Download or read book Recent Applications of CFD to the Aerodynamics of Army Projectiles written by Walter B. Sturek and published by . This book was released on 1992 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to predict the complete set of aerodynamic performance parameters for projectile configurations has been a stated goal of the Computational Aerodynamics Branch, U.S. Army Ballistic Research Laboratory. In order to achieve this goal, predictive capabilities which utilize Navier-Stokes computational techniques have been developed and applied to an extensive number of projectile configurations. A summary of code validation efforts and applications for both spin stabilized and fin stabilized projectile configurations are described. Significant progress in the predictive capability for projectile aerodynamics has been achieved through the availability of substantial supercomputer resources and modem computational techniques. Current and future research areas of interest are described and provide an indication of computer resources and code enhancements needed to continue the progress in projectile computational aerodynamics. Projectile aerodynamics, Transonic flow, Finned projectile aerodynamics, Supersonic flow, Turbulent boundary layer.
Download or read book Recent Applications of CFD to the Aerodynamics of Army Projectiles written by and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to predict the complete set of aerodynamic performance parameters for projectile configurations has been a stated goal of the Computational Aerodynamics Branch, U.S. Army Ballistic Research Laboratory. In order to achieve this goal, predictive capabilities which utilize Navier-Stokes computational techniques have been developed and applied to an extensive number of projectile configurations. A summary of code validation efforts and applications for both spin stabilized and fin stabilized projectile configurations are described. Significant progress in the predictive capability for projectile aerodynamics has been achieved through the availability of substantial supercomputer resources and modem computational techniques. Current and future research areas of interest are described and provide an indication of computer resources and code enhancements needed to continue the progress in projectile computational aerodynamics. Projectile aerodynamics, Transonic flow, Finned projectile aerodynamics, Supersonic flow, Turbulent boundary layer.
Download or read book The 2002 Version of the Aeroprediction Code written by Frankie Gale Moore and published by . This book was released on 2002 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new version of the aeroprediction code (APC), the AP02, has been developed to address the requirements arising from advanced weapon concepts. The AP02 was formed by adding significant new technology and several productivity improvements to the previous version of the APC, the AP98. New technology added included 6 and 8 fin aerodynamics, improved nonlinear aerodynamics, improved pitch damping predictions, improved power-on base drag estimates, base-bleed effect on base drag estimation, improved axial force of nonaxisymmetric bodies and trailing-edge flap capability. Other improvements and productivity enhancements include an aerodynamic smoother, ballistic and three degree-of-freedom simulation modules as well as refinements for the pre- and post-processor for inputs and outputs of the AP02. Comparison of the predicted aerodynamics of the AP02 to AP98 and experimental data showed the AP02 to be slightly better than the AP98 in most cases that both codes would handle. However, due to the additional new technology incorporated into the AP02, many new options are available in the AP02 that are not available in the AP98. Therefore, the AP02 is more robust and, on average, is slightly more accurate than the AP98 in predicting aerodynamics of weapons.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book 39th AIAA Aerospace Sciences Meeting and Exhibit written by and published by . This book was released on 2001 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 92 4338 to 92 4494 written by and published by . This book was released on 1992 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design for Control of Projectile Flight Characteristics written by United States. Army Materiel Command and published by . This book was released on 1966 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook presents a general survey of the principal factors affecting the flight of projectiles, and describes the methods commonly used for predicting and influencing the flight performance. The coefficients which characterize the aerodynamic forces and moments of a moving body are identified, methods for determining the coefficients applicable to a projectile having a given shape and center of gravity location are described, and the coefficients of a number of projectiles and projectile shapes are given. The use of aerodynamic coefficients in predicting stability, range and accuracy is described. The effects of variations in projectile shape and center of gravity location on range, accuracy and lethality are discussed. Some material on prototype testing and the effects of round-to-round variations in production lots is presented.
Download or read book 31st Aerospace Sciences Meeting and Exhibit 93 0500 93 0539 written by and published by . This book was released on 1993 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computation of the Roll Characteristics of Finned Projectiles written by and published by . This book was released on 1988 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Computational Aerodynamics Branch, Launch and Flight Division has been actively developing the capability to predict the aerodynamics of US Army projectiles using Computational Fluid Dynamics (CFD) techniques. Currently under development is the capability to predict the supersonic aerodynamics of finned projectiles such as kinetic energy (KE) penetrators. In the current research effort, several important aerodynamic parameters which influence the roll characteristics of a fielded kinetic energy projectile (M735) have been predicted using CFD techniques. These parameters include the roll producing moment (at zero spin rate), the roll damping moment, and the equilibrium spin rate, defined as the spin rate for which the net roll moment is zero. Viscous CFD computations have been performed over a range of Mach numbers and spin rates using the US Army's Cray-2 supercomputer located at the Ballistic Research Laboratory. The computed results have been used to benchmark and validate engineering approaches for computing these aerodynamics coefficients.
Download or read book 92 4550 to 92 4631 written by and published by . This book was released on 1992 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Ballistics III written by C. A. Brebbia and published by WIT Press. This book was released on 2007 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Containing the proceedings of the Third International Conference on Computational Ballistics, this book presents new ideas and advanced developments in the field of study of Computational Ballistics. Ballistic studies include applications as varied as the study of the structural and control behavior of rockets and communication satellites; bird strike effects on commercial aircraft, terrorist attacks and automobile crack worthiness modelling. Many basic problems of ballistics are similar to those in other fields of applications, such as combustion, heat conduction, in-flight structural behaviour, trajectory related issues, contact, impact, penetration, structural response to shock waves and many others.A valuable contribution to its field, this text will be of interest to researchers involved in the different areas of computational ballistics and their relationship between computational methods and experiments. Notable topics include: Systems and Technolog; Combustion and Heat Transfer; Propellants; Fluid Dynamics; Fluid Flow and Aerodynamics; In-Flight Structural Behaviour and Material Response; Guidance and Control; Perforation and Penetration Mechanics; Fluid-structure Interaction; Experimental Mechanics/ballistic and Field Testing; High Rate Loads; Composite Material; Shock and Impact.
Download or read book 2015 2016 Assessment of the Army Research Laboratory written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-03-31 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Academies of Sciences, Engineering, and Medicine's Army Research Laboratory Technical Assessment Board (ARLTAB) provides biennial assessments of the scientific and technical quality of the research, development, and analysis programs at the Army Research Laboratory (ARL), focusing on ballistics sciences, human sciences, information sciences, materials sciences, and mechanical sciences. This biennial report summarizes the findings of the ARLTAB from the reviews conducted by the panels in 2015 and 2016 and subsumes the 2015-2016 interim report.
Download or read book AIAA 92 4361 AIAA 92 4517 written by and published by . This book was released on 1992 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993 with total page 1350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 92 4301 to 92 4413 written by and published by . This book was released on 1992 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parallel Computational Fluid Dynamics 99 written by D. Keyes and published by Elsevier. This book was released on 2000-10-18 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributed presentations were given by over 50 researchers representing the state of parallel CFD art and architecture from Asia, Europe, and North America. Major developments at the 1999 meeting were: (1) the effective use of as many as 2048 processors in implicit computations in CFD, (2) the acceptance that parallelism is now the 'easy part' of large-scale CFD compared to the difficulty of getting good per-node performance on the latest fast-clocked commodity processors with cache-based memory systems, (3) favorable prospects for Lattice-Boltzmann computations in CFD (especially for problems that Eulerian and even Lagrangian techniques do not handle well, such as two-phase flows and flows with exceedingly multiple-connected demains with a lot of holes in them, but even for conventional flows already handled well with the continuum-based approaches of PDEs), and (4) the nascent integration of optimization and very large-scale CFD. Further details of Parallel CFD'99, as well as other conferences in this series, are available at http://www.parcfd.org
Download or read book 92 4414 to 92 4549 written by and published by . This book was released on 1992 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
