Understanding the disintegration mechanism, spray penetration, and spray motion is of great importance in the design of a high quality diesel engine. The atomization process that a liquid would undergo as it is injected into a high-temperature, high-pressure air, is investigated in this work. The purpose of this study is to gain further insight into the atomization mechanism, the variation over time in droplet size distribution and spray penetration. This is done based on effect of chamber pressure, injection pressure, and type of fuel. A laser diffraction method is used to determine droplet mean diameters, single injection with synchronized time mechanism allowed the time dependent studies. Obscuration signals are obtained through a digital oscilloscope from which arrival time of spray can be measured. The spray penetration correlation obtained is compared to other correlation’s obtained from different other techniques used in the literature.

1.
Reitz
R. D.
, and
Bracco
F. V.
,
1979
, “
Ultra-High-Filming of Atomizing Jets
.”
Physics of Fluids
,
22
(
6
), pp.
1054
1064
.
2.
Borodin
V. A.
, and
Yagodkin
V. I.
,
1967
,
J. of Appl. Mech. Tech. Phys.
8
,
46
46
.
3.
Levich, V.G., 1962, “Physiochemical Hydrodynamics, “Prentice Hall Englewood Cliffs, New Jersey.
4.
Castleman
R. A.
,
1931
, “
The Mechanism of Atomization of Liquids
,”
Nat. Bur. Stand J. Research
,
7
, pp.
269
376
.
5.
DeJuhasz
K. J.
,
1931
, “
Dispersion of Sprays in Solid Injection Oil Engines
,”
Trans. ASME (OGP)
,
53
,
65
65
.
6.
Schweitzer
P. H.
,
1937
, “
Mechanism of Disintegration of Liquid Jets
,”
J. Applied Physics
, Vol.
8
, pp.
513
513
.
7.
Bergwerk
W.
,
1959
, “
Flow Pattern in Diesel Nozzle Spray Holes
,”
Proc. Inst. Mech. Engrs.
Vol.
173
, pp.
655
655
.
8.
Rupe
J. H.
,
1962
, “
On the Dynamic Characteristics of Free-Liquid Jets and a Partial Correlation with Orifices Geometry
.”
JPL Tech. Report
No.
32
, pp.
207
207
.
9.
Harrington, D.L., 1984, “Analysis of Spray Penetration and Velocity Dissipation for Non-Steady Fuel Injection,” ASME paper No. 84-D6P-14.
10.
Heywood, J.B., 1998, “Internal Combustion Engine Fundamentals,” McGraw-Hill, New York.
11.
Faeth
G. M.
,
1983
, “
Evaporation and Combustion of Sprays
,”
Prog. Ener. Combust. Sci.
, Vol.
9
, pp.
1
76
.
12.
Jawad, B., Gulari, Es., and Henein, N.A., 1992, “Characteristics of Intermittent Fuel Sprays,” Combustion and Flame, pp. 384–396.
13.
Swithenbank
J.
,
Beer
J. M
,
Taylor
D. S.
, and
McCreath
,
1977
, “
A Laser Diagnostic Technique for the Measurement of Droplet and Particle Size Distributions
,” G.C.,
Prog. Astronaut
. Vol.
54
, pp.
421
421
.
14.
Hay, N., and Jones, P.L., 1972, “Comparison of the Various Correlations for Spray Penetration,” SAE, paper No. 720776.
15.
Schweitzer
P. H.
,
1938
, “
Penetration of Oil Sprays
,”
Journal of Applied Physics
, Vol.
9
, No.
12
, pp.
735
741
.
16.
Schweitzer
P. H.
,
1937
, “
Mechanism of Disintegration of Liquid Jets
,”
J. Applied Physics
, Vol.
8
, pp.
513
521
.
17.
Hiroyasu, H., Kadota, T., and Arai, M., 1978, “Supplementary Comments: Fuel Spray Characterization in Diesel Engines, Proceedings of the symposium on Combustion Modeling in Reciprocating Engines, General Motors Research Center, MI, pp. 369–408.
18.
Taylor
D. H.
, and
Walsham
B. E.
,
1970
, “
The Analysis of Fuel Sprays Penetration and Distributions in a Medium Speed Diesel Engine Using Optical Technique
,”
Diesel Engine Combustion Proc, Inst. Mech. Engrs.
, Vol.
184
, pp.
67
76
.
19.
Dent, J.C., 1971, “A Basis for the Comparison of Various Experimental Methods for Studying Spray Penetration.” SAE, paper No. 710571.
20.
Chiu, W.S., Shahed, S.M., and Lyn, W.T., 1976, “A Transient Spray Mixing Model for Diesel Combustion.” SAE, paper No. 830448.
21.
Varde, K.S., and Popa, D.M., 1983, “Diesel Spray Penetration at High Injection Pressures.” SAE, paper No. 830448.
22.
Takeuchi, K., Senda, J., Shikuya, M, and Masayuki. M., 1983. “Transient Characteristics of Fuel Atomization and Droplet Size Distribution in Diesel Fuel Sprays.” SAE paper 830449.
23.
Felton, P.G., 1979, “Measurement of Particle or Droplet Size Distribution by Laser Diffraction,” Proc. Analyst. Div. Chem. Soc.: Lasers and their Analytical Applications.
24.
Yule
A. J.
,
Ah Seng
C.
,
Felton
P. G. Aungut
, and
Chigier
N. A.
,
1982
A Study of Vaporizing Fuel Sprays by Laser Techniques
.”
Combustion and Flame
Vol.
44
, pp.
71
84
.
25.
Tishkoff, J.M., 1982, “Measurements of Particle Size and Velocity in a Fuel Spray,” ICLASS GMR - 3892
26.
Arai, M. Tabata, M., Hiroyasu, H., Shimizu, M., 1984 “Disintegration Process and Spray Characterization of Fuel Jet Injected by a Diesel Nozzle,” SAE, paper No. 840275.
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