Numerical simulation of the small vortices in the intake and compression processes of an engine

Ken Naitoh, Kunio Kuwahara, Manfred Jeschke, Egon Krause

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The turbulence-generating mechanism in the intake and compression processes of an engine with a square cylinder is investigated by performing a three-dimensional numerical simulation. Emphasis is placed on the influences of the intake turbulence and the compression effect on the TDC (Top Dead Center) turbulence. The compressible Navier-Stokes equations are solved without any explicit turbulence models. The employed numerical algorithm is an extended version of the ICE method, and the third-order upwind scheme is employed for the convective terms. The obtained computational results agree well with the experimental visualization using freon as the working fluid under the condition with a Mach number in excess of 0.5. It is shown that the drastic transition to turbulence near TDC is grasped by computations using this numerical method.

Original languageEnglish
Pages (from-to)549-558
Number of pages10
JournalJSME International Journal, Series 2: Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties
Volume35
Issue number4
Publication statusPublished - 1992 Nov
Externally publishedYes

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Vortex flow
Turbulence
Engines
Computer simulation
Engine cylinders
Turbulence models
Navier Stokes equations
Mach number
Numerical methods
Visualization
Fluids

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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AU - Kuwahara, Kunio

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AU - Krause, Egon

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N2 - The turbulence-generating mechanism in the intake and compression processes of an engine with a square cylinder is investigated by performing a three-dimensional numerical simulation. Emphasis is placed on the influences of the intake turbulence and the compression effect on the TDC (Top Dead Center) turbulence. The compressible Navier-Stokes equations are solved without any explicit turbulence models. The employed numerical algorithm is an extended version of the ICE method, and the third-order upwind scheme is employed for the convective terms. The obtained computational results agree well with the experimental visualization using freon as the working fluid under the condition with a Mach number in excess of 0.5. It is shown that the drastic transition to turbulence near TDC is grasped by computations using this numerical method.

AB - The turbulence-generating mechanism in the intake and compression processes of an engine with a square cylinder is investigated by performing a three-dimensional numerical simulation. Emphasis is placed on the influences of the intake turbulence and the compression effect on the TDC (Top Dead Center) turbulence. The compressible Navier-Stokes equations are solved without any explicit turbulence models. The employed numerical algorithm is an extended version of the ICE method, and the third-order upwind scheme is employed for the convective terms. The obtained computational results agree well with the experimental visualization using freon as the working fluid under the condition with a Mach number in excess of 0.5. It is shown that the drastic transition to turbulence near TDC is grasped by computations using this numerical method.

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