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5. CONCLUSIONS

 

The research reported here clarified the following:

(1) Heat flux on combustion chamber walls can be predicted using numerical analysis of flow and combustion in the cylinders of slow speed 2-stroke diesel engines

(2) It was found that the time differentiation value of estimated heat flux for the cylinder cover was in good agreement with measured wall temperature, with the result that wall temperature can now be predicted.

(3) Estimation of heat flux on the piston remains insufficient, and efforts should be made to improve the prediction accuracy of flame behavior.

 

REFERENCES

 

[1] A.A. Amsden, "KIVA-3:A KIVA Program with Block-Structured Mesh for Complex Geometries", Los Alamos National Laboratory Report, LA-12503-MS, (1993)

[2] A.A.Amsden,"KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves". Los Alamos National Laboratory Report, LA-13313-MS, (1997)

[3] Z. Han and R.D. Reitz, "Turbulence Modeling of Internal Combustion Engines Using RNG k-ε Models," Comb. Sci. Tech. 106,207(1995)

[4] Reitz, R. D., "Modeling Atomization Processes in High Pressure Vaporizing Sprays. "Atomization and Spray Technology, 3, (1987), p.309.

[5] Hiroyasu, Trans of JSME (Japanese), vol.21, (1980)

[6] Naber, J. D. and Reitz, R. D., "Modeling Engine Spray/Wall Impingement", (1988), SAE Paper 880107

[7] T. Wakisaka, Y. Shimamoto, Y. Issiki, T. Noda, A. Matsui, S. Akamatsu, "Numerical Analysis of Spray Phenomena in Fuel Injection Engines", COMODIA94, (1994), p403.

[8] Livengood, J.C. and Wu, P.C., Proc. 5th Symp.(Int.) on Combustion, (1955), p.45.

[9] T. Wakisaka, "Modeling for fuel spray", JSME engine system division RC 133 report (not open to the public), (1998)

[10] J. Abraham, F.V. Bracco, R.D. Reitz, "Comparison of Computed and Measured Premixed Charge Engine Combustion.", Combustion and Flame, 60, (1985), p309.

[11] B.E. Launder and D.B. Spalding, Computer Methods in Applied Mechanics and Engineering 3, (1974), p.269.

[12] Ikegami, K, Hida, M. and Nishiwaki, K., "Computational Fluid Dynamic Predictions of Heat Transfer to the Combustion-Chamber Walls of Diesel Engines," JSME Trans. Vol.57, No.534B, (1991), pp.348-353

 

 

 

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