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Technical Briefs

Experimental Test Rig With Results on Liquid Atomization by Slinger Injectors

[+] Author and Article Information
Carmen Sescu

Department of Mechanical, Industrial and Manufacturing Engineering, The University of Toledo, Toledo, OH 43606csescu@utoledo.edu

Bogdan R. Kucinschi

Department of Mechanical, Industrial and Manufacturing Engineering, The University of Toledo, Toledo, OH 43606bkucinschi@gmail.com

Abdollah A. Afjeh

Department of Mechanical, Industrial and Manufacturing Engineering, The University of Toledo, Toledo, OH 43606abdollah.afjeh@utoledo.edu

K. Cyril Masiulaniec

Department of Mechanical, Industrial and Manufacturing Engineering, The University of Toledo, Toledo, OH 43606

J. Eng. Gas Turbines Power 133(11), 114505 (May 18, 2011) (4 pages) doi:10.1115/1.4003790 History: Received January 21, 2011; Revised March 02, 2011; Published May 18, 2011; Online May 18, 2011

In this work, a rotary atomizer, referred to as a slinger injector, is investigated. An experimental setup has been designed to model the environment of the combustion chamber, and an optical measurement system has been implemented to analyze the liquid atomization provided by the slinger injector. In actual small gas turbines, a critical aspect is related to the start-up phase, which typically takes place at speeds around 10,000 rpm. The main scope of this research was to study the liquid spray at relatively low velocities. The primary breakup visualization, breakup length measurement, and droplet size measurement were performed for different rotational speeds. Several pictures of liquid breakup are included, and various mean and representative diameters are presented. In addition, drop size histograms and cumulative volume distribution curves are also included. The results show a decrease in both the breakup length and the mean droplet sizes with increasing rotational speed.

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Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

Grahic Jump Location
Figure 1

Slinger assembly: 1-cup, 2-ring, 3-nut, and 4-O-ring

Grahic Jump Location
Figure 2

Visualization of the liquid breakup patterns at (a) 5100 rpm and (b) 9000 rpm

Grahic Jump Location
Figure 3

Droplet size distributions at 5100 rpm and 9000 rpm

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