Planar imaging of scalar fields in a two phase turbulent jet

I. M. Kennedy; S. Starner; R. W. Bilger

Planar imaging of scalar fields in a two phase turbulent jet

I. M. Kennedy, S. Starner, R. W. Bilger

Mechanical and Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Laser imaging was applied to a turbulent two phase jet. A water spray was introduced into a flow of air from a round nozzle. The air was seeded with acetone vapor. A UV laser sheet illuminated the flow field of the spray and an unintensified CCD camera imaged the resultant fluorescence. A visible laser sheet, co-planar with the UV sheet, was pulsed to provide a light source for Planar Imaging Velocimetry (PIV). PIV was used to measure the velocities of the droplets and to estimate the relative velocity between the air and the spray droplets. The impact of the dispersed phase droplets on the structure of the scalar field in the jet was found to be slight for the conditions of the experiment. The water droplets of the spray absorbed acetone and gave rise to a strong fluorescence signal that prevented quantitative estimates of scalar dissipation rates from being obtained in the two phase flow. Triple images of droplets with PIV and UV beams suggested that it might be possible to measure particle accelerations in a spray.

Original language	English (US)
Title of host publication	Proceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference, Melbourne, Australia, 13-18 December 1998 (Volume 2)
Editors	MC Thompson, K Hourigan, MC Thompson, K Hourigan
Publisher	Monash University
Pages	639-641
Number of pages	3
ISBN (Print)	0732620449
State	Published - 1998
Event	Proceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference - Melbourne, Australia Duration: Dec 13 1998 → Dec 18 1998

Other

Other	Proceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference
Country	Australia
City	Melbourne
Period	12/13/98 → 12/18/98

ASJC Scopus subject areas

Engineering(all)

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Kennedy, I. M., Starner, S., & Bilger, R. W. (1998). Planar imaging of scalar fields in a two phase turbulent jet. In MC. Thompson, K. Hourigan, MC. Thompson, & K. Hourigan (Eds.), Proceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference, Melbourne, Australia, 13-18 December 1998 (Volume 2) (pp. 639-641). Monash University.

Planar imaging of scalar fields in a two phase turbulent jet. / Kennedy, I. M.; Starner, S.; Bilger, R. W.

Proceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference, Melbourne, Australia, 13-18 December 1998 (Volume 2). ed. / MC Thompson; K Hourigan; MC Thompson; K Hourigan. Monash University, 1998. p. 639-641.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kennedy, IM, Starner, S & Bilger, RW 1998, Planar imaging of scalar fields in a two phase turbulent jet. in MC Thompson, K Hourigan, MC Thompson & K Hourigan (eds), Proceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference, Melbourne, Australia, 13-18 December 1998 (Volume 2). Monash University, pp. 639-641, Proceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference, Melbourne, Australia, 12/13/98.

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abstract = "Laser imaging was applied to a turbulent two phase jet. A water spray was introduced into a flow of air from a round nozzle. The air was seeded with acetone vapor. A UV laser sheet illuminated the flow field of the spray and an unintensified CCD camera imaged the resultant fluorescence. A visible laser sheet, co-planar with the UV sheet, was pulsed to provide a light source for Planar Imaging Velocimetry (PIV). PIV was used to measure the velocities of the droplets and to estimate the relative velocity between the air and the spray droplets. The impact of the dispersed phase droplets on the structure of the scalar field in the jet was found to be slight for the conditions of the experiment. The water droplets of the spray absorbed acetone and gave rise to a strong fluorescence signal that prevented quantitative estimates of scalar dissipation rates from being obtained in the two phase flow. Triple images of droplets with PIV and UV beams suggested that it might be possible to measure particle accelerations in a spray.",

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