Speed dependence of integrated drag reduction in turbulent flow with polymer injection

Liuzhen Ren, Haibao Hu, Luo Xie, Suhe Huang, Luyao Bao, Xiao Huang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Drag reduction is vitally important for marine applications, and a promising means of reducing the turbulent frictional drag in external flow is polymer injection. In this paper, the integrated drag reduction rate (DR) of polymer injection in turbulent flow is investigated using pressure measurements. As the inlet speed varies 1.0–3.5 m/s, the speed dependence of DR is derived, DR increases with speed at an equivalent normalized polymer flux, and a maximum value of 50.0% is obtained. It is postulated that the injected polymer interacts with the turbulence much more efficiently as the speed increases, which is similar to the drag-reducing behavior of homogeneous polymer flows. The DR performance in polymer-injected flows reported in this paper not only indicates the existence of speed dependence at moderate speeds, but also supplies the reported speed dependence in higher speed tests. Graphic abstract: [Figure not available: see fulltext.]

Original languageEnglish
Article number40
JournalExperiments in Fluids
Volume62
Issue number2
DOIs
StatePublished - Feb 2021

Fingerprint

Dive into the research topics of 'Speed dependence of integrated drag reduction in turbulent flow with polymer injection'. Together they form a unique fingerprint.

Cite this