Macroscopic Analysis of Spray Development Using Direct Injection for Studying Ethanol Fuel Behavior

Abstract:

A great difficulty in spray analysis is the intrinsic subjectivity in the manual measurements of macroscopic spray characteristics. Within its contexts this work has the main objective to demonstrate a systematic methodology for the spray analysis adopted for acquiring the data results based on numerical criterion dealing with the numerical matrices that represent the spray images. The results shown in this work refers to EXXSOL D60 injection, a tested fluid used to simulate ethanol spray characteristics. The characteristics analyzed were spray penetration, spray pattern at various moments after start of injection and the total volume of the cone spray also as a function of time. The methodology applied uses the numerical matrices of images in different stages of injections. A computational routine written in Matlab environment deals with the numerical matrices of the spray images to localize the spray boundaries based on a numerical criterion. All the subsequent analysis is then performed with the boundaries location data in hand. The results show higher growth of penetration in the beginning of injections, higher displacements of the bottom part of the spray also in the beginning of injections and a linear growth of spray volume injected. The importance of all the results acquired in this work demonstrated that the proposed methodology is suitable for spray analysis.

• Periodical: Applied Mechanics and Materials (Volume 798)
• Pages: 229-233
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.798.229
• Online since: October 2015
• Authors: Marcio E. Guzzo*, Carlos A.J. Gomes, Roberto B.R. Costa, Ramon Molina Valle, José E.M. Barros
• Keywords: Direct Injection, Ethanol, Penetration, Spray

References

[1] Baumgarten, C. Mixture formation in internal combustion engines, Germany: Springer, 2006, 294 p.

[2] KIM, K.; KIM, D.; JUNG, Y.; BAE, C. Spray and combustion characteristics of gasoline and diesel in a direct injection compression ignition engine. FUEL, (2013).

DOI: 10.1016/j.fuel.2013.02.060

[3] SHAO, J.; YAN, Y. Digital Imaging Based of Diese Spray Characteristics. IEEE Instrumentation an Measurement Technology Confererence, Sorrento, Italy (2006).

[4] GUZZO, M. E.; COSTA, R. B. R.; JÚNIOR, C. A. G.; ROCHA, D. D.; REIS, L. M. BARROS, J. E. M. Analysis of Ethanol Spray Produced by Direct Injection into a Single Cylinder Optical Research Engine. SAE Technical Paper 2014-36-0345, (2014).

DOI: 10.4271/2014-36-0345

[5] ALEIFERIS, P. G.; PEREIRA, J. S.; ROMUNDE, Z. V.; CAINE, J.; WITH, M. Mechanisms of spray formation and combustion from a multi-hole injector with E85 and gasoline. Combustion and Flame 157, pp.735-756, (2010).

DOI: 10.1016/j.combustflame.2009.12.019

[6] Settles, G. S., 2006, Schlieren and shadowgraph techniques: visualizing phenomena in transparent media, 2 Ed. Germany Springer, 376 p.

[7] Lefebvre, A. H., 1989, Atomization and Sprays, Taylor and Francis, London.