Full metadata
Title
Detailed numerical simulation of liquid jet in crossflow atomization with high density ratios
Description
The atomization of a liquid jet by a high speed cross-flowing gas has many applications such as gas turbines and augmentors. The mechanisms by which the liquid jet initially breaks up, however, are not well understood. Experimental studies suggest the dependence of spray properties on operating conditions and nozzle geom- etry. Detailed numerical simulations can offer better understanding of the underlying physical mechanisms that lead to the breakup of the injected liquid jet. In this work, detailed numerical simulation results of turbulent liquid jets injected into turbulent gaseous cross flows for different density ratios is presented. A finite volume, balanced force fractional step flow solver to solve the Navier-Stokes equations is employed and coupled to a Refined Level Set Grid method to follow the phase interface. To enable the simulation of atomization of high density ratio fluids, we ensure discrete consistency between the solution of the conservative momentum equation and the level set based continuity equation by employing the Consistent Rescaled Momentum Transport (CRMT) method. The impact of different inflow jet boundary conditions on different jet properties including jet penetration is analyzed and results are compared to those obtained experimentally by Brown & McDonell(2006). In addition, instability analysis is performed to find the most dominant insta- bility mechanism that causes the liquid jet to breakup. Linear instability analysis is achieved using linear theories for Rayleigh-Taylor and Kelvin- Helmholtz instabilities and non-linear analysis is performed using our flow solver with different inflow jet boundary conditions.
Date Created
2013
Contributors
- Ghods, Sina (Author)
- Herrmann, Marcus (Thesis advisor)
- Squires, Kyle (Committee member)
- Chen, Kangping (Committee member)
- Huang, Huei-Ping (Committee member)
- Tang, Wenbo (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
xi, 86 p. : ill. (some col.)
Language
eng
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.18119
Statement of Responsibility
by Sina Ghods
Description Source
Viewed on Jan. 6, 2014
Level of coding
full
Note
thesis
Partial requirement for: Ph.D., Arizona State University, 2013
bibliography
Includes bibliographical references (p. 83-86)
Field of study: Mechanical engineering
System Created
- 2013-07-12 06:29:45
System Modified
- 2021-08-30 01:39:12
- 3 years 2 months ago
Additional Formats