Download or read book Integrated Hypersonic Aerothermoelastic Methodology for Transatmospheric Vehicle TAV thermal Protection System TPS Structural Design and Optimization written by D. D. Liu and published by . This book was released on 2002 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adaptation of ZONA unified hypersonic/supersonic method ZONA7U and its integration/development into a ZONA aerothermoelastic software system for transatmospheric vehicle (TAV)/thermal protection system (TPS) design/analysis was proven a successful tool through feasibility study with cases of a CKEM body, blunt cones, and a modeled X-34 wing body. Preceding the feasibility study, substantial effort was directed toward further development of a new code, ZSTREAM, and using it and ZABRO to replace the outdated modules in SHVD, thus to couple them with SHABP for aerothermoelastic applications. In the feasibility study, the cases are well validated with FD solutions. Next, computed heat rates by applying ZONA aerothermoelastic software to X-34 through two assigned hypersonic trajectories were shown and found to agree with those using MINIVER. A potential TPS design procedure was established using the obtained heat rates as an input to MINIVER, resulting in a minimum weight TPS per hot-wall consideration. With FEM/TRIM modules, ASTROS* yields the trim solution and stress distribution for a flexible X-34 at a typical trajectory joint, demonstrating the multifunctionality in MDO for the aerothermoelastic software.
Download or read book Integrated Hypersonic Aerothermoelastic Methodology for Trans Atmospheric Vehicle TAV Thermal Protection System TPS Structural Design and Optimization Thermal Protection System Optimization TPSOPT written by and published by . This book was released on 2006 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was developed under a SBIR contract. The objective of this project was to develop a hypersonic aerothermoelastic methodology that optimizes the Thermal Protection System (TPS) for the Trans Atmospheric Vehicles (TAV) in the re-entry/maneuver flight phases. The outcome of this project is a Thermal Protection System Optimization (TPSOPT) software system that integrates multiple disciplines, including the hypersonic aerodynamics, aerothermodynamics, heat transfer, aeroelasticity, with an automatic optimization technique for the minimum weight design of the TPS while subjected to the temperature constraints. A proper orthogonal decomposition and response surface method (PODIRSM) has also been integrated into the TPSOPT system to accelerate the aerodynamic data generation process. There are three manuals generated for the TPSOPT, namely the TPSOPT Theoretical Manual, the TPSOPT Users Manual and the TPSOPT Applications Manual. The design capability of the TPSOPT system is demonstrated on two wing-body configurations including the X-34 and Micro-X vehicles and is documented in the TPSOPT Applications Manual. In addition, a ZONAIR-Adaptive Modeling Environment (ZONAIR-AME) using the Adaptive Modeling Language (AML) was developed by TechnoSoft, Inc. ZONAIR-AME is expedient aerodynamic mesh generation tool that allows varying of parametric geometry for rapid assessment of aerodynamic design concept.
Download or read book Control oriented Analysis of Aerothermoelastic Effects for a Hypersonic Vehicle written by Sanketh Bhat and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Hypersonic flight is seen as a feasible solution to make space travel faster, safer and more affordable. The design of the Air-breathing hypersonic vehicle is such that there is coupling between the structure and the propulsion system. Therefore, the aerodynamic, propulsion and the structural effects must be accounted to effectively model the vehicle. The vibrations from the structure affect the performance of the vehicle. Hence, vibration attenuation is a critical requirement for hypersonic vehicles. The problems of vibration are compounded by variations in heating during flight. Structural variations resulting from the tremendous heating incurred during hypersonic flight is mitigated by a thermal protection system (TPS); however, such mitigation is accompanied by an increase in weight that can be prohibitive. The actual design of a thermal protection system can be chosen to vary the level of heating reduction, and associated weight, across the structure.
Download or read book Modeling and Analysis of Fluid Thermal Structure Coupling Problems for Hypersonic Vehicles written by Fang Chen and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To efficiently model fluid-thermal-structural problems for thermal protection design of hypersonic vehicles, a framework of Hypersonic Computational Coupling Dynamics (HyCCD) software integrates an independently developed program solving hypersonic aerthermodynamic simulation with a finite element analysis professional software. With the mathematical and physical description of multi-physics coupling mechanism, the corresponding efficient coupling strategies were proposed. Some representative coupling problems encountered in hypersonic vehicle were systematically analyzed to study the intrinsic fluid-thermal-structural coupling characteristics and mechanisms. The results can theoretically and technically support the studies on comprehensive performance assessment and optimization of thermal protection system and static or dynamic aerothermoelastic problem of hypersonic vehicles.
Download or read book 41st AIAA Aerospace Sciences Meeting Exhibit written by and published by . This book was released on 2003 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Infused Reduced Order Modeling of Aerothermal Loads for Fluid Thermal Structural Interactions written by Carlos Vargas Venegas and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although considerable advancements have been made during the past several decades in hypersonic vehicle technologies, there are still numerous unresolved experimental and computational challenges that limit practical and affordable hypersonic flight. One of the main challenges is associated to the accurate and robust computational modeling of the flow surrounding the hypersonic vehicle. The prediction of aerothermal loads over a hypersonic structure during sustained atmospheric flight is critical for the design, analysis and optimization of structures for this class of vehicles. Due to the high-energy physics encountered at hypersonic speeds, the computational modeling and coupling of structural dynamics, heat transfer, and hypersonic aerothermodynamics, viz. aerothermoelasticity (ATE), becomes a challenging phenomenon to resolve computationally. Reduced-order models (ROMs) and surrogates are typical approaches to reducing the computational cost of hypersonic aerothermoelasticity simulations to a tractable level, while maintaining a desirable level of accuracy. While ROMs tend to accelerate predictions by several orders of magnitude, they still suffer from limitations that prohibit their practical use in real-world applications. In this thesis, a new physics-infused reduced-order modeling (PIROM) methodology is presented which leverages from field inversion and machine learning (FIML) techniques to improve first-principle-based low-fidelity physical models. In a nutshell, the PIROM performs an inference step between high-fidelity data and a low-fidelity model output to extract spatio-temporal discrepancies that can be learnt by a machine learning model in functional form. These functionals are later embedded into the low-fidelity model to inform it of the missing physics. Eventually, this process creates an augmented model, capable of high-fidelity predictions comparable to full-order models while maintaining a low computational cost. Specifically, the PIROM methodology is adopted to generate an improved ROM capable of accelerated and accurate hypersonic aerothermal load prediction for arbitrary thermal and elastic responses from a skin panel structure. On the practical side, the PIROM methodology is used to predict pressure and heat flux loads in a fully-coupled hypersonic aerothermoelastic simulation for a two-dimensional skin panel configuration; a typical structure in hypersonic vehicles. Numerous structural boundary conditions are considered to assess the generalization capabilities of the PIROM. These boundary conditions include clamped, spring, simply-supported, and combinations of these. Specifically, the results of this thesis demonstrate how the PIROM approach can considerably enhance the predictive capabilities of the low-fidelity turbulent-viscous inviscid (TVI) interaction model for aerothermal load prediction, and obtain an efficient and robust augmented TVI (ATVI) model, which is practical in high-fidelity analysis and design of hypersonic structures.
Download or read book Probabilistic Heat Transfer Problems in Thermal Protection Systems written by Kun Zhang and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal protecti.on system (TPS) is one of the most important subsystems of hypersonic vehicles which are subjected to severe aerodynamic heating. The reliability and structural integrity of TPS are crucial to the structural safety and integrity of hypersonic aircrafts. During the design and service stages of the TPS, there are numerous inevitable uncertainties in aerothermal environment, material properties, manufacture and assembly errors, analysis modeling errors, et cetera, which have great impact on the reliability assessment of the TPS. In this chapter, the probabilistic heat transfer for TPS is presented to achieve light-weight TPS with high reliability. The uncertainties and their modeling and sampling methods are introduced at first. Then the finite element model and the precise integration method for transient probabilistic heat transfer of TPS are given. Based on the theoretical and numerical methods, the probabilistic design and reliability assessment procedure for TPS are finally formed. A typical multilayer ceramic composite material TPS is used as example to show the effectiveness of the proposed method.
Download or read book Hypersonic Vehicles written by Giuseppe Pezzella and published by BoD – Books on Demand. This book was released on 2019-10-02 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the aviation field there is great interest in high-speed vehicle design. Hypersonic vehicles represent the next frontier of passenger transportation to and from space. However, several design issues must be addressed, including vehicle aerodynamics and aerothermodynamics, aeroshape design optimization, aerodynamic heating, boundary layer transition, and so on. This book contains valuable contributions focusing on hypervelocity aircraft design. Topics covered include hypersonic aircraft aerodynamic and aerothermodynamic design, especially aeroshape design optimization, computational fluid dynamics, and scramjet propulsion. The book also discusses high-speed flow issues and the challenges to achieving the dream of affordable hypersonic travel. It is hoped that the information contained herein will allow for the development of safe and efficient hypersonic vehicles.
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.
Download or read book Structural Analysis of a Conceptual Structurally Integrated Acreage Thermal Protection System for Hypersonic Vehicles written by Gregory J. Toland and published by . This book was released on 2009 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Protection Modeling of Hypersonic Flying Apparatus written by A.S. Yakimov and published by Springer. This book was released on 2018-03-31 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to studies of unsteady heat and mass exchange processes taking into account thermochemical destruction of thermal protective materials, research of transpiration cooling systems, thermal protection of composite materials exposed to low-energy disturbances, as well as the numerical solution of heat and mass transfer of the exchange. It proposes several mathematical models of passive and active thermal protection systems with regard to factors such as surface ablation, surface roughness, phase transition of a liquid in porous materials, rotation of the body around its longitudinal axis, and exposure to low-energy disturbances. The author studies the possibilities to control thermochemical destruction and heat mass exchange processes in transpiration cooling systems exposed to low-energy disturbances. The numerical analysis of the heat and mass exchange process in carbon plastics under repeated impulse action is also presented. The numerical solutions of problems are compared with the known experimental data. The book is intended for specialists in the field of thermal protection and heat mass exchange, as well as graduate and undergraduates in physics and mathematics.
Download or read book Hypersonic Airframe Structures Technology Needs and Flight Test Requirements written by J. E. Stone and published by . This book was released on 1979 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Protection System Optimization for a Hypersonic Aerospace Vehicle written by Peter K. Shih and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Hypersonic Vehicle Synthesis with Application to Studies of Advanced Thermal Protection System written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the work entitled 'Advances in Hypersonic Vehicle Synthesis with Application to Studies of Advanced Thermal Protection Systems.' The effort was in two areas: (1) development of advanced methods of trajectory and propulsion system optimization; and (2) development of advanced methods of structural weight estimation. The majority of the effort was spent in the trajectory area. Ardema, Mark D. Unspecified Center...
Download or read book Aerothermoelastic Considerations for a Control Surface on an Air breathing Hypersonic Vehicle written by Benjamin R. Szpak and published by . This book was released on 2009 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Air-breathing hypersonic vehicles have risen to the forefront of the aerospace research community in reaction to the requirements of NASA and the US Air Force. NASA has interest in developing a next generation Reusable Launch Vehicle and the US Air Force is interested in an unmanned hypersonic vehicle. Recent research has focused on developing comprehensive models in order to successfully design a vehicle capable of operating in the severe hypersonic environment. Due to the layout of this class of vehicle, where the propulsion system is fully integrated into the lifting body fuselage, a tight coupling exists between the airframe, propulsion system, control system, and aerodynamics. This characteristic necessitates a multi-disciplinary approach to modeling for control design. To achieve this, a simplified model of each subsystem is needed to efficiently perform a multi-disciplinary analysis. Two important and challenging areas for multi-disciplinary modeling are the incorporation of complex aerodynamic and aerothermoelastic phenomena. The focus of this research is on the development of a model for the control surface. Specifically an aerothermoelastic model, based on a plate representation, has been developed for the vehicle control surface. This model was adapted from a previous model, developed at the Air Force Research Laboratory, to incorporate important characteristics such as taper and sweep of the control surface. Thus, the model more realistically represents the geometry of a control surface for a hypersonic vehicle. The structural model developed was then verified using finite element analysis to compare the free vibration frequencies and modeshapes. Since the structural dynamic characteristics of a solid plate are not compatible to those of a shell structured wing, the structural properties were modified to match the first two frequencies of a representative wing, namely the F-104 Lockheed Starfighter wing. As the temperature of a plate increases, the first two frequencies begin to coalesce. This coalescence of frequencies leads to a phenomena known as flutter. As the temperature of the plate was increased the aerothermoelastic response was computed at a constant Mach number until the onset of flutter. By implementing a flexible control surface model, the response of the wing to control inputs and fuselage deformations could also be investigated. Both of these effects are modeled as base motion of the cantilevered plate. Second order piston theory, a commonly used model for hypersonic aerodynamics, was used to calculate the aerodynamic forces on the plate. Results presented provide insight into the importance of aerothermoelastic effects for control oriented modeling, as well as the effect of plate sweep and taper compared to a simple square plate representation.
Download or read book Thermal Protection of Structural Propulsion and Temperature sensitive Materials for Hypersonic and Space Flight written by William P. Manos and published by . This book was released on 1960 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Some Hypersonic Vehicles Technologies written by Ramesh K. Agarwal and published by BoD – Books on Demand. This book was released on 2018-03-14 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes the recent progress in some hypersonic technologies such as the aerodynamic modeling and numerical simulations of rarefied flows, boundary layer receptivity, coupled aerodynamics, and heat transfer problems, including fluid-thermal-structure interactions and launcher aerodynamic design as well as other miscellaneous topics, such as porous ceramic composite phase change control system and vehicle profile, following LQR design. Both the researchers and the students should find the material useful in their work.
