EXPERIMENTAL INVESTIGATION OF THE EFFECT OF POLYACRYLAMIDE ADDITIVES ON FRICTION RESISTANCE WITH A FLOW IN THE GAP BETWEEN COAXIAL CYLINDERS

Aqueous polyacrylamide (I) solutions had little effect on Reynolds number (RE) and on the transition from laminar to turbulent flow. The threshold RE or threshold friction decreased with increased molecular weight and concentration of I. The effectiveness of I additive to reduce the magnitude of the turbulent flow reached a maximum at a certain shear stress corresponding to a certain molecular weight and concentration. Any further increase in shear stress was accompanied by I degradation.

• Supplemental Notes:
  • Edited translation of Politekhnicheskii Institut, Leningrad. Trudy (USSR) n313 p123-127 1970, by M. Olaechea
• Corporate Authors:

  Wright-Patterson Air Force Base

  Foreign Technology Division
  Dayton, OH  United States 
• Authors:
  • Ivanyuta, Y F
  • Khislavskaya, N G
• Publication Date: 1972-1-6

Media Info

• Pagination: 11 p.

Subject/Index Terms

• TRT Terms: Additives; Drag; Flow; Fluid dynamics; Polymers; Turbulence
• Candidate Terms: Turbulent flow
• Old TRIS Terms: Drag reduction; Polymer additives
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00034741
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FTD-HT-23-1237-71
• Files: TRIS
• Created Date: Oct 27 1972 12:00AM