This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of the Injector Nozzle Hole Diameter and Number on the Spray Characteristics and the Combustion Performance in Medium-Speed Diesel Marine Engines
Technical Paper
2005-01-3853
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Experiments and numerical simulations have been carried out to investigate the NOx formation and fuel consumption according to various fuel injection nozzle geometry in medium-speed marine diesel engines. The spray visualization was performed experimentally in a constant-volume high-pressure chamber to verify numerical simulation results on the spray characteristics of the spray angle. A time-resolved spray behavior was captured by high-speed digital camera. We modified the coefficient in the correlation of spray penetration suggested by Hiroyasu et al.[1] and the f(T) of the correlation of spray angle suggested by Reitz et al.[2][3] The behavior of spray and combustion phenomena in diesel engine was examined by FIRE code. Wave breakup model and Zeldovich model were adopted to describe the atomization characteristics and the NOx formation. In case of breakup model, we modified the model constant C2 with respect to breakup time and spray angle as a function of mean density of the combustion chamber to consider the variation of density for the combustion duration. The fuel injection rate was also measured by Rig-test to use as an input data for the combustion analysis. The combustion analysis results for the given nozzle configurations were verified with the experimental data such as the cylinder pressure, RoHR(Rate of Heat Release) and the NOx formation through adjustment of some model constants at 50 and 100% load. Finally, we investigated the effects of fuel injection nozzles on the engine performance through the NOx vs. fuel consumption trade-off curves.
Recommended Content
Authors
Topic
Citation
Kim, B., Yoon, W., Ryu, S., and Ha, J., "Effect of the Injector Nozzle Hole Diameter and Number on the Spray Characteristics and the Combustion Performance in Medium-Speed Diesel Marine Engines," SAE Technical Paper 2005-01-3853, 2005, https://doi.org/10.4271/2005-01-3853.Also In
References
- Hiroyasu, H. Kadota, T. “Development and Use of a Spray Combustion Modeling to Predict Diesel Engine Efficiency and Pollutant Emission part 1: Combustion Modeling:” Bulletin of JSME 26 214 1983
- Reitz, R.D. Diwakar, R. “Structure of High-Pressure Fuel Sprays,” SAE paper 870598 1987
- Reitz, R.D. Bracco, F.B. “On the Dependence of Spray Angle and Other Spray Parameters on Nozzle Design and Operating Conditions,” SAE paper 790494 1979
- Reitz, R. D. “Modeling Atomization Processes in High-Pressure Vaporizing Sprays” Atomization and Spray Technology 3 309 337 1987
- Naber, J.D. Reitz, R.D. “Modeling Engine Spray/Wall Impingement,” SAE Technical paper 880107 1988
- Sarre, C.K. Kong, S.C. Reitz, R.D. “Modeling the Effects of Injector Nozzle Geometry on Diesel Sprays,” SAE Technical paper series 1999-01-0912 1999
- Wakisaka, T. Shimamoto, Y. Isshiki, Y. Akamatsu, S. Ibaraki, K. “Improvement in a droplet breakup model for numerical analysis of fuel sprays” JSAE Review 18 3 10 1997
- Schiller, L. Naumann, A. Z. VDI 77 318 320 1933
- Liu, A.B. Reitz, R.D. “Mechanisms of Air-Assisted Liquid Atomization” Atomization and Sprays 3 1993 55 75
- Liu, A.B. Mather, D. Reitz, R.D. “Modeling the Effects of Drop Drag and Breakup on Fuel Sprays” SAE paper 930072 1993
- Senda, J. Kobayashi, M. Iwashita, S. Fujimoto, H. “Modeling on Diesel Spray Impinging on Flat Wall,” Int. symposium COMODIA 94 1994 411 416
- Senda, J. Kobayashi, M. Iwashita, S. Fujimoto, H. “Modeling of Diesel Spray Impingement on a Flat Wall,” SAE paper 941894 1994
- Magnussen B.F. Hjertager B.H. “On Mathematical Modeling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion” Sixteenth International Symposium on Combustion 1977
- Dukowicz, J.K. “Quasi-steady droplet change in the presence of convection, informal report Los Alsmos Scientific Laboratory,”
- Dukowicz, J.K. “A Particle-Fluid Numerical Model for Liquid Sprays,” J. Comp. Physics 35 1980 229 253
- Theobald, M.A. Cheng, W.K. “A Numerical Study of Diesel Ignition,” Energy-sources technology conference and exhibition 1987
- Gosman, A. D. Ioannides, E. “Aspects of Computer Simulation of Liquid-Fueled Combustors” AIAA 81 323 1981
- Chmela, F. Orthaber, G. “Rate of Heat Release Prediction for Direct Injection Diesel Engines Based on Purely Mixing Controlled Combustion” SAE Detroit 1999
- Cheng, W. Gentry, R. “Effects on Charge Non-Uniformity on Diesel Heat Release Analysis,” SAE paper 861568 1986