X-ray computed tomography of cavitating flow in a converging-diverging nozzle

Saad Jahangir; Evert Wagner; Rob Mudde; Christian Poelma

doi:10.1115/1.861851_ch209

X-ray computed tomography of cavitating flow in a converging-diverging nozzle

Saad Jahangir, Evert Wagner, Rob Mudde, Christian Poelma

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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Abstract

Cavitation is a complex multiphase phenomenon, where the production of vapor bubbles leads to opaqueness of the flow. While it is nearly impossible to visualize the interior of the cavitation region with visible light, we show that with X-ray computed tomography it is possible to obtain the time-averaged void fraction distribution in an axisymmetric converging-diverging nozzle (venturi). This technique is based on the amount of energy absorbed by the material, based on its density and thickness. Time-averaged 3D reconstruction of the X-ray images is used (i) to distinguish between vapor and liquid phase, (ii) to get radial geometric features of the flow, and (iii) to quantify the local void fraction. The results show the presence of intense cavitation at the walls of the venturi, and the vapor fraction decreases downstream of the venturi with the vapor cloud.

Original language	English
Title of host publication	Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Editors	Joseph Katz
Place of Publication	New York, NY, USA
Publisher	ASME
Pages	1104-1108
ISBN (Electronic)	978-0-7918-6185-1
DOIs	https://doi.org/10.1115/1.861851_ch209
Publication status	Published - 2018
Event	CAV2018: 10th International Symposium on Cavitation - Baltimore, United States Duration: 14 May 2018 → 16 May 2018

Conference

Conference	CAV2018: 10th International Symposium on Cavitation
Country/Territory	United States
City	Baltimore
Period	14/05/18 → 16/05/18

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care

Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

venturi
X-ray computed tomography
cloud cavitation

Access to Document

10.1115/1.861851_ch209Licence: Unspecified

PaperFinal published version, 3.3 MB

Complete dataset for Converging-Diverging Nozzle
Jahangir, S. (Creator), Hogendoorn, W. J. (Creator) & Poelma, C. (Creator), TU Delft - 4TU.ResearchData, 14 Sept 2018
DOI: 10.4121/UUID:A8A8EECD-C9AC-4699-B01D-98F3393713C9
Dataset/Software: Dataset
X-ray dataset for cavitating Converging-Diverging Nozzle
Jahangir, S. (Creator), Wagner, E. C. (Creator), Mudde, R. F. (Creator) & Poelma, C. (Creator), TU Delft - 4TU.ResearchData, 9 Jul 2020
DOI: 10.4121/UUID:1C4FDB71-94ED-4E24-A80E-2FEC718C78C1
Dataset/Software: Dataset

Cite this

@inproceedings{579c7b20f3384c1d91c762edc7a77798,

title = "X-ray computed tomography of cavitating flow in a converging-diverging nozzle",

abstract = "Cavitation is a complex multiphase phenomenon, where the production of vapor bubbles leads to opaqueness of the flow. While it is nearly impossible to visualize the interior of the cavitation region with visible light, we show that with X-ray computed tomography it is possible to obtain the time-averaged void fraction distribution in an axisymmetric converging-diverging nozzle (venturi). This technique is based on the amount of energy absorbed by the material, based on its density and thickness. Time-averaged 3D reconstruction of the X-ray images is used (i) to distinguish between vapor and liquid phase, (ii) to get radial geometric features of the flow, and (iii) to quantify the local void fraction. The results show the presence of intense cavitation at the walls of the venturi, and the vapor fraction decreases downstream of the venturi with the vapor cloud.",

keywords = "venturi, X-ray computed tomography, cloud cavitation",

author = "Saad Jahangir and Evert Wagner and Rob Mudde and Christian Poelma",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.; CAV2018: 10th International Symposium on Cavitation ; Conference date: 14-05-2018 Through 16-05-2018",

year = "2018",

doi = "10.1115/1.861851_ch209",

language = "English",

pages = "1104--1108",

editor = "Joseph Katz",

booktitle = "Proceedings of the 10th International Symposium on Cavitation (CAV2018)",

publisher = "ASME",

address = "United States",

}

Jahangir, S, Wagner, E , Mudde, R & Poelma, C 2018, X-ray computed tomography of cavitating flow in a converging-diverging nozzle. in J Katz (ed.), Proceedings of the 10th International Symposium on Cavitation (CAV2018). ASME, New York, NY, USA, pp. 1104-1108, CAV2018: 10th International Symposium on Cavitation, Baltimore, Maryland, United States, 14/05/18. https://doi.org/10.1115/1.861851_ch209

X-ray computed tomography of cavitating flow in a converging-diverging nozzle. / Jahangir, Saad; Wagner, Evert ; Mudde, Rob et al.
Proceedings of the 10th International Symposium on Cavitation (CAV2018). ed. / Joseph Katz. New York, NY, USA: ASME, 2018. p. 1104-1108.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - X-ray computed tomography of cavitating flow in a converging-diverging nozzle

AU - Jahangir, Saad

AU - Wagner, Evert

AU - Mudde, Rob

AU - Poelma, Christian

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2018

Y1 - 2018

N2 - Cavitation is a complex multiphase phenomenon, where the production of vapor bubbles leads to opaqueness of the flow. While it is nearly impossible to visualize the interior of the cavitation region with visible light, we show that with X-ray computed tomography it is possible to obtain the time-averaged void fraction distribution in an axisymmetric converging-diverging nozzle (venturi). This technique is based on the amount of energy absorbed by the material, based on its density and thickness. Time-averaged 3D reconstruction of the X-ray images is used (i) to distinguish between vapor and liquid phase, (ii) to get radial geometric features of the flow, and (iii) to quantify the local void fraction. The results show the presence of intense cavitation at the walls of the venturi, and the vapor fraction decreases downstream of the venturi with the vapor cloud.

AB - Cavitation is a complex multiphase phenomenon, where the production of vapor bubbles leads to opaqueness of the flow. While it is nearly impossible to visualize the interior of the cavitation region with visible light, we show that with X-ray computed tomography it is possible to obtain the time-averaged void fraction distribution in an axisymmetric converging-diverging nozzle (venturi). This technique is based on the amount of energy absorbed by the material, based on its density and thickness. Time-averaged 3D reconstruction of the X-ray images is used (i) to distinguish between vapor and liquid phase, (ii) to get radial geometric features of the flow, and (iii) to quantify the local void fraction. The results show the presence of intense cavitation at the walls of the venturi, and the vapor fraction decreases downstream of the venturi with the vapor cloud.

KW - venturi

KW - X-ray computed tomography

KW - cloud cavitation

U2 - 10.1115/1.861851_ch209

DO - 10.1115/1.861851_ch209

M3 - Conference contribution

SP - 1104

EP - 1108

BT - Proceedings of the 10th International Symposium on Cavitation (CAV2018)

A2 - Katz, Joseph

PB - ASME

CY - New York, NY, USA

T2 - CAV2018: 10th International Symposium on Cavitation

Y2 - 14 May 2018 through 16 May 2018

ER -

X-ray computed tomography of cavitating flow in a converging-diverging nozzle

Abstract

Conference

Bibliographical note

Keywords

Access to Document

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Datasets

Complete dataset for Converging-Diverging Nozzle

X-ray dataset for cavitating Converging-Diverging Nozzle

Cite this