Campus Units
Mechanical Engineering, Chemical and Biological Engineering
Document Type
Conference Proceeding
Conference
50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Publication Version
Published Version
Publication Date
2014
Journal or Book Title
50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
First Page
3787
DOI
10.2514/6.2014-3787
Conference Title
AIAA Propulsion and Energy Forum
Conference Date
July 28-30, 2014
City
Cleveland, OH
Abstract
The spray characteristics of a liquid-liquid double swirl coaxial injector were studied using non-invasive optical, laser, and X-ray diagnostics. Phase Doppler interferometry was used to characterize droplet statistics and non-dimensional droplet parameters over a range of inlet conditions and for various fluids allowing for a study on the role of fluid properties on atomization. Based on the atomization statistics and observed trends from high-speed images, a description of breakup regimes over a range of Reynolds and Weber numbers was created. Next, X-ray computed tomography scans revealed that the spray cone was distinctively non-uniform and comprised of several pockets of increased mass concentration which varied with injection pressure. Finally, a parametric study of injector exit geometry demonstrated that spray breakup time, breakup type, and sheet stability could be controlled with exit geometry. Implications for these data on injector stability and atomization efficiency are discussed considering the desired performance characteristics of liquid-liquid rocket injectors.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Radke, Christopher D.; Heindel, Theodore J.; and Meyer, Terrence R., "Effect of Injector Exit Geometry on Atomization of a Liquid-Liquid Double Swirl Coaxial Injector using Non-Invasive Laser, Optical, and X-ray Techniques" (2014). Mechanical Engineering Conference Presentations, Papers, and Proceedings. 181.
https://lib.dr.iastate.edu/me_conf/181
Comments
This proceeding is published as Radke, Christopher D., Theodore J. Heindel, and Terrence R. Meyer. "Effect of Injector Exit Geometry on Atomization of a Liquid-Liquid Double Swirl Coaxial Injector using Non-Invasive Laser, Optical, and X-ray Techniques." In 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, p. 3787. 2014. DOI: 10.2514/6.2014-3787. Posted with permission.