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Author : Xiaojian Wang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Optimization of Ram Accelerator Systems Design written by Xiaojian Wang and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kazuyoshi Takayama
Publisher : Springer Science & Business Media
ISBN 13 : 3642468764
Total Pages : 337 pages
Book Rating : 4.6/5 (424 download)
Download or read book Ram Accelerators written by Kazuyoshi Takayama and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ram accelerators are among the most advanced tools for generating fluid dynamcis data in supersonic reacting systems. They require the combined action of combustion, wave systems and turbulence and are still a serious challenge for physicists and engineers. This book will serve as an introductionary textbook on ram accelerators and gives a thorough overview on research activities, performance modeling and high-pressure detonation dynamics.
Author : Xiaojian Wang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Numerical Study of Design Optimization and Operational Limits in Super-detonative Ram Accelerators written by Xiaojian Wang and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael Aarnio
Publisher :
ISBN 13 :
Total Pages : 189 pages
Book Rating : 4.:/5 (977 download)
Download or read book Design of a Ram Accelerator Mass Launch System written by Michael Aarnio and published by . This book was released on 1988 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (727 download)
Download or read book Design and Optimization of Large Accelerator Systems Through High-Fidelity Electromagnetic Simulations written by and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781723554728
Total Pages : 208 pages
Book Rating : 4.5/5 (547 download)
Download or read book Design of a Ram Accelerator Mass Launch System written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-24 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ram accelerator mass launch system has been proposed to greatly reduce the costs of placing acceleration-insensitive payloads into low earth orbit. The ram accelerator is a chemically propelled, impulsive mass launch system capable of efficiently accelerating relatively large masses from velocities of 0.7 km/sec to 10 km/sec. The principles of propulsion are based on those of a conventional supersonic air-breathing ramjet; however the device operates in a somewhat different manner. The payload carrying vehicle resembles the center-body of the ramjet and accelerates through a stationary tube which acts as the outer cowling. The tube is filled with premixed gaseous fuel and oxidizer mixtures that burn in the vicinity of the vehicle's base, producing a thrust which accelerates the vehicle through the tube. This study examines the requirement for placing a 2000 kg vehicle into a 500 km circular orbit with a minimum amount of on-board rocket propellant for orbital maneuvers. The goal is to achieve a 50 pct payload mass fraction. The proposed design requirements have several self-imposed constraints that define the vehicle and tube configurations. Structural considerations on the vehicle and tube wall dictate an upper acceleration limit of 1000 g's and a tube inside diameter of 1.0 m. In-tube propulsive requirements and vehicle structural constraints result in a vehicle diameter of 0.76 m, a total length of 7.5 m and a nose-cone half angle of 7 degrees. An ablating nose-cone constructed from carbon-carbon composite serves as the thermal protection mechanism for atmospheric transit. Aarnio, Michael and Armerding, Calvin and Berschauer, Andrew and Christofferson, Erik and Clement, Paul and Gohd, Robin and Neely, Bret and Reed, David and Rodriguez, Carlos and Swanstrom, Fredrick Unspecified Center NASA-CR-184748, NAS 1.26:184748 NGT-21-002-080...
Author : Rajendran Raja
Publisher : World Scientific
ISBN 13 : 9814317284
Total Pages : 361 pages
Book Rating : 4.8/5 (143 download)
Download or read book Proceedings of the Workshop on Applications of High Intensity Proton Accelerators written by Rajendran Raja and published by World Scientific. This book was released on 2010 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume captures the contents of the talks given at the Workshop on Applications of High Intensity Proton Accelerators held at Fermilab Oct 19ndash;21, 2009. This workshop brought together experts from a variety of disciplines to explore new and profound ways proton accelerators can be used in the future. The workshop explored uses of such a proton source for producing intense muon, kaon and neutrino beams as well as using the intense protons for new forms of nuclear reactors that go by the name Accelerator Driven Sub-critical systems that promise to increase our available nuclear fuel supply by orders of magnitude while at the same time solving the nuclear waste problem. Intense proton beams can also be used to produce short-lived nuclear isotopes that are important in the medical industry.
Author : Lars Wehmeyer
Publisher : Springer Science & Business Media
ISBN 13 : 140204822X
Total Pages : 263 pages
Book Rating : 4.4/5 (2 download)
Download or read book Fast, Efficient and Predictable Memory Accesses written by Lars Wehmeyer and published by Springer Science & Business Media. This book was released on 2006-09-08 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speed improvements in memory systems have not kept pace with the speed improvements of processors, leading to embedded systems whose performance is limited by the memory. This book presents design techniques for fast, energy-efficient and timing-predictable memory systems that achieve high performance and low energy consumption. In addition, the use of scratchpad memories significantly improves the timing predictability of the entire system, leading to tighter worst case execution time bounds.
Author :
Publisher :
ISBN 13 :
Total Pages : 980 pages
Book Rating : 4.F/5 ( download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dino Quintero
Publisher : IBM Redbooks
ISBN 13 : 0738441686
Total Pages : 294 pages
Book Rating : 4.7/5 (384 download)
Download or read book Implementing an Optimized Analytics Solution on IBM Power Systems written by Dino Quintero and published by IBM Redbooks. This book was released on 2016-06-01 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This IBM® Redbooks® publication addresses topics to use the virtualization strengths of the IBM POWER8® platform to solve clients' system resource utilization challenges and maximize systems' throughput and capacity. This book addresses performance tuning topics that will help answer clients' complex analytic workload requirements, help maximize systems' resources, and provide expert-level documentation to transfer the how-to-skills to the worldwide teams. This book strengthens the position of IBM Analytics and Big Data solutions with a well-defined and documented deployment model within a POWER8 virtualized environment, offering clients a planned foundation for security, scaling, capacity, resilience, and optimization for analytics workloads. This book is targeted toward technical professionals (analytics consultants, technical support staff, IT Architects, and IT Specialists) who are responsible for providing analytics solutions and support on IBM Power SystemsTM.
Author : Brian J. Leege
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Advances in Baffled and Railed Tube Ram Accelerator Operation and Modeling written by Brian J. Leege and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ram accelerator is a novel chemical propulsion device capable of accelerating projectiles up to orbital velocities. It utilizes a ramjet-like propulsive cycle, where a projectile travels through a stationary tube filled with a gaseous propellant, experiencing high levels of thrust throughout the tube. The projectile carries no onboard propellant and has no moving parts. This makes the ram accelerator a relatively simple, more efficient, and high-performance alternative to guns and rockets for a first stage launch system. While originally developed to utilize finned-projectiles in a smooth bored tube, additional ram accelerator configurations have been developed to accommodate axisymmetric projectiles in baffled and railed tubes (the BTRA and RTRA). These newer configurations allow for a more practical implementation of ram accelerator technology in numerous applications and have been found to expand the capabilities of ram accelerator systems. This dissertation includes a comprehensive experimental study of the BTRA, RTRA, and two newly invented ram accelerator configurations, as well as the development of a new computational model for BTRA and RTRA operation. The experimental effort focused on the testing of newly developed BTRA and RTRA hardware, a survey of viable BTRA propellants, and the development of two new ram accelerator configurations: the RTRA with sweeper baffles and the baffled start stage (BSS). The BTRA testing discovered that smaller diameter baffle chambers are capable of producing higher thrust with higher efficiency, while larger diameter baffle chambers allow for operation at lower Mach numbers. The BTRA has now been demonstrated to operate at as low as Mach 1.85. The RTRA was found to achieve significantly higher thrust and efficiency than the BTRA, while requiring higher Mach numbers for operation. The new RTRA with sweeper baffles concept was shown to be a viable ram configuration for improving the performance and expanding the operational envelope of an RTRA. The newly developed BSS was shown to be a good technology for producing ram starts without the typical use of an obturator. The new computational model, called the ram accelerator plug flow reactor (PFR) model, proved to be a significant advancement in the modeling of ram accelerator operation. The ram PFR model is a quasi-1D model that resolves the entire ram flowpath. It includes a model for the effects of baffles on the ram flowfield, accommodates real projectile geometries as used in experiments, and includes corrections for the non-inertial projectile reference frame. The new ram PFR model is able to predict the operational envelopes of the BTRA with remarkable accuracy and will now serve as a valuable tool in the development of future ram accelerator configurations.
Author : Orr Dunkelman
Publisher : Springer Nature
ISBN 13 : 3030816524
Total Pages : 727 pages
Book Rating : 4.0/5 (38 download)
Download or read book Selected Areas in Cryptography written by Orr Dunkelman and published by Springer Nature. This book was released on 2021-07-20 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains revised selected papers from the 27th International Conference on Selected Areas in Cryptography, SAC 2020, held in Halifax, Nova Scotia, Canada in October 2020. The 27 full papers presented in this volume were carefully reviewed and selected from 52 submissions. They cover the following research areas: design and analysis of symmetric key primitives and cryptosystems, including block and stream ciphers, hash functions, MAC algorithms, and authenticated encryption schemes, efficient implementations of symmetric and public key algorithms, mathematical and algorithmic aspects of applied cryptology, and secure elections and related cryptographic constructions
Author :
Publisher :
ISBN 13 :
Total Pages : 1198 pages
Book Rating : 4.U/5 (183 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (3 download)
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1988 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 348 pages
Book Rating : 4.3/5 (243 download)
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xiaojian Wang
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (87 download)
Download or read book Optimal Design of Superdetonative Ram Accelerators for Hypersonic Velocities written by Xiaojian Wang and published by . This book was released on 1998 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
