Abstract
The cross flow vector, total pressure loss and microdrag maps around 1/5 scale passenger car models are visualized by flow surveys with 5-hole pitot tubes in a scale wind tunnel with a moving belt. Five passenger car shapes, that is, a notch-back, a sedan, a sedan with under floor cover, a first-back, and a wagon are examined and survey data are obtained in the cross sections in the wake, under the floor, and beside the car. These data are calculated and presented as color contour maps with the car shapes from CAD data. The survey around the car clarifies the effect of the belt movement, and that the microdrag map in the near wake can indicate the part of the body shape which produces the large portion of the drag.
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