Download or read book Thermomechanical Simulation of an Aerogel RTV 655 Based Cryogenic Propellant Tank written by William Dalton Bowen and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing an effective solution for long duration storage of cryogenic liquids is crucial for future, manned space exploration missions. Current storage tanks are made of metals or composites. Although these materials have a relatively high mechanical strength, their high thermal conductivity is a disadvantage with regards to heat infiltration. The influx of heat causes vaporization, increasing the pressure in the tank. To reduce tank pressurization rates, novel materials with densities and thermal conductivities which are lower than metals, such as RTV-655 and aerogels, have been developed which may be feasible for space applications. Due to the complexity and costs of performing experiments, a thermomechanical computational model is desired to further study the feasibility of using these novel materials. A thermomechanical finite element simulation is used to simulate the Cooldown and Pressurization phases of RTV-655 and RTV-655/Aerogel tank experiments and a comparison of the simulation and experimental results are presented.
Download or read book Analysis of Cryogenic Propellant Tank Pressurization based upon Experiments and Numerical Simulations written by Carina Ludwig and published by Cuvillier Verlag. This book was released on 2014-09-04 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focus of this study is the pressurization system of a cryogenic liquid propellant tank for the launcher application. Objective of the pressurization system is to provide the required pressure evolution in the propellant tank for a proper operation of the engine. The motivation of this study is an improved understanding of the complex fluid-dynamic and thermodynamic phenomena during the active-pressurization process of cryogenic propellants in order to optimize the on-board pressurant gas mass. Therefore ground experiments, numerical simulations and analytical considerations were performed for the investigation of the initial active-pressurization phase. For the performed experiments, liquid nitrogen was used as cryogenic model propellant, which was actively pressurized under normal gravity conditions up to different final tank pressures. As pressurant gases, gaseous nitrogen and gaseous helium were used with different inlet temperatures. For the numerical analyses the commercial CFD program Flow-3D, a three-dimensional Navier-Stokes equation solver, was used.
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1991 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Yearbook on Space Policy 2016 written by Cenan Al-Ekabi and published by Springer. This book was released on 2018-02-22 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Yearbook on Space Policy, edited by the European Space Policy Institute (ESPI), is the reference publication analysing space policy developments. Each year it presents issues and trends in space policy and the space sector as a whole. Its scope is global and its perspective is European. The Yearbook also links space policy with other policy areas. It highlights specific events and issues, and provides useful insights, data and information on space activities. The first part of the Yearbook sets out a comprehensive overview of the economic, political, technological and institutional trends that have affected space activities. The second part of the Yearbook offers a more analytical perspective on the yearly ESPI theme and consists of external contributions written by professionals with diverse backgrounds and areas of expertise. The third part of the Yearbook carries forward the character of the Yearbook as an archive of space activities. The Yearbook is designed for government decision-makers and agencies, industry professionals, as well as the service sectors, researchers and scientists and the interested public.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Space Station Decision written by Howard E. McCurdy and published by JHU Press. This book was released on 2008-01-16 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected by Choice Magazine as an Outstanding Academic Title Outstanding Academic Title, 1991, Choice Magazine Although building a space station has been an extraordinary challenge for America's scientists and engineers, the securing and sustaining of presidential approval, congressional support, and long-term funding for the project was an enormous task for bureaucrats. The Space Station Decision examines the history of this controversial initiative and illustrates how bureaucracy shapes public policy. Using primary documents and interviews, Howard E. McCurdy describes the events that led up to the 1984 decision to build a permanently occupied, international space station in low Earth orbit. As he follows the trail of the space station proposal through the labyrinth of White House policy review, McCurdy explains the evolution of the presidential budget review process, the breakup of the cabinet system, the proliferation of subcabinets and Executive Office interagency, the involvement of White House staff in framing issues for presidential review, and the role of bureaucracy in advancing administration legislation on Capitol Hill. Comparing the space station decision to earlier decisions to go to the moon and to build the space shuttle, McCurdy shows how public officials responsible for long-term science and technology policy maneuvered in a political system that demanded short-term flexibility.
Download or read book SPACEFARING NATION written by Martin Collins and published by Smithsonian Books (DC). This book was released on 1991-02-17 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eight essays from a spring 1987 conference at the Smithsonian Institute survey political and technical aspects of the US space program, suggesting that it has been shaped by institutional dynamics more than by technological advances. No index. Acidic paper, despite a claim to the contrary. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1987 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of Biological Membranes written by Patricia Bassereau and published by Springer. This book was released on 2018-12-30 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book mainly focuses on key aspects of biomembranes that have emerged over the past 15 years. It covers static and dynamic descriptions, as well as modeling for membrane organization and shape at the local and global (at the cell level) scale. It also discusses several new developments in non-equilibrium aspects that have not yet been covered elsewhere. Biological membranes are the seat of interactions between cells and the rest of the world, and internally, they are at the core of complex dynamic reorganizations and chemical reactions. Despite the long tradition of membrane research in biophysics, the physics of cell membranes as well as of biomimetic or synthetic membranes is a rapidly developing field. Though successful books have already been published on this topic over the past decades, none include the most recent advances. Additionally, in this domain, the traditional distinction between biological and physical approaches tends to blur. This book gathers the most recent advances in this area, and will benefit biologists and physicists alike.
Download or read book Exercise Endocrinology written by K. Fotherby and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-07-22 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: No detailed description available for "Exercise Endocrinology".
Download or read book Vision 21 Space Travel for the Next Millennium written by and published by . This book was released on 1991 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Station Systems A Bibliography with Indexes supplement 3 written by and published by . This book was released on 1987 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Large Space Structures Dynamics and Control written by S.N. Atluri and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph is intended to provide a snapshot of the status and opportunities for advan cement in the technologies of dynamics and control oflarge flexible spacecraft structures. It is a reflection ofthe serious dialog and assessments going on all over the world,across a wide variety of scientific and technical disciplines, as we contemplate the next major milestone in mankind's romance with space: the transition from exploration and experimentation to commercial and defense exploitation. This exploitation is already in full swing in the space communications area. Both military and civilian objectives are being pursued with increasingly more sophisticated systems such as large antenna reflectors with active shape control. Both the NATO and Warsaw pact alliances are pursuing permanent space stations in orbit: large structural systems whose development calls for in-situ fabrication and/or assembly and whose operation will demand innovations in controls technology. The last ten years have witnessed a fairly brisk research activity in the dynamics and control oflarge space structures in orderto establish a technology base forthe development of advanced spacecraft systems envisioned for the future. They have spanned a wide spectrum of activity from fundamental methods development to systems concept studies and laboratory experimentation and demonstrations. Some flight experiments have also been conducted for various purposes such as the characterization of the space enviroment, durability of materials and devices in that environment, assembly and repair operations, and the dynamic behavior of flexible structures. It is this last area that has prompted this monogram.
Download or read book Orthopedic Biomaterials written by Bingyun Li and published by Springer. This book was released on 2018-03-22 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest advances, applications, and challenges in orthopedic biomaterials. Topics covered include materials for orthopedic applications, including nanomaterials, biomimetic materials, calcium phosphates, polymers, biodegradable metals, bone grafts/implants, and biomaterial-mediated drug delivery. Absorbable orthopedic biomaterials and challenges related to orthopedic biomaterials are covered in detail. This is an ideal book for graduate and undergraduate students, researchers, and professionals working with orthopedic biomaterials and tissue engineering. This book also: Describes biodegradable metals for orthopedic applications, such as Zn-based medical implants Thoroughly covers various materials for orthopedic applications, including absorbable orthopedic biomaterials with a focus on polymers Details the state-of-the-art research on orthopedic nanomaterials and nanotechnology
Download or read book Graphene Science Handbook written by Mahmood Aliofkhazraei and published by CRC Press. This book was released on 2016-04-27 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: An In-Depth Look at the Outstanding Properties of GrapheneThe Graphene Science Handbook is a six-volume set that describes graphene's special structural, electrical, and chemical properties. The book considers how these properties can be used in different applications (including the development of batteries, fuel cells, photovoltaic cells, and supe
