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Crowell_PhD_Dissertation.pdf (10.9 MB)

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Model Reduction of Computational Aerothermodynamics for Multi-Discipline Analysis in High Speed Flows

Crowell, Andrew R
http://rave.ohiolink.edu/etdc/view?acc_num=osu1366204830

Abstract Details

2013, Doctor of Philosophy, Ohio State University, Aero/Astro Engineering.
This dissertation describes model reduction techniques for the computation of aerodynamic heat flux and pressure loads for multi-disciplinary analysis of hypersonic vehicles. NASA and the Department of Defense have expressed renewed interest in the development of responsive, reusable hypersonic cruise vehicles capable of sustained high-speed flight and access to space. However, an extensive set of technical challenges have obstructed the development of such vehicles. These technical challenges are partially due to both the inability to accurately test scaled vehicles in wind tunnels and to the time intensive nature of high-fidelity computational modeling, particularly for the fluid using Computational Fluid Dynamics (CFD). The aim of this dissertation is to develop efficient and accurate models for the aerodynamic heat flux and pressure loads to replace the need for computationally expensive, high-fidelity CFD during coupled analysis. Furthermore, aerodynamic heating and pressure loads are systematically evaluated for a number of different operating conditions, including: simple two-dimensional flow over flat surfaces up to three-dimensional flows over deformed surfaces with shock-shock interaction and shock-boundary layer interaction. An additional focus of this dissertation is on the implementation and computation of results using the developed aerodynamic heating and pressure models in complex fluid-thermal-structural simulations. Model reduction is achieved using a two-pronged approach. One prong focuses on developing analytical corrections to isothermal, steady-state CFD flow solutions in order to capture flow effects associated with transient spatially-varying surface temperatures and surface pressures (e.g., surface deformation, surface vibration, shock impingements, etc.). The second prong is focused on minimizing the computational expense of computing the steady-state CFD solutions by developing an efficient surrogate CFD model. The developed two-pronged approach is found to exhibit balanced performance in terms of accuracy and computational expense, relative to several existing approaches. This approach enables CFD-based loads to be implemented into long duration fluid-thermal-structural simulations.
Jack McNamara (Advisor)
Thomas Eason, III (Committee Member)
Jeffrey Bons (Committee Member)
Mo-How Herman Shen (Committee Member)
Mei Zhuang (Committee Member)
349 p.
Aerospace Engineering
Aerodynamic Heating; Pressure; Fluid-Thermal-Structural Analysis; Reduced Order Modeling; Surrogate Modeling; Computational Fluid Dynamics; Hypersonic; Supersonic; High-Speed Flow

Recommended Citations

Citations

  • Crowell, A. R. (2013). Model Reduction of Computational Aerothermodynamics for Multi-Discipline Analysis in High Speed Flows [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366204830

    APA Style (7th edition)

  • Crowell, Andrew. Model Reduction of Computational Aerothermodynamics for Multi-Discipline Analysis in High Speed Flows. 2013. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1366204830.

    MLA Style (8th edition)

  • Crowell, Andrew. "Model Reduction of Computational Aerothermodynamics for Multi-Discipline Analysis in High Speed Flows." Doctoral dissertation, Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366204830

    Chicago Manual of Style (17th edition)

osu1366204830
1,131
© 2013, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.