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Flow, Turbulence and Combustion

, Volume 82, Issue 3, pp 317–337 | Cite as

Turbulent Flow Produced by Piston Motion in a Spark-ignition Engine

  • V’yacheslav AkkermanEmail author
  • Mikhail Ivanov
  • Vitaly Bychkov
Article

Abstract

Turbulence produced by the piston motion in spark-ignition engines is studied by 2D axisymmetric numerical simulations in the cylindrical geometry as in the theoretical and experimental work by Breuer et al. (Flow Turbul Combust 74:145, 2005). The simulations are based on the Navier–Stokes gas-dynamic equations including viscosity, thermal conduction and non-slip at the walls. Piston motion is taken into account as a boundary condition. The turbulent flow is investigated for a wide range of the engine speed, 1,000–4,000 rpm, assuming both zero and non-zero initial turbulence. The turbulent rms-velocity and the integral length scale are investigated in axial and radial directions. The rms-turbulent velocity is typically an order-of-magnitude smaller than the piston speed. In the case of zero initial turbulence, the flow at the top-dead-center may be described as a combination of two large-scale vortex rings of a size determined by the engine geometry. When initial turbulence is strong, then the integral turbulent length demonstrates self-similar properties in a large range of crank angles. The results obtained agree with the experimental observations of Breuer et al. (Flow Turbul Combust 74:145, 2005).

Keywords

Spark-ignition (SI) engine Piston motion Direct numerical simulations 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • V’yacheslav Akkerman
    • 1
    • 2
    • 3
    • 4
    Email author
  • Mikhail Ivanov
    • 1
    • 2
    • 3
  • Vitaly Bychkov
    • 1
  1. 1.Department of PhysicsUmea UniversityUmeaSweden
  2. 2.Nuclear Safety Institute of Russian Academy of SciencesMoscowRussia
  3. 3.Department of Physics and Power EngineeringMoscow Institute of Physics and TechnologyDolgoprudny, Moscow RegionRussia
  4. 4.Center for Turbulence ResearchStanford University/NASA Ames Research CenterStanfordUSA

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