Soap bubbles for large-scale PIV in industrial wind tunnels

David Engler Faleiros; Marthijn Tuinstra; Bart D. van Rooijen; Fulvio Scarano; Andrea Sciacchitano

doi:10.18726/2019_3

Soap bubbles for large-scale PIV in industrial wind tunnels

David Engler Faleiros, Marthijn Tuinstra, Bart D. van Rooijen, Fulvio Scarano, Andrea Sciacchitano

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

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Abstract

This work evaluates the use of helium-filled soap bubbles (HFSB) for Particle Image Velocimetry (PIV) measurements at high Reynolds numbers (up to 3.2 million) in aeronautics. The measurements are performed in the Low Speed Tunnel (LST) of the German-Dutch Wind Tunnels (DNW) using a high-lift airfoil in close-to-stall conditions up to 70 m/s. Experiments using Di-ethylhexyl- sebacat (DEHS) particles are performed for a comparison of the two seeding techniques. The signal to noise ratio of HFSB images was two orders of magnitude larger than that of DEHS, which strongly reduced the unwanted effects of background reflections and light intensity spatial variations, compared to DEHS particle images. The mean velocity field obtained with HFSB exhibits differences typically within 1% of the free stream velocity, when compared to DEHS measurements.

Original language	English
Title of host publication	Proceedings of the 13th International Symposium on Particle Image Velocimetry
Subtitle of host publication	22-27 July, Munich, Germany
Editors	Christian J. Kähler, Rainer Hain, Sven Scharnowski, Thomas Fuchs
Publisher	Universitat der Bundeswehr Munchen
Pages	862-872
Number of pages	11
ISBN (Electronic)	978-3-943207-39-2
DOIs	https://doi.org/10.18726/2019_3
Publication status	Published - 2019
Event	13th International Symposium on Particle Image Velocimetry - Munchen, Germany Duration: 22 Jul 2019 → 24 Jul 2019 Conference number: 13

Conference

Conference	13th International Symposium on Particle Image Velocimetry
Abbreviated title	ISPIV 2019
Country/Territory	Germany
City	Munchen
Period	22/07/19 → 24/07/19

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Engler Faleiros, D., Tuinstra, M., van Rooijen, B. D., Scarano, F., & Sciacchitano, A. (2019). Soap bubbles for large-scale PIV in industrial wind tunnels. In C. J. Kähler, R. Hain, S. Scharnowski, & T. Fuchs (Eds.), Proceedings of the 13th International Symposium on Particle Image Velocimetry: 22-27 July, Munich, Germany (pp. 862-872). Universitat der Bundeswehr Munchen. https://doi.org/10.18726/2019_3

Engler Faleiros, David ; Tuinstra, Marthijn ; van Rooijen, Bart D. et al. / Soap bubbles for large-scale PIV in industrial wind tunnels. Proceedings of the 13th International Symposium on Particle Image Velocimetry: 22-27 July, Munich, Germany. editor / Christian J. Kähler ; Rainer Hain ; Sven Scharnowski ; Thomas Fuchs. Universitat der Bundeswehr Munchen, 2019. pp. 862-872

@inproceedings{14bb2c008d9943a7bfe171dc98d71867,

title = "Soap bubbles for large-scale PIV in industrial wind tunnels",

abstract = "This work evaluates the use of helium-filled soap bubbles (HFSB) for Particle Image Velocimetry (PIV) measurements at high Reynolds numbers (up to 3.2 million) in aeronautics. The measurements are performed in the Low Speed Tunnel (LST) of the German-Dutch Wind Tunnels (DNW) using a high-lift airfoil in close-to-stall conditions up to 70 m/s. Experiments using Di-ethylhexyl- sebacat (DEHS) particles are performed for a comparison of the two seeding techniques. The signal to noise ratio of HFSB images was two orders of magnitude larger than that of DEHS, which strongly reduced the unwanted effects of background reflections and light intensity spatial variations, compared to DEHS particle images. The mean velocity field obtained with HFSB exhibits differences typically within 1% of the free stream velocity, when compared to DEHS measurements. ",

author = "{Engler Faleiros}, David and Marthijn Tuinstra and {van Rooijen}, {Bart D.} and Fulvio Scarano and Andrea Sciacchitano",

year = "2019",

doi = "10.18726/2019_3",

language = "English",

pages = "862--872",

editor = "K{\"a}hler, {Christian J.} and Rainer Hain and Sven Scharnowski and { Fuchs}, {Thomas }",

booktitle = "Proceedings of the 13th International Symposium on Particle Image Velocimetry",

publisher = "Universitat der Bundeswehr Munchen",

note = "13th International Symposium on Particle Image Velocimetry , ISPIV 2019 ; Conference date: 22-07-2019 Through 24-07-2019",

}

Engler Faleiros, D, Tuinstra, M, van Rooijen, BD, Scarano, F & Sciacchitano, A 2019, Soap bubbles for large-scale PIV in industrial wind tunnels. in CJ Kähler, R Hain, S Scharnowski & T Fuchs (eds), Proceedings of the 13th International Symposium on Particle Image Velocimetry: 22-27 July, Munich, Germany. Universitat der Bundeswehr Munchen, pp. 862-872, 13th International Symposium on Particle Image Velocimetry , Munchen, Germany, 22/07/19. https://doi.org/10.18726/2019_3

Soap bubbles for large-scale PIV in industrial wind tunnels. / Engler Faleiros, David; Tuinstra, Marthijn; van Rooijen, Bart D. et al.
Proceedings of the 13th International Symposium on Particle Image Velocimetry: 22-27 July, Munich, Germany. ed. / Christian J. Kähler; Rainer Hain; Sven Scharnowski; Thomas Fuchs. Universitat der Bundeswehr Munchen, 2019. p. 862-872.

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

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T1 - Soap bubbles for large-scale PIV in industrial wind tunnels

AU - Engler Faleiros, David

AU - Tuinstra, Marthijn

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AU - Sciacchitano, Andrea

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N2 - This work evaluates the use of helium-filled soap bubbles (HFSB) for Particle Image Velocimetry (PIV) measurements at high Reynolds numbers (up to 3.2 million) in aeronautics. The measurements are performed in the Low Speed Tunnel (LST) of the German-Dutch Wind Tunnels (DNW) using a high-lift airfoil in close-to-stall conditions up to 70 m/s. Experiments using Di-ethylhexyl- sebacat (DEHS) particles are performed for a comparison of the two seeding techniques. The signal to noise ratio of HFSB images was two orders of magnitude larger than that of DEHS, which strongly reduced the unwanted effects of background reflections and light intensity spatial variations, compared to DEHS particle images. The mean velocity field obtained with HFSB exhibits differences typically within 1% of the free stream velocity, when compared to DEHS measurements.

AB - This work evaluates the use of helium-filled soap bubbles (HFSB) for Particle Image Velocimetry (PIV) measurements at high Reynolds numbers (up to 3.2 million) in aeronautics. The measurements are performed in the Low Speed Tunnel (LST) of the German-Dutch Wind Tunnels (DNW) using a high-lift airfoil in close-to-stall conditions up to 70 m/s. Experiments using Di-ethylhexyl- sebacat (DEHS) particles are performed for a comparison of the two seeding techniques. The signal to noise ratio of HFSB images was two orders of magnitude larger than that of DEHS, which strongly reduced the unwanted effects of background reflections and light intensity spatial variations, compared to DEHS particle images. The mean velocity field obtained with HFSB exhibits differences typically within 1% of the free stream velocity, when compared to DEHS measurements.

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DO - 10.18726/2019_3

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BT - Proceedings of the 13th International Symposium on Particle Image Velocimetry

A2 - Kähler, Christian J.

A2 - Hain, Rainer

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PB - Universitat der Bundeswehr Munchen

T2 - 13th International Symposium on Particle Image Velocimetry

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Engler Faleiros D, Tuinstra M, van Rooijen BD, Scarano F , Sciacchitano A. Soap bubbles for large-scale PIV in industrial wind tunnels. In Kähler CJ, Hain R, Scharnowski S, Fuchs T, editors, Proceedings of the 13th International Symposium on Particle Image Velocimetry: 22-27 July, Munich, Germany. Universitat der Bundeswehr Munchen. 2019. p. 862-872 doi: 10.18726/2019_3

Soap bubbles for large-scale PIV in industrial wind tunnels

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