The spray characteristics of a pressure-swirl injector with various exit plane tilts

Seoksu Moon, E. Abo-Serie, Choonsik Bae

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The gasoline spray characteristics of a pressure-swirl injector were investigated with various exit plane tilts. The analysis focused on the correlation between tilt angle and flow angle. Mie-scattering technique and phase Doppler anemometry were employed to analyze the macroscopic spray development and droplet size distribution of the spray. An analytical method for mass flux estimation was applied to understand the velocity distribution at the nozzle exit. The results showed that the spray shape and velocity distribution of the spray were more asymmetrical at high tilt angles. In particular, an opened hollow cone spray was formed when the tilt angle is greater than the complementary flow angle. The pressure drop inside the spray, one of the crucial factors for the swirl spray collapse at various surrounding conditions, was attenuated in this opened hollow cone spray since the pressure inside the spray was assimilated to the surrounding air pressure. The spray collapse at high fuel temperature and back pressure conditions did not appear when the tilt angle is larger than the complementary flow angle due to the reduced pressure drop inside the spray. However, tilt angle should be optimized to fulfill the requirements of spray robustness and avoid the locally rich area. The droplet size of 70° tilted nozzle spray shows a value similar to that of the original swirl spray in the plane that includes nozzle axis and the major axis of exit surface ellipse (Major axis plane) while it shows an increased value in the plane that includes nozzle axis and the minor axis of exit surface ellipse (Minor axis plane).
Original languageEnglish
Pages (from-to)615-627
Number of pages13
JournalInternational Journal of Multiphase Flow
Volume34
Issue number7
Early online date5 Feb 2008
DOIs
Publication statusPublished - Jul 2008

Fingerprint

spray characteristics
injectors
sprayers
Nozzles
Velocity distribution
Pressure drop
Cones
Spray nozzles
Gasoline
nozzles
Mass transfer
Scattering
ellipses
pressure drop
hollow
Air
cones
velocity distribution
spray nozzles
gasoline

Keywords

  • Pressure-swirl spray
  • Tilted nozzle
  • Tilt angle
  • Flow angle

Cite this

The spray characteristics of a pressure-swirl injector with various exit plane tilts. / Moon, Seoksu; Abo-Serie, E.; Bae, Choonsik.

In: International Journal of Multiphase Flow, Vol. 34, No. 7, 07.2008, p. 615-627.

Research output: Contribution to journalArticle

@article{785a0a0f1e264869bac34c04ad3462b5,
title = "The spray characteristics of a pressure-swirl injector with various exit plane tilts",
abstract = "The gasoline spray characteristics of a pressure-swirl injector were investigated with various exit plane tilts. The analysis focused on the correlation between tilt angle and flow angle. Mie-scattering technique and phase Doppler anemometry were employed to analyze the macroscopic spray development and droplet size distribution of the spray. An analytical method for mass flux estimation was applied to understand the velocity distribution at the nozzle exit. The results showed that the spray shape and velocity distribution of the spray were more asymmetrical at high tilt angles. In particular, an opened hollow cone spray was formed when the tilt angle is greater than the complementary flow angle. The pressure drop inside the spray, one of the crucial factors for the swirl spray collapse at various surrounding conditions, was attenuated in this opened hollow cone spray since the pressure inside the spray was assimilated to the surrounding air pressure. The spray collapse at high fuel temperature and back pressure conditions did not appear when the tilt angle is larger than the complementary flow angle due to the reduced pressure drop inside the spray. However, tilt angle should be optimized to fulfill the requirements of spray robustness and avoid the locally rich area. The droplet size of 70° tilted nozzle spray shows a value similar to that of the original swirl spray in the plane that includes nozzle axis and the major axis of exit surface ellipse (Major axis plane) while it shows an increased value in the plane that includes nozzle axis and the minor axis of exit surface ellipse (Minor axis plane).",
keywords = "Pressure-swirl spray, Tilted nozzle, Tilt angle, Flow angle",
author = "Seoksu Moon and E. Abo-Serie and Choonsik Bae",
year = "2008",
month = "7",
doi = "10.1016/j.ijmultiphaseflow.2008.01.003",
language = "English",
volume = "34",
pages = "615--627",
journal = "International Journal of Multiphase Flow",
issn = "0301-9322",
publisher = "Elsevier",
number = "7",

}

TY - JOUR

T1 - The spray characteristics of a pressure-swirl injector with various exit plane tilts

AU - Moon, Seoksu

AU - Abo-Serie, E.

AU - Bae, Choonsik

PY - 2008/7

Y1 - 2008/7

N2 - The gasoline spray characteristics of a pressure-swirl injector were investigated with various exit plane tilts. The analysis focused on the correlation between tilt angle and flow angle. Mie-scattering technique and phase Doppler anemometry were employed to analyze the macroscopic spray development and droplet size distribution of the spray. An analytical method for mass flux estimation was applied to understand the velocity distribution at the nozzle exit. The results showed that the spray shape and velocity distribution of the spray were more asymmetrical at high tilt angles. In particular, an opened hollow cone spray was formed when the tilt angle is greater than the complementary flow angle. The pressure drop inside the spray, one of the crucial factors for the swirl spray collapse at various surrounding conditions, was attenuated in this opened hollow cone spray since the pressure inside the spray was assimilated to the surrounding air pressure. The spray collapse at high fuel temperature and back pressure conditions did not appear when the tilt angle is larger than the complementary flow angle due to the reduced pressure drop inside the spray. However, tilt angle should be optimized to fulfill the requirements of spray robustness and avoid the locally rich area. The droplet size of 70° tilted nozzle spray shows a value similar to that of the original swirl spray in the plane that includes nozzle axis and the major axis of exit surface ellipse (Major axis plane) while it shows an increased value in the plane that includes nozzle axis and the minor axis of exit surface ellipse (Minor axis plane).

AB - The gasoline spray characteristics of a pressure-swirl injector were investigated with various exit plane tilts. The analysis focused on the correlation between tilt angle and flow angle. Mie-scattering technique and phase Doppler anemometry were employed to analyze the macroscopic spray development and droplet size distribution of the spray. An analytical method for mass flux estimation was applied to understand the velocity distribution at the nozzle exit. The results showed that the spray shape and velocity distribution of the spray were more asymmetrical at high tilt angles. In particular, an opened hollow cone spray was formed when the tilt angle is greater than the complementary flow angle. The pressure drop inside the spray, one of the crucial factors for the swirl spray collapse at various surrounding conditions, was attenuated in this opened hollow cone spray since the pressure inside the spray was assimilated to the surrounding air pressure. The spray collapse at high fuel temperature and back pressure conditions did not appear when the tilt angle is larger than the complementary flow angle due to the reduced pressure drop inside the spray. However, tilt angle should be optimized to fulfill the requirements of spray robustness and avoid the locally rich area. The droplet size of 70° tilted nozzle spray shows a value similar to that of the original swirl spray in the plane that includes nozzle axis and the major axis of exit surface ellipse (Major axis plane) while it shows an increased value in the plane that includes nozzle axis and the minor axis of exit surface ellipse (Minor axis plane).

KW - Pressure-swirl spray

KW - Tilted nozzle

KW - Tilt angle

KW - Flow angle

U2 - 10.1016/j.ijmultiphaseflow.2008.01.003

DO - 10.1016/j.ijmultiphaseflow.2008.01.003

M3 - Article

VL - 34

SP - 615

EP - 627

JO - International Journal of Multiphase Flow

JF - International Journal of Multiphase Flow

SN - 0301-9322

IS - 7

ER -