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Interactions Between Shock Waves and Liquid Droplet Clusters: Interfacial Physics

Tripathi, Mitansh
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649769873613978

Abstract Details

2022, MS, University of Cincinnati, Engineering and Applied Science: Aerospace Engineering.
This study quantitatively investigates the fundamental physics underlying deformation and fragmentation behavior of single and multiple liquid cylinders placed in the path of a traveling normal shock wave using high-fidelity numerical simulations. This research is motivated by next-generation liquid-fueled scramjet and rotating detonation engines (RDE) where the liquid fuel interacts with shock waves and undergoes deformation, fragmentation, atomization and vaporization before it mixes with the air and subsequently burns. The focus of the current study is on the deformation and fragmentation physics. The mathematical formulation to investigate this multiphase problem is based on a modified 5-equation Kapila model that incorporates pressure-relaxation, viscous, and surface tension effects. Three configurations were studied in this effort: (1) a single column of diameter 22 mm exposed to a shock wave traveling at Mach 2.4, (2) a single cylinder system with a diameter of 4.8 mm, exposed to a shock wave traveling at Mach 1.47 and (3) a two identical cylinder system with diameters of 4.8 mm and 30 mm apart, and exposed to a shock wave moving a Mach number of 1.47. The computational results show excellent agreement with high-speed images and droplet deformation measured in the experiment. The deformation and events leading to fragmentation are identified for both cases. The production of baroclinic torque on the cylinder surface is identified as the cause for instabilities which grow over time leading to ligamentation, tearing and breakup.
Prashant Khare, Ph.D. (Committee Member)
Luis Bravo, Ph.D. (Committee Member)
Shaaban Abdallah, Ph.D. (Committee Member)
58 p.
Aerospace Materials
shock waves; droplet breakup

Recommended Citations

Citations

  • Tripathi, M. (2022). Interactions Between Shock Waves and Liquid Droplet Clusters: Interfacial Physics [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649769873613978

    APA Style (7th edition)

  • Tripathi, Mitansh. Interactions Between Shock Waves and Liquid Droplet Clusters: Interfacial Physics. 2022. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649769873613978.

    MLA Style (8th edition)

  • Tripathi, Mitansh. "Interactions Between Shock Waves and Liquid Droplet Clusters: Interfacial Physics." Master's thesis, University of Cincinnati, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649769873613978

    Chicago Manual of Style (17th edition)

ucin1649769873613978
171
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This open access ETD is published by University of Cincinnati and OhioLINK.