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Haake FINAL 12 7 2020 with cert.pdf (9.53 MB)

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Simulation and Analysis of Closed System Methane Combustion

Haake, Eric
http://rave.ohiolink.edu/etdc/view?acc_num=ysu1607530059350376

Abstract Details

2020, Master of Science in Engineering, Youngstown State University, Department of Mechanical, Industrial and Manufacturing Engineering.
This project was funded by a company where some work is proprietary and is not recorded in this paper. The purpose of this project was to simulate, analyze and improve an enclosed methane combustion. The final goal was to reduce the overall pressure in the system along with determining if the system could be analyzed without the need of simulations. Simulation and Analysis of the combustion model requires a fundamental understanding of all the basic processes used. An understanding of the simulation software fluent along with the ability to manipulate the settings to what is required for the specific simulation being performed. An understanding of the chemical kinetics is required for proper setup of the simulation model. Prior to simulating the full model, multiple small simulations were performed to determine the settings needed for Ansys Fluent. Once these settings were determined then full model simulations with varying properties were performed. Based on both the simulations and literature it was found that when the combustion is performed at the stoichiometric ratio, the combustion is at its hottest adiabatic flame temperature and results in the highest pressures in the chamber. With changes to both the initial pressure and concentration of nitrogen the resulting pressures were determined to be lower than the base line model as expected. While these lower values were expected, there is a large percent change in the pressure across the model. The major findings from this project have been the interactions of the shock waves in the chamber. Depending on what is in the chamber, these shock waves can cause irreversible damage to the part. With the introduction of complex geometry in the chamber the approximation of the shock waves become much more complex and analysis of the part though simulation would be the best course of action in the determination of these shock waves. An attempt to lower the shock waves pressure peaks were made with results in drastically lower pressures due to forcing the detonation combustion to turn turbulent. With the flame front no longer driving the pressure shock the maximum pressure observed in the chamber is lower.
Stefan Moldovan, PhD (Advisor)
Kyosung Choo, PhD (Committee Member)
Kevin Disotell, PhD (Committee Member)
145 p.
Mechanical Engineering
Methane Combustion; Ansys Fluent; Simulation

Recommended Citations

Citations

  • Haake, E. (2020). Simulation and Analysis of Closed System Methane Combustion [Master's thesis, Youngstown State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1607530059350376

    APA Style (7th edition)

  • Haake, Eric. Simulation and Analysis of Closed System Methane Combustion. 2020. Youngstown State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ysu1607530059350376.

    MLA Style (8th edition)

  • Haake, Eric. "Simulation and Analysis of Closed System Methane Combustion." Master's thesis, Youngstown State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1607530059350376

    Chicago Manual of Style (17th edition)

ysu1607530059350376
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This open access ETD is published by Youngstown State University and OhioLINK.