An Experimental Study on the Correlation between Spray Dispersion Area and Tip Penetration Using an Edge Detection Technique of Images Captured from Highly Pressurized Cr-Di Fuel Injection

Abstract:

A correlation between the spray tip penetration and dispersion area was investigated. Images of diesel fuel sprays from high-pressure common rail injectorwere analyzed using an edge-detecting technique. Diesel fuel sprays were injected into a pressurized spray chamber. The gas density in the spray chamber was 17.97kg/m³, which is representative of the density in a typical diesel engine when the fuel injection process starts. Consecutive images of the diesel spray were captured with a high-speed digital camera. The spray tip penetration and dispersion area according to the time when the fuel injectionprocess starts was determined. The spray dispersion area increased linearlywith the time after the fuel injection process starts.The slope of the linear correlation line between the spray dispersion area and time after start of fuel injection was steeper when the fuel injection pressure was higher. There was little effect on the slope of the linear correlation line with a change of the duration of the fuel injection time. Also, the spray dispersion area increased parabollically with the spraytip penetration.

• Periodical: Advanced Materials Research (Volume 787)
• Pages: 513-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.787.513
• Online since: September 2013
• Authors: Choong Hoon Lee
• Keywords: Diesel Spray, Edge Detection, Fuel Injection, Spray Dispersion Area, Spray Tip Penetration

References

[1] Bosch Technical Instruction, Diesel Distributor Fuel-Injection Pumps, Edition 94/95, Robert Bosch GmbH(1983).

[2] Bosch Technical Instruction, Governors for Diesel In-Line Fuel-Injection Pumps, Edition 95/96, Robert Bosch GmbH(1996).

[3] Bosch, Diesel Engine Management, 4th edition, Robert Bosch GmbH(2005).

[4] Needham J R and Whelan S, Meeting the Challenge of Low Emissions and Fuel Economy with the Ricardo 4-Valve HSDI, Autotech(1993).

[5] Bird G L, The Ford 2. 5 litre High Speed Direct Injection Diesel Engine - Its Performance and Future Possibilities, SAE paper 850262(1985).

DOI: 10.4271/850262

[6] R. J. Menne, P. J. Lawrence, R. W. Horrocks, and P. S. Robertson, 4-Valve Light-Duty DI Diesel Developments, SAE paper 941926 (1994).

DOI: 10.4271/941926

[7] Heywood, J. B., Internal Combustion Engine Fundamentals, McGraw-Hil, (1989), 491-566.

[8] Lefebvre, A. H., Atomization and Sprays, Hemisphere (1989).

[9] Schweitzer, P.H., Penetration of Oil Spray, Pennsylvania State College Bulletin, 46 (1937).

[10] Wakuri, Y., Fujii, M., Amitani, T. and Tsuneya, R., Studies of Penetration of Fuel Spray in a Diesel Engine, Bull. JSME, 3(1960), 123-130.

DOI: 10.1299/jsme1958.3.123

[11] Dent, J.C., A Basis for the Comparison of Various Experimental Methods for Studying Penetration, SAE paper No. 710571, (1971).

[12] Reitz, R.D. and Bracco, F. V., Mechanism of Atomization of a Liquid Jet, Phys. Fluids,. 25-2, (1982), 1730-1741.

DOI: 10.1063/1.863650

[13] Rife, J. and Heywood, J. B., Photographic and Performance Studies of Diesel Engine Combustion with Rapid Compression Machine, SAE paper No. 74098 (1974).

DOI: 10.4271/740948

[14] Hiroyasu, H. and Arai, M., Fuel Spray Penetration and Spray Angle in Diesel Engines, Trans. JSME, 44-385, (1980), 3208-3220.

[15] Tennison, P. J., Georjon, T.L., Farrell, P. V. and Reitz, R. D., An Experimental and numerical study of sprays from a common rail injection system for use in an HSDI Diesel engine, SAE paper 980810 (1998).

DOI: 10.4271/980810

[16] Lee, C. H., An Empirical Correlation between Spray Dispersion and Spray Tip Penetration from an Edge Detection of Visualized Images under the Flow Condition of a Solid Body Rotating Swirl, Jounral of Visualization, Vol. 11, No. 1, pp.55-62 (2008).

DOI: 10.1007/bf03181914

[17] R.J.H. Klein-Douwel, P.J.M. Frijters, L.M.T. Somers, W.A. de Boer, R.S.G. Baert, Macroscopic diesel fuel spray shadowgraphy using high speeddigital imaging in a high pressure cell, Fuel 86 (2007) 1994–(2007).

DOI: 10.1016/j.fuel.2006.11.039

[18] Paolo E. Santangelo, Characterization of high-pressure water-mist sprays: Experimental analysisof droplet size and dispersion, Experimental Thermal and Fluid Science 34 (2010) 1353–1366.

DOI: 10.1016/j.expthermflusci.2010.06.008

[19] Hiroyasu, H., Diesel Engine Combustion and its Modeling, COMODIA85, (1985), 53-75.

[20] Hiroyasu, H., Kadota, T. and Arai, M., Supp. Comments: Fuel Spray Characterization in Diesel Engines, in J. N. Mattavi and C. A. Amann (eds. ), Combustion Modeling in Reciprocating Engines, Plenum, (1980), 369-408.

DOI: 10.1007/978-1-4899-5298-1_12

[21] M. Xu, K. Nishida and H. Hiroyasu, A Practical Calculation Method for InjectionPressure and Spray Penetration inDiesel Engines, SAE Paper920624 (1992).

DOI: 10.4271/920624