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University of Washington

1. Frydman, Jonathan. Transient Oxygen Droplet Combustion in a Hydrogen Atmosphere: A Numerical Approach.

Degree: 2018, University of Washington

In liquid rocket propulsion oxygen normally enters the combustion chamber as a dispersed phase, as the hydrogen fuel more rapidly evaporates into a continuous, vapor phase. The foundational configuration considered here is a single liquid oxygen droplet surrounded by gaseous hydrogen. This project employs computational techniques to model the coupled oxidizer/fuel mixing, ignition, and combustion behaviors of the liquid oxygen/gaseous hydrogen system. For simplicity the problem is modeled with spherical symmetry, consistent with microgravity conditions. Conservation equations are implemented within the OpenFOAM platform to calculate species concentrations, temperatures, and heat release rates as functions of time and space. The OpenFOAM software package allows for calculations to be run in a sophisticated run-time environment. Both single-step and six-step chemical reaction models are employed for simulating oxygen-hydrogen combustion. Numerical simulations of both chemical models show diffusion, ignition, and the subsequent formation of three distinct flame zones. These include premixed flames in both the fuel and oxidizer sides of the diffusion flame at the stoichiometric interface. The premixed flame zones weaken as a quasi-steady combustion state is achieved in both cases. The global-chemistry reaction simulation is run until near total consumption of the oxygen occurs. A number of suggestions are presented based off these results for improving future simulation accuracy and efficiency. Advisors/Committee Members: Hermanson, James (advisor).

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Frydman, J. (2018). Transient Oxygen Droplet Combustion in a Hydrogen Atmosphere: A Numerical Approach. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/42168

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Frydman, Jonathan. “Transient Oxygen Droplet Combustion in a Hydrogen Atmosphere: A Numerical Approach.” 2018. Thesis, University of Washington. Accessed December 10, 2018. http://hdl.handle.net/1773/42168.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Frydman, Jonathan. “Transient Oxygen Droplet Combustion in a Hydrogen Atmosphere: A Numerical Approach.” 2018. Web. 10 Dec 2018.

Vancouver:

Frydman J. Transient Oxygen Droplet Combustion in a Hydrogen Atmosphere: A Numerical Approach. [Internet] [Thesis]. University of Washington; 2018. [cited 2018 Dec 10]. Available from: http://hdl.handle.net/1773/42168.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Frydman J. Transient Oxygen Droplet Combustion in a Hydrogen Atmosphere: A Numerical Approach. [Thesis]. University of Washington; 2018. Available from: http://hdl.handle.net/1773/42168

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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