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

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概要

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• 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.

• 一般社団法人日本機械学会の論文
• 1992-11-15

著者

• Krause E

  Aerodynamisches Institut Rwth Aachen

• Jeschke Manfred

  Aerodynamisches Institut Rwth Aachen

• Kuwahara Kunio

  Institute Of Astronautical Science Jaxa

• Krause Egon

  Aerodynamisches Institut Rwth Aachen

• Naitoh K

  Nagoya Inst. Technol. Nagoya Jpn

• Naitoh Ken

  Nissan Research Center

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