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Euler Technology Assessment For Preliminary Aircraft Design Unstructured Structured Grid Nastd Application For Aerodynamic Analysis Of An Advanced Fighter Tailless Configuration
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Book Synopsis Euler Technology Assessment for Preliminary Aircraft Design-Unstructured/Structured Grid NASTD Application for Aerodynamic Analysis of an Advanced Fighter/Tailless Configuration by : Todd R. Michal
Download or read book Euler Technology Assessment for Preliminary Aircraft Design-Unstructured/Structured Grid NASTD Application for Aerodynamic Analysis of an Advanced Fighter/Tailless Configuration written by Todd R. Michal and published by . This book was released on 1998 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722378486 Total Pages :54 pages Book Rating :4.3/5 (784 download)
Book Synopsis Euler Technology Assessment for Preliminary Aircraft Design-Unstructured/Structured Grid Nastd Application for Aerodynamic Analysis of an Advanced Fighter/Tailless Configuration by : National Aeronautics and Space Administration (NASA)
Download or read book Euler Technology Assessment for Preliminary Aircraft Design-Unstructured/Structured Grid Nastd Application for Aerodynamic Analysis of an Advanced Fighter/Tailless Configuration 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 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study supports the NASA Langley sponsored project aimed at determining the viability of using Euler technology for preliminary design use. The primary objective of this study was to assess the accuracy and efficiency of the Boeing, St. Louis unstructured grid flow field analysis system, consisting of the MACGS grid generation and NASTD flow solver codes. Euler solutions about the Aero Configuration/Weapons Fighter Technology (ACWFT) 1204 aircraft configuration were generated. Several variations of the geometry were investigated including a standard wing, cambered wing, deflected elevon, and deflected body flap. A wide range of flow conditions, most of which were in the non-linear regimes of the flight envelope, including variations in speed (subsonic, transonic, supersonic), angles of attack, and sideslip were investigated. Several flowfield non-linearities were present in these solutions including shock waves, vortical flows and the resulting interactions. The accuracy of this method was evaluated by comparing solutions with test data and Navier-Stokes solutions. The ability to accurately predict lateral-directional characteristics and control effectiveness was investigated by computing solutions with sideslip, and with deflected control surfaces. Problem set up times and computational resource requirements were documented and used to evaluate the efficiency of this approach for use in the fast paced preliminary design environment. Michal, Todd R. Langley Research Center...
Book Synopsis NASA Langley Scientific and Technical Information Output: 1998 by :
Download or read book NASA Langley Scientific and Technical Information Output: 1998 written by and published by . This book was released on 1999 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723044540 Total Pages :102 pages Book Rating :4.0/5 (445 download)
Book Synopsis Euler Technology Assessment for Preliminary Aircraft Design by : National Aeronautics and Space Administration (NASA)
Download or read book Euler Technology Assessment for Preliminary Aircraft Design written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the second phase of the Euler Technology Assessment program was to evaluate the ability of Euler computational fluid dynamics codes to predict compressible flow effects over a generic fighter wind tunnel model. This portion of the study was conducted by Lockheed Martin Tactical Aircraft Systems, using an in-house Cartesian-grid code called SPLITFLOW. The Cartesian grid technique offers several advantages, including ease of volume grid generation and reduced number of cells compared to other grid schemes. SPLITFLOW also includes grid adaption of the volume grid during the solution to resolve high-gradient regions. The SPLITFLOW code predictions of configuration forces and moments are shown to be adequate for preliminary design, including predictions of sideslip effects and the effects of geometry variations at low and high angles-of-attack. The transonic pressure prediction capabilities of SPLITFLOW are shown to be improved over subsonic comparisons. The time required to generate the results from initial surface data is on the order of several hours, including grid generation, which is compatible with the needs of the design environment. Finley, Dennis B. and Karman, Steve L., Jr. Langley Research Center COMPRESSIBILITY EFFECTS; COMPUTATIONAL FLUID DYNAMICS; EULER EQUATIONS OF MOTION; UNSTRUCTURED GRIDS (MATHEMATICS); CARTESIAN COORDINATES; TRANSONIC FLOW; VORTICES; ANGLE OF ATTACK; GRID GENERATION (MATHEMATICS); SIDESLIP; PRESSURE DISTRIBUTION; AERODYNAMIC LOADS; FIGHTER AIRCRAFT...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722378554 Total Pages :100 pages Book Rating :4.3/5 (785 download)
Book Synopsis Euler Technology Assessment Program for Preliminary Aircraft Design Employing Splitflow Code with Cartesian Unstructured Grid Method by : National Aeronautics and Space Administration (NASA)
Download or read book Euler Technology Assessment Program for Preliminary Aircraft Design Employing Splitflow Code with Cartesian Unstructured Grid Method 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 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents results from the Euler Technology Assessment program. The objective was to evaluate the efficacy of Euler computational fluid dynamics (CFD) codes for use in preliminary aircraft design. Both the accuracy of the predictions and the rapidity of calculations were to be assessed. This portion of the study was conducted by Lockheed Fort Worth Company, using a recently developed in-house Cartesian-grid code called SPLITFLOW. The Cartesian grid technique offers several advantages for this study, including ease of volume grid generation and reduced number of cells compared to other grid schemes. SPLITFLOW also includes grid adaptation of the volume grid during the solution convergence to resolve high-gradient flow regions. This proved beneficial in resolving the large vortical structures in the flow for several configurations examined in the present study. The SPLITFLOW code predictions of the configuration forces and moments are shown to be adequate for preliminary design analysis, including predictions of sideslip effects and the effects of geometry variations at low and high angles of attack. The time required to generate the results from initial surface definition is on the order of several hours, including grid generation, which is compatible with the needs of the design environment. Finley, Dennis B. Unspecified Center...
Book Synopsis Introduction to Nonlinear Aeroelasticity by : Grigorios Dimitriadis
Download or read book Introduction to Nonlinear Aeroelasticity written by Grigorios Dimitriadis and published by John Wiley & Sons. This book was released on 2017-03-10 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Nonlinear Aeroelasticity Introduces the latest developments and technologies in the area of nonlinear aeroelasticity Nonlinear aeroelasticity has become an increasingly popular research area in recent years. There have been many driving forces behind this development, increasingly flexible structures, nonlinear control laws, materials with nonlinear characteristics and so on. Introduction to Nonlinear Aeroelasticity covers the theoretical basics in nonlinear aeroelasticity and applies the theory to practical problems. As nonlinear aeroelasticity is a combined topic, necessitating expertise from different areas, the book introduces methodologies from a variety of disciplines such as nonlinear dynamics, bifurcation analysis, unsteady aerodynamics, non-smooth systems and others. The emphasis throughout is on the practical application of the theories and methods, so as to enable the reader to apply their newly acquired knowledge Key features: Covers the major topics in nonlinear aeroelasticity, from the galloping of cables to supersonic panel flutter Discusses nonlinear dynamics, bifurcation analysis, numerical continuation, unsteady aerodynamics and non-smooth systems Considers the practical application of the theories and methods Covers nonlinear dynamics, bifurcation analysis and numerical methods Accompanied by a website hosting Matlab code Introduction to Nonlinear Aeroelasticity is a comprehensive reference for researchers and workers in industry and is also a useful introduction to the subject for graduate and undergraduate students across engineering disciplines.
Book Synopsis ARL TR. by : Aerospace Research Laboratories (U.S.)
Download or read book ARL TR. written by Aerospace Research Laboratories (U.S.) and published by . This book was released on 1973 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CFL3D User's Manual (Version 5.0) by : Sherrie L. Krist
Download or read book CFL3D User's Manual (Version 5.0) written by Sherrie L. Krist and published by . This book was released on 1998 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723906732 Total Pages :46 pages Book Rating :4.9/5 (67 download)
Book Synopsis Unstructured Grid Euler Method Assessment for Longitudinal and Lateral/Directional Aerodynamic Performance Analysis of the Hsr Technology Concept Airplane at Supersonic Cruise Speed by : National Aeronautics and Space Adm Nasa
Download or read book Unstructured Grid Euler Method Assessment for Longitudinal and Lateral/Directional Aerodynamic Performance Analysis of the Hsr Technology Concept Airplane at Supersonic Cruise Speed written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-21 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unstructured grid Euler computations, performed at supersonic cruise speed, are presented for a High Speed Civil Transport (HSCT) configuration, designated as the Technology Concept Airplane (TCA) within the High Speed Research (HSR) Program. The numerical results are obtained for the complete TCA cruise configuration which includes the wing, fuselage, empennage, diverters, and flow through nacelles at M (sub infinity) = 2.4 for a range of angles-of-attack and sideslip. Although all the present computations are performed for the complete TCA configuration, appropriate assumptions derived from the fundamental supersonic aerodynamic principles have been made to extract aerodynamic predictions to complement the experimental data obtained from a 1.675%-scaled truncated (aft fuselage/empennage components removed) TCA model. The validity of the computational results, derived from the latter assumptions, are thoroughly addressed and discussed in detail. The computed surface and off-surface flow characteristics are analyzed and the pressure coefficient contours on the wing lower surface are shown to correlate reasonably well with the available pressure sensitive paint results, particularly, for the complex flow structures around the nacelles. The predicted longitudinal and lateral/directional performance characteristics for the truncated TCA configuration are shown to correlate very well with the corresponding wind-tunnel data across the examined range of angles-of-attack and sideslip. The complementary computational results for the longitudinal and lateral/directional performance characteristics for the complete TCA configuration are also presented along with the aerodynamic effects due to empennage components. Results are also presented to assess the computational method performance, solution sensitivity to grid refinement, and solution convergence characteristics.Ghaffari, FarhadLangley Research CenterCOMPUTATIONAL FLUID DYNAMICS; SUPERSONIC TRANSPORTS; UNSTRUCTURED GRID
Book Synopsis Computational Approaches for Aerospace Design by : Andy Keane
Download or read book Computational Approaches for Aerospace Design written by Andy Keane and published by John Wiley & Sons. This book was released on 2005-08-05 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last fifty years, the ability to carry out analysis as a precursor to decision making in engineering design has increased dramatically. In particular, the advent of modern computing systems and the development of advanced numerical methods have made computational modelling a vital tool for producing optimized designs. This text explores how computer-aided analysis has revolutionized aerospace engineering, providing a comprehensive coverage of the latest technologies underpinning advanced computational design. Worked case studies and over 500 references to the primary research literature allow the reader to gain a full understanding of the technology, giving a valuable insight into the world’s most complex engineering systems. Key Features: Includes background information on the history of aerospace design and established optimization, geometrical and mathematical modelling techniques, setting recent engineering developments in a relevant context. Examines the latest methods such as evolutionary and response surface based optimization, adjoint and numerically differentiated sensitivity codes, uncertainty analysis, and concurrent systems integration schemes using grid-based computing. Methods are illustrated with real-world applications of structural statics, dynamics and fluid mechanics to satellite, aircraft and aero-engine design problems. Senior undergraduate and postgraduate engineering students taking courses in aerospace, vehicle and engine design will find this a valuable resource. It will also be useful for practising engineers and researchers working on computational approaches to design.
Book Synopsis Aircraft Aerodynamic Design with Computational Software by : Arthur Rizzi
Download or read book Aircraft Aerodynamic Design with Computational Software written by Arthur Rizzi and published by Cambridge University Press. This book was released on 2021-05-20 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: This modern text presents aerodynamic design of aircraft with realistic applications, using CFD software and guidance on its use. Tutorials, exercises, and mini-projects provided involve design of real aircraft, ranging from straight to swept to slender wings, from low speed to supersonic. Supported by online resources and supplements, this toolkit covers topics such as shape optimization to minimize drag and collaborative designing. Prepares seniors and first-year graduate students for design and analysis tasks in aerospace companies. In addition, it is a valuable resource for practicing engineers, aircraft designers, and entrepreneurial consultants.
Book Synopsis A Gridless Euler/Navier-Stokes Solution Algorithm for Complex-aircraft Applications by :
Download or read book A Gridless Euler/Navier-Stokes Solution Algorithm for Complex-aircraft Applications written by and published by . This book was released on 1993 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Three Dimensional Grid Generation for Complex Configurations - Recent Progress by :
Download or read book Three Dimensional Grid Generation for Complex Configurations - Recent Progress written by and published by . This book was released on 1988 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This AGARDograph surveys some of the capabilities of the CFD community for griding complex three-dimensional configurations. The intent is to provide some insight as to the present state of grid generation for aircraft configurations in order to help assess whether this task presents a long term stumbling block to routine use of CFD in aerodynamic applications. This AGARDograph begins with a brief review of some of the techniques that are available for generating body-conforming curvilinear grids. In order to assess capabilities in grid generation, colleagues at selected institutions were solicited to describe their experiences and difficulties in grid generation of complex configurations. The intent here was not to describe the very latest in grid generation procedures, but to solicit honest comments about what are the difficulties in generating practical grids and what steps are taken to meet these difficulties. These experiences, which comprise the heart of this AGARDograph, are presented as case histories. Keywords: Computational fluid dynamics; Nato furnished; Aerodynamic configuration; Grids(coordinates); Computation; Computer graphics; Wing body configurations; Generating functions; Evaluation. (JHD).
Book Synopsis Three Dimensional Grid Generation for Complex Configurations by : J. F. Thompson
Download or read book Three Dimensional Grid Generation for Complex Configurations written by J. F. Thompson and published by . This book was released on 1988 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: This AGARDograph surveys some of the capabilities of the CFD community for griding complex three-dimensional configurations. The intent is to provide some insight as to the present state of grid generation for aircraft configurations in order to help assess whether this task presents a long term stumbling block to routine use of CFD in aerodynamic applications. This AGARDograph begins with a brief review of some of the techniques that are available for generating body-conforming curvilinear grids. In order to assess capabilities in grid generation, colleagues at selected institutions were solicited to describe their experiences and difficulties in grid generation of complex configurations. The intent here was not to describe the very latest in grid generation procedures, but to solicit honest comments about what are the difficulties in generating practical grids and what steps are taken to meet these difficulties. These experiences, which comprise the heart of this AGARDograph, are presented as case histories. Keywords: Computational fluid dynamics; Nato furnished; Aerodynamic configuration; Grids(coordinates); Computation; Computer graphics; Wing body configurations; Generating functions; Evaluation. (JHD).
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722063856 Total Pages :38 pages Book Rating :4.0/5 (638 download)
Book Synopsis An Assessment of the Adaptive Unstructured Tetrahedral Grid, Euler Flow Solver Code Felisa by : National Aeronautics and Space Administration (NASA)
Download or read book An Assessment of the Adaptive Unstructured Tetrahedral Grid, Euler Flow Solver Code Felisa 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 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three-dimensional solution-adaptive Euler flow solver for unstructured tetrahedral meshes is assessed, and the accuracy and efficiency of the method for predicting sonic boom pressure signatures about simple generic models are demonstrated. Comparison of computational and wind tunnel data and enhancement of numerical solutions by means of grid adaptivity are discussed. The mesh generation is based on the advancing front technique. The FELISA code consists of two solvers, the Taylor-Galerkin and the Runge-Kutta-Galerkin schemes, both of which are spacially discretized by the usual Galerkin weighted residual finite-element methods but with different explicit time-marching schemes to steady state. The solution-adaptive grid procedure is based on either remeshing or mesh refinement techniques. An alternative geometry adaptive procedure is also incorporated. Djomehri, M. Jahed and Erickson, Larry L. Ames Research Center RTOP 505-59-20...
