The Optimization of Body Details-A Method for Reducing the Areodynamic Drag of Road Vehicles

Wind Tunnel Experiments on Reducing Separated Flow Region Around Front Ends of Vehicles on Meter-Gauge Railway Lines

“…These conclusions are consistent with the results published previously [2], [3]. We have been studying the effects of other aerodynamic attachments such as fins on the prevention of flow separation, and thus the results will be presented in the near future.…”

“…A considerable amount of research work on separated flow around the front-end edges of bluff bodies such as buses and trucks has been carried out, mainly with the aim of reducing aerodynamic drag [1][2][3][4]. It is known from the above results that (a) if the length of rounded edges at the front ends is greater than approximately 10% of the width or height of a bluff body, flow separation can be effectively prevented; (b) as the Reynolds number becomes larger, the minimum length of the rounded edges required to prevent flow separation decreases to several percent of the width or height of a bluff body; and (c) roundededge shapes with a smaller radius of curve on the upstream side and a larger one on the downstream side are effective in preventing flow separation.…”

The Aesthetics of Low Drag Vehicles

“…This technique of the optimisation of body details, as described by Hucho et al in 1976 [35,36], has become the standard approach to the development of series production cars by the aerodynamics departments of most automotive OEMs worldwide. The process involves systematic changes in shape with results plotted against geometrical modifications.…”

Fundamental Study of Aerodynamic Drag Reduction for Vehicle with Feedback Flow Control

“…Conventionally, aerodynamic drag has been reduced by designing a body shape. Lay pointed out the importance of streamlining the body shape through wind tunnel experiments (2) , while Hucho et al reported the effect of the body detail (3) . Recently computational fluid dynamics (CFD) has been applied to the aerodynamic design of body shape.…”