STUDY OF THE CONTAINED AIR FLOW IN A RADIAL TIRE: EXPERIMENTAL

This report describes the experimental phase of a DOE-sponsored program investigating the internal air flow in a 14-inch radial tire running under load at roadway speed. The experimental apparatus used to obtain velocity profiles is described. An extensive data base was obtained and is presented. Radial traverses were made midway between the sidewalls (radial centerplane) and at stations displaced two inches towards both the inner and outer sidewalls. These traverses were made at the center of the footprint and at various angles of rotation ahead of and following the footprint. For selected cases two traverses were made, one with the anemometer probe pointing in the direction of rotation, and one with the probe reversed, so as to allow the direction of the mean velocity to be determined in the areas with high turbulence levels. In all, about 30 traverses were completed, with data obtained at radial intervals from 0.1 to 0.25 inch. For each data point, 100 measurements of the velocity components, obtained with a three-component digital hot-wire anemometer, were taken. The average and rms components were then computed. The traverses extended from the rim to within about 0.25 inch from the carcass as the probe passed through the footprint area. The data provide a very clear picture of the flow field configuration as the air in the cavity passes through the footprint region.

• Corporate Authors:

  Arvin/Calspan Advanced Technology Center

  P.O. Box 400
  Buffalo, NY  United States  14225
• Authors:
  • Skinner, G T
  • RAE, W J
• Publication Date: 1983-4

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: v.p.

Subject/Index Terms

• TRT Terms: Air; Flow; Measuring instruments; Radial ply tires
• Uncontrolled Terms: Air flow; Experimental data
• Old TRIS Terms: Radial tires
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00391692
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: 6968-A-2, HS-037 145
• Files: HSL, USDOT
• Created Date: Dec 30 1984 12:00AM