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Modeling of turbulence effect on liquid jet atomization
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Trinh, H. P. |
| Copyright Year | 2007 |
| Description | Recent studies indicate that turbulence behaviors within a liquid jet have considerable effect on the atomization process. Such turbulent flow phenomena are encountered in most practical applications of common liquid spray devices. This research aims to model the effects of turbulence occurring inside a cylindrical liquid jet to its atomization process. The two widely used atomization models Kelvin-Helmholtz (KH) instability of Reitz and the Taylor analogy breakup (TAB) of O'Rourke and Amsden portraying primary liquid jet disintegration and secondary droplet breakup, respectively, are examined. Additional terms are formulated and appropriately implemented into these two models to account for the turbulence effect. Results for the flow conditions examined in this study indicate that the turbulence terms are significant in comparison with other terms in the models. In the primary breakup regime, the turbulent liquid jet tends to break up into large drops while its intact core is slightly shorter than those without turbulence. In contrast, the secondary droplet breakup with the inside liquid turbulence consideration produces smaller drops. Computational results indicate that the proposed models provide predictions that agree reasonably well with available measured data. |
| File Size | 6046653 |
| Page Count | 92 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080013165 |
| Archival Resource Key | ark:/13960/t0bw2fr0v |
| Language | English |
| Publisher Date | 2007-12-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Turbulent Flow Direct Numerical Simulation Jet Flow Computational Fluid Dynamics Disintegration Liquid Atomization Sprayers Kelvin-helmholtz Instability Drop Size Large Eddy Simulation Turbulence Effects Mathematical Models Turbulent Jets Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
