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Turbulent flows in curved pipes: Recent advances in experiments and simulations
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1663-3553
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1146-3241
2016 (English)In: Applied Mechanics Review, ISSN 0003-6900, E-ISSN 1088-8535, Vol. 68, no 5, 050802Article in journal (Refereed) Published
Abstract [en]

Curved pipes are essential components of nearly all the industrial process equipments, ranging from power production, chemical and food industries, heat exchangers, nuclear reactors, or exhaust gas ducts of engines. During the last two decades, an interest on turbulent flows in such conduits has revived, probably due to their connection to technical applications such as cooling systems of nuclear reactors (e.g., safety issues due to flowinduced fatigue) and reciprocating engines (e.g., efficiency optimization through exhaust gas treatment in pulsatile turbulent flows). The present review paper, therefore, is an account on the state-of-the-art research concerning turbulent flow in curved pipes, naturally covering mostly experimental work, while also analytical and numerical works are reviewed. This paper starts with a historical review on pipe flows in general and specifically on flows through curved conduits. In particular, research dealing with the effect of curvature on transition to turbulence, work dealing with pressure losses in curved pipes, as well as turbulence statistics are summarized. The swirl-switching phenomenon, a specific structural phenomenon occurring in turbulent curved pipe flows, which has interesting fundamental as well as practical implications, is reviewed. Additional complications, with respect to flow through bends, namely, entering swirling flow and pulsating flow, are reviewed as well. This review closes with a summary on the main literature body as well as an outlook on future work that should be performed in order to tackle open questions remaining in the field.

Place, publisher, year, edition, pages
American Society of Mechanical Engineers (ASME) , 2016. Vol. 68, no 5, 050802
Keyword [en]
Cooling systems, Engines, Gases, Heat engines, Nuclear reactors, Pipe flow, Turbulence, Effect of curvature, Efficiency optimization, Exhaust gas treatment, Reciprocating engines, Switching phenomenon, Technical applications, Transition to turbulence, Turbulence statistics, Turbulent flow
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-194883DOI: 10.1115/1.4034135ScopusID: 2-s2.0-84988727200OAI: diva2:1053118

QC 20161208

Available from: 2016-12-08 Created: 2016-11-01 Last updated: 2016-12-08Bibliographically approved

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Örlü, RamisAlfredsson, P. Henrik
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