Organizational Unit:
Daniel Guggenheim School of Aerospace Engineering
Daniel Guggenheim School of Aerospace Engineering
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ItemState-of-the-art rotor aerodynamics and shipboard rotorcraft flight simulation(Georgia Institute of Technology, 2012-09) Prasad, Jonnalagadda V. R. ; Sankar, Lakshmi N.
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ItemA novel augmentor that does not use flame holders to stabilize the combustion process(Georgia Institute of Technology, 2012-06) Zinn, Ben T. ; Lubarsky, Eugene ; Neumeier, Yedidia ; Williams, AimeeThis report describes the process of determining auto-ignition delay of the liquid Jet-A aviation fuel injected in a cross flow of vitiated air. Auto-ignition delays were measured by processing of the time-averaged chemiluminescence images for a range of temperatures from 898-1028K, vitiated oxygen percentages from 9.3% to 12.2%, velocities from 80 – 140 m/s and global Jet-A to, vitiated-air mixture equivalence ratios from φ=0.3 to φ=1.5. It was found that ignition delay increases exponentially from one to ten milliseconds with inverse temperature variation and are more scattered at lower temperatures. The data obtained in this study reveals delay times much shorter than those measured in most of other studies, but with same character of dependence upon the temperature of the flow.
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ItemHybrid solution-adaptive unstructured Cartesian method for large-eddy simulation of detonation in multi-phase turbulent reactive mixtures(Georgia Institute of Technology, 2012-03) Menon, Suresh ; Gallagher, Timothy ; Muralidharan, BalajiA class of problems of both great fundamental interest and practical relevance is in the field of highly compressible turbulent flows of multi-fluids. Shock interaction with turbulence and/or flames have many practical applications and require advanced computational techniques. This report summarizes the work done to date to develop methods and algorithms for hybrid structured-unstructured methods in large-eddy simulations (LES). Particular emphasis is given to efficiency and accuracy while using techniques applicable to solution-adaptive approaches. The formulation and algorithm for statically refined grids for DNS and LES is shown to be robust and allows rapid inclusion in existing solvers with a minimal change in code base while also ensuring compatibility with existing features. Extensions to solution-adaptive techniques from the static approach are discussed. The application of the method to numerous flow examples demonstrates the capability and robustness of the method. Finally, an adaptive Cartesian method using level-sets and cut-cells to solve the interactions of complex, deforming and reacting bodies in a compressible flow field is developed and validated.
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ItemAdvanced methods for intelligent flight guidance and planning in support of pilot decision making(Georgia Institute of Technology, 2012-03-01) Tsiotras, Panagiotis ; Johnson, Eric N.
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ItemEnhanced modeling and analysis for technology cost-benefit estimation(Georgia Institute of Technology, 2011-12-31) Mavris, Dimitri N.
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ItemSystem-wide reliability and life cycle cost model for turbomachinery ...(Georgia Institute of Technology, 2011-12-06) Volovoi, Vitali V.
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ItemCollaborative Research: Large numerical simulations of turbulence and Reynolds, Schmidt and Rossby number scalings(Georgia Institute of Technology, 2011-10-20) Yeung, Pui-kuen ; Sreenivasan, Katepalli ; Sawford, Brian
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ItemA conceptual and computational framework for identifying and predicting the performance of novel airspace concept of operations(Georgia Institute of Technology, 2011-09) Volovoi, Vitali ; Lee, Seung Man
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ItemReconciling differences in post-flight trajectory reconstruction for EDL applications(Georgia Institute of Technology, 2011-07-31) Corman, Jason Andrew ; German, Brian J.
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ItemGoali: next generation active safety control systems for crash-avoidance of passenger vehicles using expert driver knowledge(Georgia Institute of Technology, 2011-07-01) Tsiotras, Panagiotis ; Lu, Jianbo
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