Development of a 2-phase flow nozzle for fine droplet generation

Van Puyenbroeck, T., Brieschenk, S. and Jahn, I. H. (2014). Development of a 2-phase flow nozzle for fine droplet generation. In: Harun Chowdhury and Firoz Alam, Proceedings of the 19th Australasian Fluid Mechanics Conference. 19th Australasian Fluid Mechanics Conference, Melbourne, VIC, Australia, (422.1-422.4). 8-11 December 2014.

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Name Description MIMEType Size Downloads
Author Van Puyenbroeck, T.
Brieschenk, S.
Jahn, I. H.
Title of paper Development of a 2-phase flow nozzle for fine droplet generation
Conference name 19th Australasian Fluid Mechanics Conference
Conference location Melbourne, VIC, Australia
Conference dates 8-11 December 2014
Proceedings title Proceedings of the 19th Australasian Fluid Mechanics Conference
Place of Publication Melbourne, VIC, Australia
Publisher RMIT University
Publication Year 2014
Sub-type Fully published paper
Open Access Status
ISBN 9780646596952
Editor Harun Chowdhury
Firoz Alam
Start page 422.1
End page 422.4
Total pages 4
Collection year 2015
Language eng
Formatted Abstract/Summary
Fine sprays with droplet diameters (< 50mm), are widely used in engineering applications, ranging from liquid pre-cooling in natural draft cooling towers to fuel injection for scramjet en- gines. Traditionally fine droplets are generated by passing high pressure liquid through small diameter nozzles. The downsides of this method are high energy consumption arising from pumping work and limited flow rates arising from the small nozzle exit areas.

A way to overcome these limitations is to use a 2-phase Flow Nozzle. Here, liquid is injected together with a small quantity of gas through the same nozzle. The interaction of the two fluid streams significantly enhances liquid jet break-up. This paper presents the design and commissioning of an experimental test set-up for 2-phase nozzle development and the results obtained from testing a prototype nozzle injecting hydrocarbon fuel and nitrogen. Results show that the nozzle can generate droplets be- low 100mm at moderate operating pressures (5–10 bar), while maintaining flow rates comparable to those of high pressure single phase nozzles. In addition to proving the feasibility of the 2-phase nozzle concept, the experimental campaign has generated an extensive set of high speed videos, providing an insight into the liquid jet break-up process. These will be used in future computational fluid dynamic investigations.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Paper 422

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Created: Mon, 02 Feb 2015, 09:59:42 EST by Katie Gollschewski on behalf of School of Mechanical and Mining Engineering