THE WIND TUNNEL'S GROUND PLANE BOUNDARY LAYER--IT'S INTERFERENCE WITH THE FLOW UNDERNEATH CARS

In order to determine the best way to simulate a road in the full-scale climatic wind tunnel of the Volkswagenwerk AG, a series of comparative tests between road and tunnel have been carried out. In general, a good correlation was achieved when a rigid ground plane was used for road simulation. Only a small margin for improvement by boundary-layer control remains. From measurements reported in the literature, it can be seen that an effective reduction of the boundary-layer displacement thickness of 60% can be achieved with single-slot suction. Nevertheless, this would result in a hardly noticeable improvement of test-data correlation for cars with standard ground clearance. Therefore, it was decided not to install a boundary-layer suction in the wind tunnel of Volkswagenwerk AG.

  • Supplemental Notes:
    • Report from the Automotive Congress and Exposition, 24-28 February 1975, Detroit, Michigan.
  • Corporate Authors:

    Society of Automotive Engineers

    485 Lexington Avenue
    New York, NY  United States  10017
  • Authors:
    • Hucho, W H
    • Janssen, L J
    • Schwartz, G
  • Publication Date: 1975

Media Info

  • Features: References;
  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00096930
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: SAE 750066
  • Files: TRIS
  • Created Date: Jul 15 1975 12:00AM