Effect of friction force determination method on results obtained from model of gas flow from combustion chamber to the crankcase

• Autorzy: Koszałka G. , Niewczas A. , Guzik M.
• Języki publikacji: EN

Abstrakty

EN

The paper presents investigation of the influence of the friction force calculation method on the results of simulations run with the use of the model ofgas flow from the combustion chamber to the crankcase and piston rings motion in the grooves. The first series of simulations was run using the gas flow and ring motion model in which the friction force was calculated from the empirical equation. The second series was run with the use of the gas flow and ring motion model fully integrated with the ring lubrication model. In that case the friction force was derived from the hydrodynamic model of ring lubrication. Comparison of the results obtained in the first and second series of simulations indicated that despite the fact that the friction forces calculated with these two methods differed considerably, the method of friction force calculation had insignificant effect. This refers to the ąuantities determined in the simulations which are most important from practical point of view - i.e. displacements of the rings in the grooves, pressure courses in inter-ring regions and blowby rate. It is not necessary to integrate the gas flow and ring motion model with the model of ring lubrication, and doing so to complicate it very much, if the aim of the calculations is simulation of blowby and rings behaviour in the grooves.

Słowa kluczowe

EN

combustion engine; blowby; piston ring; friction force; mathematical model

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2009
• Tom: Vol. 16, No. 4
• Strony: 223--239
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Koszałka G.

autor

Niewczas A.

autor

Guzik M.

• Lublin University of Technology Department of Combustion Engines and Transport Nadbystrzycka 36 Street, 20-618 Lublin, Poland tel: [phone],fax: [phone],

Bibliografia

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• [3] Koszałka. G., Modelling the blowby in internal combustion engine, Part 2: Primary Calculations and Verification of the Model, The Archive of Mechanical Engineering, Vol. LI, No. 4, pp. 595-607, 2004.
• [4] Namazian, M., Heywood, J. B., Flow in the Piston-Cylinder-Ring Crevices of a Spark-Ignition Engine, Effect on Hydrocarbon Emissions, Efficiency and Power, SAE Paper 820088, 1982.
• [5] Tian, T., Noordzij, L. B., Wong, V. W., Heywood, J. B., Modeling Piston-Ring Dynamics, Blowby and Ring-Twist Effects, Journal of Engineering for Gas Turbines and Power, Vol. 120, No. 4, pp. 843-854, 1998.
• [6] Wolff, A., Piechna, J., Numerical simulation of piston ring pack operation, The Archive of Mechanical Engineering, Vol. L, No. 3, pp. 303-329, 2003.