Skip to main content
SpringerLink
Log in

A study of the mixture formation process of a diesel spray under phase change

  • Published:
Journal of Mechanical Science and Technology Aims and scope Submit manuscript

Abstract

The purpose of this study was to analyze the structure and to clarify the mixture formation process within evaporative diesel spray. Liquid fuel was injected from a single-hole nozzle (l/d=1.0mm/0.2mm) into a constant-volume vessel under high pressure and temperature in order to visualize the spray phenomena. An exciplex fluorescence method was applied to the evaporative fuel spray to measure and investigate both the liquid and the vapor phase of the injected spray. The region of interest in this experiment was downstream towards the end of the spray. For accurate investigation, images of the liquid and vapor phase regions were recorded with a 35mm still camera and CCD camera, respectively. For the case of the evaporative fuel spray, the images showed that within the region of liquid phase very small droplets could be found outside of the spray and larger droplets at the spray’s tip. This can be explained through the droplet classification defined byStokes number (stk) (Chung et al., 1990). From the 2-dimensional analysis results of the heterogeneous distribution of the inner spray, a 3-dimensional analysis was attempted by using the offset incidence of the laser beam from the spray’s center axis. Finally, in order to quantify the mixture’s state change within the vapor phase region of the injected spray, images analysis were carried out based on the entropy of statistical thermodynamics.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Abbreviations

I:

Fluorescence Intensity

I(i):

Fluorescence Intensity Value of Each Pixel

M:

Number of Total Pixels

S:

Dimensionless Entropy

t:

Time from Injection Start

X:

Mole Fraction

ρ:

Density

μ:

Viscosity

A:

Ambient gas

inj:

Injection

liq:

Liquid Phase

N2 :

Nitrogen

max:

Maximum

vap:

Vapor Phase

References

  • Azetsu, A., Dodo, S., Someya, T. and Oikawa, C., 1990, “A Study on the Structure of Diesel Spray(2-D Visualization of the Non-Evaporating Spray),”CO-MODIA 90, pp. 199–204.

  • Chikahisa, T., Kikuta, K. and Hishinuma, Y., 1999, “Relationship between Fuel Cloud Size and Turbulence Scales for Quick Mixing in Two-Stage Combustion Process,”RC151 Report, pp. 194–201.

  • Choi, D. S., Kim, D. J. and Hwang, S. C., 2000, “Development Behavior of Vaporizing Sprays From a High-Pressure Swirl Injector Using Exciplex Fluorescence Method,”KSME International Journal, Vol. 14, No. 10.

  • Chung, J. N., Troutt, T. R. and Crowe, C. T., 1990, “Modeling of Droplet-Gas Interaction in a Spray Combustion Engine,”COMODIA 90, pp. 601–605.

  • Dan, T., Takagishi, S., Ohishi, K., Senda, J. and Fujimoto, H., 1996, “Effect of Ambient Gas Viscosity on the Structure of Diesel Fuel Spray,”JSME(part2), Vol. 62, No. 95-1526, pp. 2867–2873, (in Japanese).

    Google Scholar 

  • Ely, J. F. and Huber, M. L., 1992, “NIST(National Institute of Standard and Technology) Thermophysical Properties of Hydrocarbon Mixtures Database (SUPER-TRAPP) Version 1.0 User’s Guide,”National Institute of Standards and Technology.

  • Kim, T. W. and Ghandhi, J. B., 2003, “Quantitative Vapor Phase Exciplex Fluorescence Measurements at High Ambient Temperature and Pressure,”KSME International Journal, Vol.17, No.1.

  • Kosaka, H., Won, Y. H. and Kamimoto, T., 1992, “A Study of the Structure of Diesel Sprays Using 2-D Imaging Techniques,”SAE Paper, No. 920107.

  • Levich, V. G., 1974,Physicochemical Hydrodynamics,Prentice-Hall, pp. 639.

  • Melton, L. A., 1983, “Spectrally Separated Fluorescence Emissions for Diesel Fuel Droplets and Vapor,”Applied Optics, Vol. 21, No. 14, pp. 2224–2226.

    Article  Google Scholar 

  • Nakayama, Y., 1994,Hydrodynamics, YOKENDO, pp. 80–82.

  • Siebers, D. L., 1998, “Liquid-Phase Fuel Penetration in Diesel Sprays,”SAE paper, No. 980809.

  • Siebers, D. L., 1999, “Scaling Liquid-Phase Fuel Penetration in Diesel Sprays Based on Mixing-Limited Vaporization,”SAE paper, No. 99010528.

Download references

Author information

Authors and Affiliations

  1. Division of Mechanical Engineering, Dong-A University, 604-714, Busan, Korea

    Jeongkuk Yeom, Jongsang Park, Sipom Kim, Jongyul Ha & Sungsik Chung

  2. Department of Automobile Engineering, Tongmyong University, 608-711, Busan, Korea

    Joongsoon Lee

Authors
  1. Jeongkuk Yeom
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Jongsang Park
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Sipom Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Jongyul Ha
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Sungsik Chung
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Joongsoon Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Jeongkuk Yeom.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Yeom, J., Park, J., Kim, S. et al. A study of the mixture formation process of a diesel spray under phase change. J Mech Sci Technol 21, 1120–1128 (2007). https://doi.org/10.1007/BF03027662

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF03027662

Keywords

Search

Navigation