Numerical Simulation of the Small Vortices in the Intake and Compression Processes of an Engine

Ken Naitoh; Kunio Kuwahara; Manfred Jeschke; Egon Krause

doi:10.1299/kikaib.57.2719

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 journal › Article › peer-review

Abstract

The turbulence-generation 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 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 agreed well with the experimental visualization using freon as the working fluid under the Mach-number condition over 0.5. It is shown that the drastic transition to turbulence near TDC is grasped by computations using this numerical method.

Original language	English
Pages (from-to)	2719-2726
Number of pages	8
Journal	Transactions of the Japan Society of Mechanical Engineers Series B
Volume	57
Issue number	540
DOIs	https://doi.org/10.1299/kikaib.57.2719
Publication status	Published - 1991
Externally published	Yes

Keywords

Internal Combustion Engine
Numerical Analysis
Turbulence

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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abstract = "The turbulence-generation 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 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 agreed well with the experimental visualization using freon as the working fluid under the Mach-number condition over 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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AU - Naitoh, Ken

AU - Kuwahara, Kunio

AU - Jeschke, Manfred

AU - Krause, Egon

PY - 1991

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N2 - The turbulence-generation 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 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 agreed well with the experimental visualization using freon as the working fluid under the Mach-number condition over 0.5. It is shown that the drastic transition to turbulence near TDC is grasped by computations using this numerical method.

AB - The turbulence-generation 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 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 agreed well with the experimental visualization using freon as the working fluid under the Mach-number condition over 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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