自動車の空気抵抗を増大させる車体周りの流れ構造 : 第2報,セダン車体の特徴的な流れ構造(流体工学,流体機械)

概要

論文の詳細を見る
The reduction of aerodynamic drag for vehicle is an important item in vehicle engineering. However, as an automobile is strongly oriented to denign, aerodynamic drag coefficient C_D must be reduced maintaining the flexibility of design. In order to do so, it is necessary to clarify the characteristic flow structure around vehicle that increases C_D. As a secondary report, this study focuses on the flows in lateral side and under-floor of vehicle to clarify the characteristic flow structure that increases C_D using a sedan type vehicle, which has greater freedom of design. As a result, the flow from front bumper and the flow blowing out from wheelhouse in lateral side were clarified to have an impact on increase of C_D. The vortices under the floor generated by a flow blowing out from engine compartment were also identified to have an impact on C_D. It was clarified that the vehicle's trailing vortices dominant against C_D enhanced as those flows/vortices enhanced and front pillar vortices above trunk deck also enhanced (clarified in the initial report).
社団法人日本機械学会の論文
2009-09-25