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A Computational Fluid Dynamics Simulation Of The Hypersonic Flights Of The Pegasus Vehicle Using An Artificial Viscosity Model And A Nonlinear Filtering Method
Download A Computational Fluid Dynamics Simulation Of The Hypersonic Flights Of The Pegasus Vehicle Using An Artificial Viscosity Model And A Nonlinear Filtering Method full books in PDF, epub, and Kindle. Read online A Computational Fluid Dynamics Simulation Of The Hypersonic Flights Of The Pegasus Vehicle Using An Artificial Viscosity Model And A Nonlinear Filtering Method ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis A Computational Fluid Dynamics Simulation of the Hypersonic Flights of the Pegasus Vehicle Using an Artificial Viscosity Model and a Nonlinear Filtering Method by : John Cadiz Mendoza
Download or read book A Computational Fluid Dynamics Simulation of the Hypersonic Flights of the Pegasus Vehicle Using an Artificial Viscosity Model and a Nonlinear Filtering Method written by John Cadiz Mendoza and published by . This book was released on 1995 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Computational Fluid Dynamics Simulation of the Hypersonic Flight of the Pegasus(TM) Vehicle Using an Artificial Viscosity Model and a Nonlinear Filtering Method by : John Cadiz Mendoza
Download or read book A Computational Fluid Dynamics Simulation of the Hypersonic Flight of the Pegasus(TM) Vehicle Using an Artificial Viscosity Model and a Nonlinear Filtering Method written by John Cadiz Mendoza and published by . This book was released on 1995 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Computational Fluid Dynamics Analysis of the Hypersonic Flights of Pegasus by : Darren Fricker
Download or read book A Computational Fluid Dynamics Analysis of the Hypersonic Flights of Pegasus written by Darren Fricker and published by . This book was released on 1992 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1996 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1996 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fifty Years of Flight Research by : David F. Fisher
Download or read book Fifty Years of Flight Research written by David F. Fisher and published by . This book was released on 1999 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: A bibliography of Technical Reports from Dryden Research Center, 1946-1996. Dryden was a National Advisory Committee for Aeronautics (NACA) facility from to 1946-1958, when NACA became NASA (National Aeronautics and Space Administration). This bibliography encompasses both NACA and NASA publications. Illustrated with diagrams and photos. Black and white version.
Book Synopsis A Summary of the Computational Fluid Dynamics Analysis of the Hypersonic Flights of Pegasus by : Darren Fricker
Download or read book A Summary of the Computational Fluid Dynamics Analysis of the Hypersonic Flights of Pegasus written by Darren Fricker and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Hypersonics written by Bertin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: These three volumes entitled Advances in Hypersonics contain the Proceedings of the Second and Third Joint US/Europe Short Course in Hypersonics which took place in Colorado Springs and Aachen. The Second Course was organized at the US Air Force Academy, USA in January 1989 and the Third Course at Aachen, Germany in October 1990. The main idea of these Courses was to present to chemists, com puter scientists, engineers, experimentalists, mathematicians, and physicists state of the art lectures in scientific and technical dis ciplines including mathematical modeling, computational methods, and experimental measurements necessary to define the aerothermo dynamic environments for space vehicles such as the US Orbiter or the European Hermes flying at hypersonic speeds. The subjects can be grouped into the following areas: Phys ical environments, configuration requirements, propulsion systems (including airbreathing systems), experimental methods for external and internal flow, theoretical and numerical methods. Since hyper sonic flight requires highly integrated systems, the Short Courses not only aimed to give in-depth analysis of hypersonic research and technology but also tried to broaden the view of attendees to give them the ability to understand the complex problem of hypersonic flight. Most of the participants in the Short Courses prepared a docu ment based on their presentation for reproduction in the three vol umes. Some authors spent considerable time and energy going well beyond their oral presentation to provide a quality assessment of the state of the art in their area of expertise as of 1989 and 1991.
Book Synopsis Hypersonic Maneuvering Vehicle Simulations Using Real-aas, Unstructured Navier-Stokes Software by : William D. McGrory
Download or read book Hypersonic Maneuvering Vehicle Simulations Using Real-aas, Unstructured Navier-Stokes Software written by William D. McGrory and published by . This book was released on 2001 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypersonic vehicles are becoming more of a reality with the current level of technology. Concept vehicles are now being made in order to test the most recent advances in hypersonic technology. Along with models for flight testing, CFD has become an important role in the development of modern hypersonic vehicles. The technology in CFD is making more complex configurations and flow-fields available for simulation. One of the advances in CFD that is making this possible is unstructured grid generation and flow solvers.
Book Synopsis Modeling, Analysis, and Control of a Hypersonic Vehicle with Significant Aero-thermo-elastic-propulsion Interactions, and Propulsive Uncertainty by : Akshay Shashikumar Korad
Download or read book Modeling, Analysis, and Control of a Hypersonic Vehicle with Significant Aero-thermo-elastic-propulsion Interactions, and Propulsive Uncertainty written by Akshay Shashikumar Korad and published by . This book was released on 2010 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines the modeling, analysis, and control system design issues for scramjet powered hypersonic vehicles. A nonlinear three degrees of freedom longitudinal model which includes aero-propulsion-elasticity effects was used for all analysis. This model is based upon classical compressible flow and Euler-Bernouli structural concepts. Higher fidelity computational fluid dynamics and finite elementmethods are needed formore precise intermediate and final evaluations. The methods presented within this thesis were shown to be useful for guiding initial control relevant design. The model was used to examine the vehicles static and dynamic characteristics over the vehicles trimmable region. The vehicle has significant longitudinal coupling between the fuel equivalency ratio (FER) and the flight path angle (FPA). For control system design, a two-input two-output plant (FER - elevator to speed-FPA) with 11 states (including 3 flexible modes) was used. Velocity, FPA, and pitch were assumed to be available for feedback.
Book Synopsis Development of a Non-Linear Simulation for Generic Hypersonic Vehicles - Asuhs1 by : National Aeronautics and Space Adm Nasa
Download or read book Development of a Non-Linear Simulation for Generic Hypersonic Vehicles - Asuhs1 written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-02 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A nonlinear simulation is developed to model the longitudinal motion of a vehicle in hypersonic flight. The equations of motion pertinent to this study are presented. Analytic expressions for the aerodynamic forces acting on a hypersonic vehicle which were obtained from Newtonian Impact Theory are further developed. The control surface forces are further examined to incorporate vehicle elastic motion. The purpose is to establish feasible equations of motion which combine rigid body, elastic, and aeropropulsive dynamics for use in nonlinear simulations. The software package SIMULINK is used to implement the simulation. Also discussed are issues needing additional attention and potential problems associated with the implementation (with proposed solutions). Salas, Juan and Lovell, T. Alan and Schmidt, David K. Unspecified Center...
Book Synopsis Steady Glide Dynamics and Guidance of Hypersonic Vehicle by : Wanchun Chen
Download or read book Steady Glide Dynamics and Guidance of Hypersonic Vehicle written by Wanchun Chen and published by Springer Nature. This book was released on 2020-11-07 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest researches on hypersonic steady glide dynamics and guidance, including the concept of steady glide reentry trajectory and the stability of its regular perturbation solutions, trajectory damping control technique for hypersonic glide reentry, singular perturbation guidance of hypersonic glide reentry, trajectory optimization based on steady glide, linear pseudospectral generalized nominal effort miss distance guidance, analytical entry guidance and trajectory-shaping guidance with final speed and load factor constraints. They can be used to solve many new difficult problems in entry guidance. And many practical engineering cases are provided for the readers for better understanding. Researchers and students in the fields of flight vehicle design or flight dynamics, guidance and control could use the book as valuable reference.
Author :Ernst Heinrich Hirschel Publisher :Springer Science & Business Media ISBN 13 :354089974X Total Pages :512 pages Book Rating :4.5/5 (48 download)
Book Synopsis Selected Aerothermodynamic Design Problems of Hypersonic Flight Vehicles by : Ernst Heinrich Hirschel
Download or read book Selected Aerothermodynamic Design Problems of Hypersonic Flight Vehicles written by Ernst Heinrich Hirschel and published by Springer Science & Business Media. This book was released on 2009-11-26 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book selected aerothermodynamic design problems in hypersonic vehicles are treated. Where applicable, it emphasizes the fact that outer surfaces of hypersonic vehicles primarily are radiation-cooled, an interdisciplinary topic with many implications.
Book Synopsis Modeling, Analysis, and Control of a Hypersonic Vehicle with Significant Aero-thermo-elastic-propulsion Interactions by : Jaidev Khatri
Download or read book Modeling, Analysis, and Control of a Hypersonic Vehicle with Significant Aero-thermo-elastic-propulsion Interactions written by Jaidev Khatri and published by . This book was released on 2011 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines themodeling, analysis, and control system design issues for scramjet powered hypersonic vehicles. A nonlinear three degrees of freedom longitudinal model which includes aero-propulsion-elasticity effects was used for all analyses. This model is based upon classical compressible flow and Euler-Bernouli structural concepts. Higher fidelity computational fluid dynamics and finite element methods are needed for more precise intermediate and final evaluations. The methods presented within this thesis were shown to be useful for guiding initial control relevant design. The model was used to examine the vehicle's static and dynamic characteristics over the vehicle's trimmable region. The vehicle has significant longitudinal coupling between the fuel equivalency ratio (FER) and the flight path angle (FPA). For control system design, a two-input two-output plant (FER - elevator to speed-FPA) with 11 states (including 3 flexible modes) was used. Velocity, FPA, and pitch were assumed to be available for feedback. Aerodynamic heat modeling and design for the assumed TPS was incorporated to original Bolender's model to study the change in static and dynamic properties. De-centralized control stability, feasibility and limitations issues were dealt with the change in TPS elasticity, mass and physical dimension. The impact of elasticity due to TPS mass, TPS physical dimension as well as prolonged heating was also analyzed to understand performance limitations of de-centralized control designed for nominal model.
Book Synopsis Numerical Simulation of the Hypersonic Flow Around Lifting Vehicles by :
Download or read book Numerical Simulation of the Hypersonic Flow Around Lifting Vehicles written by and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for solving the viscous hypersonic flow field around realistic configurations is presented. The numerical procedure for generating the required finite difference grid and the two-factored implicit flow solver are described. Results are presented for the shuttle orbiter and a generic wing-body configuration at hypersonic Mach numbers.
Book Synopsis Aero-propulso-elastic Analysis of a Supersonic Transport by : Joseph W. Connolly
Download or read book Aero-propulso-elastic Analysis of a Supersonic Transport written by Joseph W. Connolly and published by . This book was released on 2018 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this dissertation is to develop a modeling methodology of a nonlinear dynamic propulsion system and its integration with a computational fluid dynamics tool suitable for aeroelastic studies. A sensitivity study is conducted to investigate the vehicle structural response and propulsion system performance. The new modeling capability expands typical computational fluid dynamics based aeroelastic analysis by adding a nonlinear dynamic model of the turbomachinery that is capable of capturing relevant gas dynamics. An example case of the aero-propulso-elastic (APE) modeling capability is explored for a supersonic transport with turbofan engines. The propulsion system is composed of an external compression inlet, variable cycle turbofan engine, and convergent-divergent nozzle, where each component model uses a computational fluid dynamics approach to capture the dominant dynamics. The turbomachinery is modeled using a volume dynamics approach, where the focus is on one-dimensional computational analysis. The internal ducts of the inlet and nozzle are modeled with a quasi-one-dimensional MacCormack method. Each individual propulsion component model is compared against independently developed higher fidelity modeling methods and experimental test data, where available. The individual component models are then integrated into an overall simple propulsion system model. This allows for dynamic analysis, control design studies, and for a comparative verification of the turbomachinery model integrated with the higher fidelity three-dimensional computational model required for APE analysis. An overview of the methodology for integrating the propulsion system and elastic vehicle is provided. This is followed by a sensitivity study to explore coupling sensitivities compared against typical aeroelastic analysis. Dynamic and static vehicle responses are considered across key flight conditions and vehicle-level angles of attack, where the inclusion of the propulsion system has a 10% increase in vehicle wing tip deformations. It is found that the propulsion system is stable at various operating conditions, with structural oscillations having little impact on propulsion system performance. Perceived loudness, a key performance metric for a supersonic transport, is investigated using the APE model. APE results lead to an approximately 4 dB increase in noise over a rigid body analysis that neglects the propulsion system. By including the propulsion system in the analysis, the greatest impacts are shown during off nominal conditions, indicating that this modeling capability provides a powerful tool for detailed analysis during maneuvers and off design conditions.
Book Synopsis Assessment of Reduced Fidelity Modeling of a Maneuvering Hypersonic Vehicle by : Emily Rose Dreyer
Download or read book Assessment of Reduced Fidelity Modeling of a Maneuvering Hypersonic Vehicle written by Emily Rose Dreyer and published by . This book was released on 2021 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Balancing accurate and efficient estimation of aerothermodynamic loads is a significant challenge for multi-disciplinary modeling and analysis of high speed vehicles. High fidelity methods are desired in order to minimize modeling uncertainty. However, the need for either online aerothermodynamic modeling or many model iterations often introduces a hard constraint on model run-time that favors the use of classical engineering methods. Thus, systematic characterization of trade-offs in accuracy and run-time costs for different levels of modeling fidelity is a critical need. Technical challenges toward this need include the wide range of operating conditions and parameters associated with a complete vehicle, as well as the inability to comprehensively assess hypersonic configurations in ground-based facilities. The goal of this dissertation is to systematically study a range of reduced fidelity aerothermodynamics models in order to determine relevant fidelity. This is carried out by first examining the impact of analytical and data-driven model reductions over a broad parameter space in the context of steady-state aerothermodynamic loads. This work builds on previous by extending existing approaches to accommodate a complete three-dimensional hypersonic geometry. Three models for pressure are investigated: two of the models are kriging interpolants of either Reynolds-averaged Navier-Stokes (RANS) or Euler computational fluid dynamics (CFD) data, and the third is a shock-expansion model. Four models for heat flux are investigated: a kriging interpolant of RANS CFD; an Eckert's reference temperature model using a kriging interpolant of RANS CFD pressure; an Eckert's reference temperature model using kriging interpolants of Euler CFD pressure and temperature; and an Eckert's reference temperature model using shock-expansion theory pressure and temperature. The reduced models are compared to RANS CFD predictions on the surface of a complete hypersonic vehicle over a broad operational space. The results and conclusions highlighted trade-offs in the context of accuracy and computational requirements for different types of loads models for use in multi-disciplinary simulations of high-speed vehicles. The second part of this work explores the degree of unsteadiness in integrated aerodynamic loads at representative reduced frequencies for a pitching vehicle. A typical approach is to assume unsteady aerodynamic loads as either steady-state or quasi-steady. The former assumes that the aerodynamic loads only depend on the instantaneous inclination angle, while the latter includes a pressure perturbation due to an induced inclination angle from surface velocity. Unsteadiness in integrated aerodynamic loads is assessed at the component level and on a complete vehicle with and without viscous effects. Results indicate that both unsteadiness and the importance of viscosity in integrated aerodynamic loads increase with three-dimensionality of the flow. Three-dimensionality enhances load hysteresis due to flow unsteadiness, while fin-body flow interactions are found to increase the lift-curve slope of the dynamically pitching vehicle. Compared to a control surface in isolation, viscosity has a strong, albeit complex, influence on deviations of fully unsteady loads models from quasi-steady and steady models. The precise mechanisms that drive a relatively rapid divergence from quasi-steady flow for the complete vehicle remain inadequately understood and additional study is needed.
