Presented By: Aerospace Engineering
Chairs Distinguished Seminar: Towards Predictive Modeling for Computational Hypersonics
Ragini Acharya
Associate Professor
University of Tennessee Space Institute
About the seminar:
At present, computational fluid dynamics (CFD) is utilized as a significant tool for the design, evaluation, planning, and assessment for most hypersonic fight applications as well as wind tunnel tests. Among CFD techniques, Reynolds Averaged Navier Stokes (RANS) has been utilized as a practical method for this purpose while scale resolving methods are utilized for understanding/evaluation of specific phenomena not captured by RANS. There are several sources of uncertainty and errors in this CFD-based work-flow process including model-form uncertainties (grid, closure models for several terms in the governing equations), measurement uncertainties (boundary/input conditions that come from observations/measurements as well as their statistical approximation to input to the CFD), and interpretation of the calculated results. The seminar will highlight such issues and potential pathways for development of a common-vision methodology to develop truly predictive models for computational simulations of high-speed flows.
About the speaker:
Ragini Acharya joined the University of Tennessee Space Institute, (UTSI) as an Associate Professor in the Mechanical, Aerospace, and Biomedical Engineering, (MABE) Department.
Acharya received her PhD in Mechanical Engineering from The Pennsylvania State University in 2008.
Before coming to UTSI, Ragini Acharya spent over a decade in aerospace and defence industry with her last appointment as a Hypersonic Propulsion Lead at Raytheon Missile Systems. Acharya has been the principal investigator of multiple programs on Hypersonic and propulsion technologies, reacting flow modeling and computations, and uncertainty quantification method development. Her research has been funded by government agencies and industry including JHTO, ONR, UCAH, DARPA DSO, DARPA TTO, AFRL, NASA Langley, AMRDEC, MDA, and Raytheon Missile Systems. Acharya has co-authored two graduate-level textbooks on, “Turbulent and Multiphase Combustion” (John Wiley & Sons) in addition to over 50 technical articles in peer-reviewed publications and technical conferences. Acharya is an AIAA Associate Fellow, a Pre-college Outreach Director for AIAA Greater Huntsville Section, and a member of both the High-Speed Air Breathing Propulsion and Inlets, Nozzles, and Propulsion System Integration Technical Committees at AIAA.
Associate Professor
University of Tennessee Space Institute
About the seminar:
At present, computational fluid dynamics (CFD) is utilized as a significant tool for the design, evaluation, planning, and assessment for most hypersonic fight applications as well as wind tunnel tests. Among CFD techniques, Reynolds Averaged Navier Stokes (RANS) has been utilized as a practical method for this purpose while scale resolving methods are utilized for understanding/evaluation of specific phenomena not captured by RANS. There are several sources of uncertainty and errors in this CFD-based work-flow process including model-form uncertainties (grid, closure models for several terms in the governing equations), measurement uncertainties (boundary/input conditions that come from observations/measurements as well as their statistical approximation to input to the CFD), and interpretation of the calculated results. The seminar will highlight such issues and potential pathways for development of a common-vision methodology to develop truly predictive models for computational simulations of high-speed flows.
About the speaker:
Ragini Acharya joined the University of Tennessee Space Institute, (UTSI) as an Associate Professor in the Mechanical, Aerospace, and Biomedical Engineering, (MABE) Department.
Acharya received her PhD in Mechanical Engineering from The Pennsylvania State University in 2008.
Before coming to UTSI, Ragini Acharya spent over a decade in aerospace and defence industry with her last appointment as a Hypersonic Propulsion Lead at Raytheon Missile Systems. Acharya has been the principal investigator of multiple programs on Hypersonic and propulsion technologies, reacting flow modeling and computations, and uncertainty quantification method development. Her research has been funded by government agencies and industry including JHTO, ONR, UCAH, DARPA DSO, DARPA TTO, AFRL, NASA Langley, AMRDEC, MDA, and Raytheon Missile Systems. Acharya has co-authored two graduate-level textbooks on, “Turbulent and Multiphase Combustion” (John Wiley & Sons) in addition to over 50 technical articles in peer-reviewed publications and technical conferences. Acharya is an AIAA Associate Fellow, a Pre-college Outreach Director for AIAA Greater Huntsville Section, and a member of both the High-Speed Air Breathing Propulsion and Inlets, Nozzles, and Propulsion System Integration Technical Committees at AIAA.
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