas density.
1045-5110
123-151
Kashdan, Julian T.
151a1a96-2bf2-406f-92fa-3840b7edc9f0
Lienemann, Holger
718094b2-85ac-42a5-a85c-5e8930440a0f
Shrimpton, John S.
9cf82d2e-2f00-4ddf-bd19-9aff443784af
Kashdan, Julian T.
151a1a96-2bf2-406f-92fa-3840b7edc9f0
Lienemann, Holger
718094b2-85ac-42a5-a85c-5e8930440a0f
Shrimpton, John S.
9cf82d2e-2f00-4ddf-bd19-9aff443784af

Kashdan, Julian T., Lienemann, Holger and Shrimpton, John S. (2007) Single-fluid and dual-fluid atomisation methods: local and global spray quantities. Atomization and Sprays, 17 (2), 123-151. (doi:10.1615/AtomizSpr.v17.i2.20).

Record type: Article

Abstract

This article describes a one-to-one comparison of spray performance for a single-fluid high-pressure swirl injection system (PSA) and a dual-fluid, air-assisted injection system (AAA) based on high-resolution CCD images and phase Doppler anemometer measurements. Both atomizer concepts are used in direct-injection spark-ignition (DISI) engine applications, and the present experiments were carried out using original engine hardware. Spray characterization was obtained in constant-volume chambers at ambient conditions corresponding to typical injection windows in DISI engines. The temporal and spatial evolution of spray pattern, mean droplet size, and droplet velocity were considered as important parameters. At atmospheric gas conditions, the rate of axial penetration was similar for both sprays, but a fourfold increase in gas density resulted in a reduction of ?50% and ?25% for the AAA and PSA, respectively. A higher level of droplet arithmetic mean diameter (D10) was generally observed for both sprays at elevated gas densities, and a correlation factor was introduced to link the space-averaged D10 and the ambient gas density.

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Published date: 2007

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Local EPrints ID: 64563
URI: http://eprints.soton.ac.uk/id/eprint/64563
ISSN: 1045-5110
PURE UUID: 24f08a33-e97f-42e1-aa5a-5c33f65f415b

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Date deposited: 08 Jan 2009
Last modified: 15 Mar 2024 11:55

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Contributors

Author: Julian T. Kashdan
Author: Holger Lienemann

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