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Atomization and Sprays

Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

Institutional price:	$787.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2006, Volume16

130 pages

Issue price - $80.00

SINGLE-SHOT TWO-DIMENSIONAL BALLISTIC IMAGING OF THE LIQUID CORE IN AN ATOMIZING SPRAY

Megan Paciaroni
Department of Combustion Physics, Lund Institute of Technology, 221 00 Lund, Sweden

Mark Linne
Department of Combustion Physics, Lund Institute of Technology, 221 00 Lund, Sweden

Tyler Hall
Division of Engineering, Colorado School of Mines, Golden, Colorado, USA

Jean-Pierre Delplanque
Colorado School of Mines, Division of Engineering, Golden, Colorado 80401

Terry E. Parker
Division of Engineering, Colorado School of Mines, Golden, Colorado, USA

ABSTRACT

We have developed a technique to image the near-field liquid core within an atomizing spray. To obtain high-fidelity images of the liquid core in such a spray has been very challenging up to this point. In this article, however, we describe the successful use of a time-gated ballistic imaging instrument to obtain high spatial resolution, single-shot images of the liquid core in an atomizing water spray. Time series of these images reveal a flow field undergoing turbulent primary breakup. One can also detect potential signatures of spatially periodic behavior, shedding of droplets from an intact core, and small voids that seem to appear and then coalesce with distance. We present images at six positions downstream of the jet exit and discuss our findings.