Experimental Investigation of the Effect of Polyacrylamide Additives on Friction Resistance with a Flow in the Gap between Coaxial Cylinders,

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Abstract:

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. Author

Author(s):
Ivanyuta, Yu. F. ; Khislavskaya, N. G.
Author Organization(s):
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Supplementary Note:
Edited trans. of Politekhnicheskii Institut, Leningrad. Trudy (USSR) n313 p123-127 1970, by M. Olaechea.
Annotation:
Experimental Investigation of the Effect of Polyacrylamide Additives on Friction Resistance with a Flow in the Gap between Coaxial Cylinders--Translation.
Pagination:
0011

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FTD-HT-23-1237-71
Project Number(s):
AF-7343
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*SKIN FRICTION, REDUCTION), (*POLYAMIDE PLASTICS, FLUID FLOW), SHEAR STRESSES, LAMINAR FLOW, USSR, DRAG, ADDITIVES, SOLUTIONS(MIXTURES), WATER, REYNOLDS NUMBER, TURBULENCE
Field(s)/Group(s):
Fluid Mechanics
Keyword(s):
POLYACRYLAMIDES, TRANSLATIONS, TURBULENT FLOW, *DRAG REDUCING POLYMERS
Report Date:
1972 Jan 06