POLYMER INJECTION FOR DRAG REDUCTION

Viscous drag reduction caused by polymer injection into a developing turbulent boundary layer was investigated in a 12-inch I.D. hydraulically rough pipe. Pressure drop measurements were made in the first 200 diameters of the pipe. Velocity profile and concentration profile measurements were also taken. Drag reductions above 90 percent were realized in the inlet region for lower injection concentrations. For a given polymer injection rate, drag reduction in the inlet region was found to decrease with increasing injection concentration.

• Corporate Authors:

  Colorado State University, Fort Collins

  Fort Collins, CO  United States  80523
• Authors:
  • Tullis, J P
  • Lindeman, L F
• Publication Date: 1972-7

Media Info

• Pagination: 100 p.

Subject/Index Terms

• TRT Terms: Additives; Boundary layer; Drag; Injection molding; Pipe flow; Polymers
• Old TRIS Terms: Boundary layer theory; Drag reduction; Polymer additives; Polymer ejection systems
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00041281
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: CER72-73JPT-LFL-1
• Contract Numbers: N00014-67-A-02990013
• Files: TRIS
• Created Date: Mar 2 1973 12:00AM