LAPSE:2019.0636
Published Article
LAPSE:2019.0636
Air-Core-Liquid-Ring (ACLR) Atomization: Influences of Gas Pressure and Atomizer Scale Up on Atomization Efficiency
Marc O. Wittner, Heike P. Karbstein, Volker Gaukel
July 17, 2019
Air-core-liquid-ring (ACLR) atomizers present a specific type of internal mixing pneumatic atomizers, which can be used for efficient atomization of high viscous liquids. Generally, atomization efficiency is considered as a correlation between energy input and resulting droplet size. In pneumatic atomization, air-to-liquid ratio by mass (ALR) is commonly used as reference parameter of energy input. However, the pressure energy of the atomization gas is not considered in the calculation of ALR. In internal mixing ACLR atomizers, it can be assumed that this energy contributes to liquid disintegration by expansion of the gas core after exiting the atomizer. This leads to the hypothesis that droplet sizes decrease with increasing gas pressure at constant ALR. Therefore, the use of volumetric energy density (EV) as a reference parameter of energy input was investigated at different gas pressures between 0.4 and 0.8 MPa. Furthermore, scale up-related influences on the atomization efficiency of ACLR atomization were investigated by use of an atomizer with enlarged exit orifice diameter. We can conclude that EV can be applied as a reference parameter of ACLR atomization processes with different gas pressures. However, within the range investigated no clear influence of gas pressure on atomization efficiency was found. Up-scaling of ACLR atomizers allows production of similar droplet sizes, but atomization efficiency decreases with increasing exit orifice diameter.
Keywords
ACLR, efficiency, high viscous feeds, pneumatic atomization, scale up
Subject
Suggested Citation
Wittner MO, Karbstein HP, Gaukel V. Air-Core-Liquid-Ring (ACLR) Atomization: Influences of Gas Pressure and Atomizer Scale Up on Atomization Efficiency. (2019). LAPSE:2019.0636
Author Affiliations
Wittner MO: Institute of Process Engineering in Life Sciences: Food Process Engineering, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
Karbstein HP: Institute of Process Engineering in Life Sciences: Food Process Engineering, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
Gaukel V: Institute of Process Engineering in Life Sciences: Food Process Engineering, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
[Login] to see author email addresses.
Journal Name
Processes
Volume
7
Issue
3
Article Number
E139
Year
2019
Publication Date
2019-03-06
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr7030139, Publication Type: Journal Article
Record Map
Published Article

LAPSE:2019.0636
This Record
External Link

doi:10.3390/pr7030139
Publisher Version
Download
Files
[Download 1v1.pdf] (1.4 MB)
Jul 17, 2019
Main Article
License
CC BY 4.0
Meta
Record Statistics
Record Views
428
Version History
[v1] (Original Submission)
Jul 17, 2019
 
Verified by curator on
Jul 17, 2019
This Version Number
v1
Citations
Most Recent
This Version
URL Here
https://psecommunity.org/LAPSE:2019.0636
 
Original Submitter
Calvin Tsay
Links to Related Works
Directly Related to This Work
Publisher Version