The fuel spray of an injector for automobile engines contains multiscale free surfaces: liquid films formed at the fuel-injector outlet, ligaments generated by liquid-film breakup, and droplets generated from the ligaments within the secondary-drop-breakup region. To simulate these multiscale free surfaces, we developed a method that combines two types of simulation. The liquid-film breakup near the injector outlet was simulated by using a particle method, and the secondary-drop breakup after the liquid-film breakup was simulated by using a discrete droplet model (DDM). The injection conditions of DDM were the distributions of droplet diameters and velocities calculated in the liquid-film-breakup simulation. We applied our method to simulate the spray from a collision-type fuel injector. The simulated liquid-film breakup near the injector outlet and behavior of the secondary-drop breakup qualitatively agreed with measurements. Furthermore, the errors of the mean droplet diameters between the simulations and the measurements were less than 12%. This shows that our method is effective for fuel spray simulation.

References

References
1.
Hirt
,
C. W.
, and
Nichols
,
B. D.
, 1981, “
Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries
,”
J. Comput. Phys.
,
39
, pp.
201
225
.
2.
Sussman
,
M.
,
Smereka
,
P.
, and
Osher
,
S.
, 1994, “
A Level Set Approach for Computing Solutions to Incompressible Two-Phase Flow
,”
J. Comput. Phys.
,
114
, pp.
146
159
.
3.
Yabe
,
T.
and
Aoki
,
T.
, 1996, “
A Dream to Solve Dynamics of All Materials Together
,”
International Conference on High-Performance Computing in Automotive Design, Engineering, and Manufacturing
, Oct. 7–10,
Paris, France
, pp.
2105
2108
.
4.
Tanguy
,
S.
et al.
, 2004, “
Development D’une Methode Level Set Pour Le Suivi D’interfaces et Applications
,”
Advances in the Modeling Methodologies of Two-phase Flows
,
Lyons, France
, Paper No. 13.
5.
Tanguy
,
S.
, and
Berlemond
,
A.
, 2005, “
Application of a Level Set Method for Simulation of Droplet Collisions
,”
International Journal of Multiphase Flow
,
31
, pp.
1015
1035
.
6.
Pan
,
Y.
, and
Suga
,
K.
, 2004, “
Direct Simulation of Water Jet into Air
,”
5th International Conference on Multiphase Flow
, ICMF’04, Paper No. 377.
7.
Ishii
,
E.
,
Ishikawa
,
T.
, and
Tanabe
,
Y.
, 2006, “
Hybrid Particle/Grid Method for Predicting Motion of Micro- and Macro-free Surfaces
,”
ASME J. Fluids Eng.
,
128
, pp.
921
930
.
8.
Ishii
,
E.
Ishikawa
,
T.
, and
Tanabe
,
Y.
, 2007, “
Simulation of Liquid Jet Breakup of a Swirl-type Fuel Injector for Automobile Engines
,”
ASME
Paper No. FEDSM2007-37010.
9.
Koshizuka
,
S.
and
Oka
,
Y.
, 1996, “
Moving-Particle Semi-implicit Method for Fragmentation of Incompressible Fluid
,”
Nuclear Science in Engineering
,
123
, pp.
421
434
.
10.
Amsden
,
A. A.
,
Ramshaw
,
J. D.
,
O’Rourke
,
P. J.
, and
Dukowicz
,
J. K.
, 1985, “
KIVA: A Computer Program for Two- and Three-Dimensional Fluid Flows with Chemical Reactions and Fuel Sprays
,”
Los Alamos National Laboratory Report
, LA-10245-MS.
11.
Amsden
,
A. A.
,
O’Rourke
,
P. J.
, and
Butler
,
T. D.
, 1989, “
KIVA-II; A Computer Program for Chemically Reactive Flows and Sprays
,”
Los Alamos National Laboratory Report
, LA-11560-MS.
12.
Reitz
,
R. D.
, and
Diwakar
,
R.
, 1987, “
Structure of High-Pressure Fuel Sprays
,” SAE Paper No. 8720598.
13.
Reitz
,
R. D.
, 1987, “
Modeling Atomization Processes in High Pressure Vaporizing Sprays
,”
Atomization and Spray Technology
,
3
, pp.
309
337
.
14.
O’Rourke
,
P. J.
, and
Amsden
,
A. A.
, 1987, “
The Tab Method for Numerical Calculation of Spray Droplet Breakup
,”
SAE
Paper No. 872089.
15.
Allocca
,
L.
,
Corcione
,
F. E.
,
Fusco
,
A.
,
Papetti
,
F.
, and
Succi
,
S.
, 1994, “
Modeling of Diesel Spray Dynamics and Comparison with Experiments
,” SAE Paper No. 941895.
16.
Sukegawa
,
Y.
,
Nogi
,
T.
,
Kihara
,
Y.
, and
Furuhashi
,
T.
, 2000, “
Numerical Simulation for Mixture Formation and Combustion in Direct Fuel Injection Gasoline Engines
,” Seoul 2000 FISITA World Automotive Congress F2000A139.
17.
Kondo
,
M.
, and
Koshizuka
,
S.
, 2007, “
Suppressing Pressure Oscillation in MPS
,”
Proceedings of JSME 20th Computational Mechanics Conference
, pp.
463
464
(in Japanese).
18.
Sukegawa
,
Y.
,
Nogi
,
T.
, and
Kihara
Y.
, 2003, “
In-Cylinder Airflow of Automotive Engine by Quasi-Direct Numerical Simulation
,”
JSAE Review
,
24
(
2
), pp.
123
126
.
19.
Kawamura
,
T.
, and
Kuwahara
,
K.
, 1984, “
Computation of High Reynolds Number Flow Around a Circular Cylinder with Surface Roughness
,”
AIAA Paper
, 84-0340.
20.
Martin
,
J. C.
, and
Moyce
W. J.
, 1952, “
An Experimental Study of the Collapse of Liquid Columns on a Rigid Horizontal Plane
,”
Philosophical Transactions of the Royal Society of London
,
244
, pp.
312
324
.
21.
Kondo
,
M.
,
Koshizuka
,
S.
,
Suzuki
,
K.
, and
Takimoto
,
M.
, 2007, “
Surface Tension Model using Inter-Particle Force in Particle Method
,”
ASME
Paper No. FEDSM2007-37215.
22.
Ishii
,
E.
,
Sukegawa
,
Y.
, and
Yamada
,
H.
, 2010, “
Fuel Spray Simulation with Collision Jets for Automobile Engines
,”
ASME
Paper No. FEDSM-ICNMM2010-30098.
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