Abstract
dc:description.abstract<p>Cryogenic sprays have many applications in modern engineering. Cooling of electronic equipment subject to high heat flows, surgical ablation of gastrointestinal mucosae or orbital maneuvering are a few examples of their versatility. However, the atomization of a cryogenic liquid is a complex process. During such an event, aerodynamic effects associated with secondary atomization are further affected by thermodynamic flashing. A better understanding of the characteristics of cryogenic sprays is then necessary to allow for improved design and optimization in applications. The overarching objective of this study is to document such characteristics. The numerical simulation was performed over cryogenic nitrogen spray using an Eulerian-Lagrangian approach. In other words, while the gas phase of the flow is treated as a continuum, the nitrogen droplets are tracked individually in a Lagrangian sense. Models for evaporation, atomization, and breakups capture the physical processes experienced by droplets along their pathways. In addition, turbulence in the flow is captured by the k-omega SST model. Simulations performed over a wide range of nozzle inlet pressure suggest that the spray cone angle tends to remain constant. In contrast, the diameter of droplets along the centerline of the spray reduces significantly. Finally, it was noticed that a higher concentration of liquid nitrogen is observed on a target plate as the nozzle inlet pressure increases.</p>
Degree
thesis:*- Name thesis:degree_name
- Master of Science in Aerospace Engineering
- Level thesis:degree_level
- Thesis - Open Access
- Discipline thesis:degree_discipline
- Aerospace Engineering
- Year
- 2021
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Shah, Neel Kishorkumar
Subjects
dc:subject × 9Identifiers
dc:identifier.*- Repository record dc:identifier
- https://commons.erau.edu/edt/637
- OAI identifier oai:identifier
- oai:commons.erau.edu:edt-1645