A NOTE ON BLOCKAGE EFFECT

It has been found, both experimentally from wind-tunnel measurements and flow observations, and analytically, from potential-flow and boundary-layer calculations with the surface of the separation bubble replaced by a solid boundary, and also from a mathematical model of the wake, that the back pressure in the wake is very sensitive to the presence and spacing of channel walls. On the basis of these results an approximate formula is proposed as a blockage correction for viscous pressure drag associated with flow separation. (Author)

• Corporate Authors:

  University of Iowa, Iowa City

  Iowa Institute of Hydraulic Research, 300 South Riverside Drive
  Iowa City, IA  United States  52242-1585
• Authors:
  • Landweber, L
• Publication Date: 1970

Media Info

• Pagination: 5 p.

Subject/Index Terms

• TRT Terms: Boundary layer separation; Channel flow; Wakes
• Uncontrolled Terms: Blockage
• Old TRIS Terms: Narrow channel flow; Wake analysis
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00024783
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: ITHR-Reprint-277
• Contract Numbers: N00014-68-A-01960004
• Files: TRIS
• Created Date: Jan 14 1972 12:00AM