2次元流れモデルによる水平副室付火花点火機関の流動特性 : 非燃焼の場合

概要

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To make clear the flow motion in a spark ignition engine with an unscavenged horizontal prechamber, a two-dimensional flow model is used. The distributions and time-histories of air velocity in both the prechamber and main-chamber obtained numerically are compared with the experimental results, such as the flow patterns visualized by the tuft technique and the velocity distributions measured by laser Doppler anemometry. As a result, the flow patterns calculated in the prechamber are found to be influenced considerably by the torch nozzle area. Although the flow motion in the main-chamber is also affected strongly by the torch jet, the computed velocity vector diagrams show similar flow direction to the visualized tuft patterns, and the computations of velocity distributions and timehistories are in reasonable agreement with the measured ones respectively, within only enough smaller crank-angles from TDC to be held two-dimensionality in the flow field.
東海大学の論文