Download or read book Computational Sensitivity Analysis for the Aerodynamic Design of Supersonic and Hypersonic Air Vehicles written by Arthur Stevens and published by . This book was released on 2015 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conceptual design of hypersonic air vehicles relies on computational methods to produce estimates of aerodynamic, structural, thermal protection, and propulsion design requirements. Solving the design optimization problem presented by these competing requirements using traditional low-fidelity vehicle models and flow simulations is inadequate because these models represent the underlying physics of the combined disciplines poorly. In order to assess the potential of using physically-accurate flow simulation tools and high-resolution geometry modeling tools in the conceptual design stage, the sensitivity of a hypersonic air vehicle's lift-to-drag ratio to geometric variations was calculated using a computational framework developed for this project. The framework is unique in its integration of modern design tools such as parametric vehicle geometry models, Eulerian flow simulations with automated volumetric mesh generation and refinement, Kriging response surface generation, and global sensitivity analysis. The sensitivity of a hypersonic vehicle's lift-to-drag ratio to changes in two planform parameters was completed and demonstrated the capabilities of the framework to perform global sensitivity analyses. When the design space was extended to nine geometric parameters, the initial application of the framework failed and the results of the global sensitivity analysis were inconclusive.
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 A Computational System for Aerodynamic Design and Analysis of Supersonic Aircraft written by Wilbur D. Middleton and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A computational system for aerodynamic design and analysis of supersonic aircraft written by Wilbur D. Middleton and published by . This book was released on 1976 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Computational System for Aerodynamic Design and Analysis of Supersonic Aircraft Part 1 General Description and Theoretical Development written by and published by . This book was released on 1976 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Computational System for Aerodynamic Design and Analysis of Supersonic Aircraft General description and theoretical development written by Wilbur D. Middleton and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sensitivity Analysis for Coupled Aero structural Systems written by Anthony A. Giunta and published by . This book was released on 1999 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel method has been developed for calculating gradients of aerodynamic force and moment coefficients for an aeroelastic aircraft model. This method uses the Global Sensitivity Equations (GSE) to account for the aero-structural coupling, and a reduced-order modal analysis approach to condense the coupling bandwidth between the aerodynamic and structural models. Parallel computing is applied to reduce the computational expense of the numerous high fidelity aerodynamic analyses needed for the coupled aero-structural system. Good agreement is obtained between aerodynamic force and moment gradients computed with the GSE/modal analysis approach and the same quantities computed using the brute-force, computationally expensive, finite difference approximations. A comparison between the computational expense of the GSE/modal analysis method and a pure finite difference is presented. These results show that the GSE/modal analysis approach is the more computationally efficient technique if sensitivity analysis is to be performed for two or more aircraft design parameters.
Download or read book A computational system for aerodynamic design and analysis of supersonic aircraft written by Wilbur D. Middleton and published by . This book was released on 1976 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A computational system for aerodynamic design and analysis of supersonic aircraft written by Wilbur D. Middleton and published by . This book was released on 1976 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Computational System for Aerodynamic Design and Analysis of Supersonic Aircraft Part 3 Computer Program Description written by and published by . This book was released on 1976 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Computational System for Aerodynamic Design and Analysis of Supersonic Aircraft Part 2 User s Manual written by and published by . This book was released on 1976 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Computational System for Aerodynamic Design and Analysis of Supersonic Aircraft Computer program description written by Wilbur D. Middleton and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Computational System for Aerodynamic Design and Analysis of Supersonic Aircraft User s manual written by Wilbur D. Middleton and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Analysis and Design Optimization Methods for Nozzle Afterbody of a Hypersonic Vehicle written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the methods developed for the aerodynamic analysis and the shape optimization of the nozzle-afterbody section of a hypersonic vehicle. Initially, exhaust gases were assumed to be air. Internal-external flows around a single scramjet module were analyzed by solving the three dimensional Navier-Stokes equations. Then, exhaust gases were simulated by a cold mixture of Freon and Argon. Two different models were used to compute these multispecies flows as they mixed with the hypersonic airflow. Surface and off-surface properties were successfully compared with the experimental data. In the second phase of this project, the Aerodynamic Design Optimization with Sensitivity analysis (ADOS) was developed. Pre and post optimization sensitivity coefficients were derived and used in this quasi-analytical method. These coefficients were also used to predict inexpensively the flow field around a changed shape when the flow field of an unchanged shape was given. Starting with totally arbitrary initial afterbody shapes, independent computations were converged to the same optimum shape, which rendered the maximum axial thrust. Baysal, Oktay Unspecified Center...
Download or read book Computational Mechanics Approach for Multidisciplinary Nonlinear Sensitivity Analysis written by R. V. Grandhi and published by . This book was released on 2001 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Super and Hypersonic Aerodynamics and Heat Transfer written by V.Z. Parton and published by Routledge. This book was released on 2018-03-29 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent government and commercial efforts to develop orbital and suborbital passenger and transport aircraft have resulted in a burgeoning of new research. The articles in this book, translated from Russian, were contributed by the world's leading authorities on supersonic and hypersonic flows and heat transfer. This superb book addresses the physics and engineering aspects of ultra high-speed aerodynamic problems. Thorough coverage is given to an array of specific problem-solving equations. Super- and Hypersonic Aerodynamics and Heat Transfer will be essential reading for all aeronautical engineers, mechanical engineers, mathematicians, and physicists involved in this exciting field of research.
Download or read book Prediction and Validation Technologies of Aerodynamic Force and Heat for Hypersonic Vehicle Design written by Min Zhao and published by Springer Nature. This book was released on 2021-03-01 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of advanced prediction and verification technologies for aerodynamics and aerothermodynamics and assesses a number of critical issues in advanced hypersonic vehicle design. Focusing on state-of-the-art theories and promising technologies for engineering applications, it also presents a range of representative practical test cases. Given its scope, the book offers a valuable asset for researchers who are interested in thermodynamics, aircraft design, wind tunnel testing, fluid dynamics and aerothermodynamics research methods, introducing them to inspiring new research topics.
