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KSME Journal

, Volume 8, Issue 3, pp 241–247 | Cite as

Vaporization characteristics of the alcohol-fueled spark ignition engine

  • Sung Bin Han
  • Sung Soo Mun
  • Songyol Lee
Article
  • 154 Downloads

Abstract

Alcohol fuels have been considered for use as automotive fuel since two energy crises in the 1970's, but they have a defect of high latent heat of vaporization. Therefore, in order to improve vaporization of methanol, the authors have made the fuel vaporizing device with which to heat the mixture and eliminate the fuel film flow. This paper is a study on the characteristics of vaporization and engine performance acoording to the change of heating water temperature by means of the fuel vaporizing device. The study shows that as the vaporization of mixture improves, the mixture of methanol becomes homogenized and the fuel film flow decreases, which results in the increase of vaporization rate. And the increase of the vaporization rate improves the engine performance of the alcohol-fueled spark ignition engine.

Key Words

Vaporization Rate Droplet Liquid Film Flow of Vapor Fuel Vaporizing Device Equivalence Ratio 

Nomenclature

Aa

Area per unit length

Am

Area per unit length mesh

Cp

Specific heat at constant pressure

D

Diameter of inlet pipe

d

Diameter of a mesh inlet pipe

Gf

Mixture flow of vapor

Gs

Mixture flow of droplet

Gw

Mixture flow of liquid

h

Heat transfer coefficient

K

Thermal conductivity

La

Length of the FVD

M

Mass

N

Engine speed

Pr

Prandtl number

Q

Heat transfer rate

Qh

Heat quantity of mixture

Raf

Air fuel ratio

Re

Reynolds number

T

Temperature

Tb

Bulk temperature

Tw

Wall temperature

Vd

Displacement volume

V

Velocity

Xe

Vaporization rate

γ

Specific weight

δ

Interval of a mesh

ηυ

Volumetric efficiency

θ

Crank angle

ρa

Density of air

ϕ

Equivalence ratio

ρ

Density

Subscripts

a

Air

f

Fuel

i

i'th component

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References

  1. Baines, T. M., Smith, L. R. and Urban, C. M., 1982, “Regulated Exhaust Emission from Methanol-Fueled Cars,” SAE Paper No. 820967, pp. 3171–3180.Google Scholar
  2. Bechtold, R. and Pullman, J. B., 1980, “Driving Cycle Economy, Emissions and Photochemical Reactivity Using Alcohol Fuels and Gasoline,” SAE Paper 800260.Google Scholar
  3. Hagen, D. L., 1977, “Methanol as a Fuel: Review with Bibliography,” SAE Paper 770792, pp. 2764–2796.Google Scholar
  4. Han, S. B., Mun, S. S., Lee, N. H., Lee, J. T. and Lee, S. Y., 1993, “Characteristics of the Engine Performance of the Methanol Fueled Spark Ignition Engine by the Fuel Vaporizing Device,” Tenth International Symposium on Alcohol Fuels.Google Scholar
  5. Harrington, J. A., Shishu, R. C. and Asik, J. R., 1974, “A Study of Ignition System Effects on Power, Emission, Lean Misfire Limit and EGR Tolerance of Single-Cylinder Engine-Multiple Spark Versus Conventional Single Cylinder Spark Ignition,” SAE Paper 740188, pp. 837–845.Google Scholar
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  7. Mun, S. S., Han, S. B. and Lee, S. Y. 1986. “A Study on the Characteristics of Vaporization Using Fuel Vaporizing Device in a Methanol Fueled Spark Ignition Engine.” In Proceedings of the KSME Spring Annual Meeting, pp. 394–397 in Korea.Google Scholar
  8. Samaga, B. S. and Kumar, Y. S., 1986, “Performance St Studies on a Methanol-Fueled Stratified Charge Combustion Engine,” In Proceedings of the VII International Symposium on Alcohol Fuels, pp. 142–147.Google Scholar
  9. Schweikert, J. F., 1976, ”Emission Control with Lean Mixture,” SAE Paper 760226, pp. 1041–1055.Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers (KSME) 1994

Authors and Affiliations

  • Sung Bin Han
    • 1
  • Sung Soo Mun
    • 2
  • Songyol Lee
    • 2
  1. 1.Department of Mechanical EngineeringInduk Institute of DesignSeoulKorea
  2. 2.Department of Mechanical EngineeringSung Kyun Kwan UniversitySuwon City, Kyounggi-DoKorea

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