A numerical simulation of the scavenging process in a two-stroke flat-piston model engine has been developed. Air enters the cylinder circumferentially, inducing a three-dimensional turbulent swirling flow. The problem was modeled as a steady-state axisymmetric flow through a cylinder with uniform wall temperature. The steady-state regime was simulated by assuming the piston head fixed at the bottom dead center. The calculation was performed employing the k–ε model of turbulence. A comparison of the results obtained for the flow field with available experimental data showed very good agreement, and a comparison with an available numerical solution revealed superior results. The effects of the Reynolds number, inlet port angles, and engine geometry on the flow and in-cylinder heat transfer characteristics were investigated. The Nusselt number substantially increases with larger Reynolds numbers and a smaller bore-to-stroke ratio. It is shown that the positioning of the exhaust valve(s) is the main parameter to control the scavenging process.
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Numerical Simulation of the Fluid Flow and Heat Transfer Processes During Scavenging in a Two-Stroke Engine Under Steady-State Conditions
M. de Castro Gouveia,
M. de Castro Gouveia
Department of Mechanical Engineering, Pontificia Universidade Cato´lica do Rio de Janeiro, 22453, Rio de Janeiro, RJ, Brazil
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J. A. dos Reis Parise,
J. A. dos Reis Parise
Department of Mechanical Engineering, Pontificia Universidade Cato´lica do Rio de Janeiro, 22453, Rio de Janeiro, RJ, Brazil
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A. O. Nieckele
A. O. Nieckele
Department of Mechanical Engineering, Pontificia Universidade Cato´lica do Rio de Janeiro, 22453, Rio de Janeiro, RJ, Brazil
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M. de Castro Gouveia
Department of Mechanical Engineering, Pontificia Universidade Cato´lica do Rio de Janeiro, 22453, Rio de Janeiro, RJ, Brazil
J. A. dos Reis Parise
Department of Mechanical Engineering, Pontificia Universidade Cato´lica do Rio de Janeiro, 22453, Rio de Janeiro, RJ, Brazil
A. O. Nieckele
Department of Mechanical Engineering, Pontificia Universidade Cato´lica do Rio de Janeiro, 22453, Rio de Janeiro, RJ, Brazil
J. Heat Transfer. May 1992, 114(2): 383-393 (11 pages)
Published Online: May 1, 1992
Article history
Received:
January 31, 1990
Revised:
July 22, 1991
Online:
May 23, 2008
Citation
de Castro Gouveia, M., dos Reis Parise, J. A., and Nieckele, A. O. (May 1, 1992). "Numerical Simulation of the Fluid Flow and Heat Transfer Processes During Scavenging in a Two-Stroke Engine Under Steady-State Conditions." ASME. J. Heat Transfer. May 1992; 114(2): 383–393. https://doi.org/10.1115/1.2911286
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