Combined hot-wire and PIV measurements of a swirling turbulent flow at the exit of a 90° pipe bend

Vester, Athanasia Kalpakli; Sattarzadeh, Sohrab S.

doi:10.1007/s12650-015-0310-1

Cited by 32 publications

(14 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the recent years, the development of particle image velocimetry (PIV) allowed to optically measure velocity fields inside complex geometries in two dimensions. Planar PIV (two components, 2C) and its stereoscopic version (three components, 3C) were used to analyse turbulent flows in 90° pipe bends and to determine the flow pattern and velocity profiles (Kalpakli and Örlü 2013;Kalpakli Vester et al 2016;Sakakibara and Machida 2012). The transient flow through a helically coiled pipe was additionally characterized by the aid of PIV (Brito et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Tomographic PIV measurements and RANS simulations of secondary flows inside a horizontally positioned helically coiled tube

et al. 2020

View full text Add to dashboard Cite

Helically coiled tubes are widely used in industry to enhance heat and mass transfer in the laminar flow regime, due to their secondary flow pattern. In this study, tomographic particle image velocimetry (tomo-PIV) is used in a horizontally coiled helical tube to systematically acquire 3C-3D velocity fields for Reynolds numbers ranging from 20 to 1400 and Dean numbers from 8 to 567. The velocity field evaluations are performed using two different approaches: time-averaged velocity field calculation from instantaneous velocity fields and velocity field determination by cross-correlation from an ensemble of instantaneous reconstructed volumes. Equivalent velocity field accuracy is achieved in both velocity approaches when the flow can be considered stationary. Moreover, numerical simulations were carried out in the same geometry at the same flow conditions and were validated against the experimental 3C-3D data sets. The simulation results show good agreement with the measured velocities, offering the possibility of parametric studies and design optimization. To the authors' best knowledge, this is the first systematic experimental investigation of a helical coil flow by means of 3C-3D velocity measurements, which results can now be used for validation of numerical models in computational fluid dynamics.

show abstract

Section: Introductionmentioning

confidence: 99%

Tomographic PIV measurements and RANS simulations of secondary flows inside a horizontally positioned helically coiled tube

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In this respect, it is also worth referring toKalpakli Vester et al (2015), where the results from a SW and PIV measurements in a rotating pipe flow are compared.…”

mentioning

confidence: 99%

Binormal cooling errors in single hot-wire measurements

Alfredsson

2016

jtam

Self Cite

View full text Add to dashboard Cite

In single-wire hot-wire measurements, velocity fluctuations acting normal to the hot-wire and its prongs will cause additional heat transfer known as binormal cooling. With respect to wall turbulence, the influence of this additional cooling is well-studied for crossed wires, while it is commonly ignored in single hot-wire measurements. The latter view is challenged in the recent work by Dróżdż and Elsner (2014) that claims significant errors in variance measurements when using single-wire probes in turbulent boundary layers. This short communication revisits these claims and quantifies binormal cooling errors through an expansion of the effective-velocity concept and utilisation of direct numerical simulation data. Results support the common habit that binormal cooling errors can safely be ignored in single hot-wire measurements.

show abstract

“…Other tests have been performed to directly measure the flow velocity fields through different velocimetry techniques such as Laser Doppler Anemometry (LDA) [53], hot-wire anemometry (HWA) [54,55] and Particle Imaging Velocimetry (PIV) [53,56,57].…”

Section: Local Inlet Flow Fieldmentioning

confidence: 99%

Experiments on turbocharger compressor acoustics

Tíscar¹

View full text Add to dashboard Cite

Parts of the work presented in this thesis have been supported by different collaboration agreements with industry partner Jaguar Land Rover Limited, Abbey Road, Whitley, Coventry CV3 4LF, UK. xvi "Good company in a journey makes the way to seem the shorter", wrote Isaak Walton back in 1653 and, certainly, I could not have wished for a better company in this journey. I would like to express my gratitude, first and foremost, to my advisor Prof. Alberto Broatch for his guidance and support in the pursuit of this research. A gratitude that I also must extend to Prof. Galindo and Dr. Navarro, not only for the development of the numerical model but for the many insightful discussions held along the development of this work. Also included in this recognition are certainly the people of the Noise Control research line, specially Prof. Torregrosa, Bernardo Planells and Josep Gómez. My sincere appreciation also goes to my colleagues at CMT-Motores Térmicos, starting with Profs. Payri and Desantes and including the professors, researchers, technicians, students, etc., with whom I shared so many good times. Special thanks as well to the administrative staff, Teresa, Amparo, Julia, for their help navigating the fearsome seas of paperwork. I also wish to thank Profs. Mats Åbom, Susann Boij and Inés López for welcoming me as a visiting researcher in the Marcus Wallenberg Laboratory at the KTH-Royal Institute of Technology, and of course to Luck, Juan Pablo, Romain, Luca, Mathieu, and the many others who offered me their hospitality in Stockholm. I am indebted as well to the people at Jaguar Land Rover with whom we have made so many fruitful collaborations. Last but not least, I wish to thank my friends and family for their everlasting support, specially my parents from whom I inherited the appreciation for mathematics and science. And finally, thank you, Paula, for sharing this journey, and those that may follow. Valencia, 2017 xvii "Hundreds of noises wove themselves into a wiry texture of sound with barbs protruding here and there, smart edges running along it and subsiding again, with clear notes splintering off and dissipating. By this noise alone, whose special quality cannot be captured in words, a man returning after years of absence would have been able to tell with his eyes shut that he was back in the Imperial Capital and Royal City of Vienna.

show abstract

Combined hot-wire and PIV measurements of a swirling turbulent flow at the exit of a 90° pipe bend

Cited by 32 publications

References 53 publications

Tomographic PIV measurements and RANS simulations of secondary flows inside a horizontally positioned helically coiled tube

Tomographic PIV measurements and RANS simulations of secondary flows inside a horizontally positioned helically coiled tube

Binormal cooling errors in single hot-wire measurements

Experiments on turbocharger compressor acoustics

Contact Info

Product

Resources

About