Experimental And Theoretical Investigations Of The Physical Processes Related To The Retention Capability Of A Double Screen Element Against Liquid Hydrogen In Earth S Gravity And In Microgravity With Respect To The Applied Stimuli
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Experimental And Theoretical Investigations Of The Physical Processes Related To The Retention Capability Of A Double Screen Element Against Liquid Hydrogen In Earth S Gravity And In Microgravity With Respect To The Applied Stimuli
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Author : André Pingel
language : en
Publisher: Cuvillier Verlag
Release Date : 2022-08-04
Experimental And Theoretical Investigations Of The Physical Processes Related To The Retention Capability Of A Double Screen Element Against Liquid Hydrogen In Earth S Gravity And In Microgravity With Respect To The Applied Stimuli written by André Pingel and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-08-04 with Technology & Engineering categories.
Metal screens are commonly used as components for fluid handling in spacecraft and rocket tank designs. In most cases, the screens perform a passive separation of the propellant phases. The separation of the liquid from the gaseous propellant phase, is a special challenge. Liquid-gas phase separation means that the gaseous phase is allowed to enter a phase separation device while the liquid phase is blocked. The technical application of this process is the depressurization in a propellant tank. A certain amount of the gaseous propellant phase is vented from the tank through the gas port. The liquid propellant phase remains in the tank in order to be stored for the engine. However, if the tank causes a liquid movement during the depressurization, a part of the liquid can potentially enter the gas port. In order to prevent the unwanted liquid outflow, a separation of the liquid from the gas is necessary. This is possible with the aid of a double screen element and has already been performed for storable liquids in Earth’s gravity and microgravity as well as for cryogenic liquids in Earth’s gravity. At the current state of the art, the separation of the liquid from the gaseous phase of the cryogenic propellant hydrogen using a double screen element has not been performed in microgravity. However, with regard to a possible application, it is mandatory to investigate the function of the double screen element for the real propellant under relevant environmental conditions. In this work, a cryogenic test facility has been developed and operated successfully under Earth’s gravity and microgravity conditions using the drop tower at the University of Bremen. Hereby, the original, cryogenic propellant phases: liquid and gaseous hydrogen, have been used. The experiments show the appearance of the physical processes which are related to the retention capability of a double screen element against liquid hydrogen. Furthermore, these physical processes can obviously be influenced by an unknown boundary condition at the screens: the screen saturation. This unknown boundary condition in turn can obviously be influenced by a certain stimulus which causes a special, fluid mechanical process. A simplified mathematical and two numerical models have been developed which combine the observed, physical processes in the experiments. Two fitting parameters are introduced which influence the flow through screen pressure loss of the liquid and the gaseous hydrogen phase. After the fitting to experimental data, the two fitting parameters have been interpreted with respect to a possible screen saturation. The results lead to a prediction of the unknown boundary condition and indicate that a partial saturation of the screens with liquid could be present in each considered experiment. This can possibly lead to a major influence of the overall resistance of the double screen element against liquid hydrogen.
Experimental And Theoretical Investigations Of The Physical Processes Related To The Retention Capability Of A Double Screen Element Against Liquid Hydrogen In Earth S Gravity And In Microgravity With Respect To The Applied Stimuli
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Author : André Pingel
language : en
Publisher:
Release Date : 2022
Experimental And Theoretical Investigations Of The Physical Processes Related To The Retention Capability Of A Double Screen Element Against Liquid Hydrogen In Earth S Gravity And In Microgravity With Respect To The Applied Stimuli written by André Pingel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Bulletin Of The Atomic Scientists
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Author :
language : en
Publisher:
Release Date : 1970-06
Bulletin Of The Atomic Scientists written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970-06 with categories.
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Bulletin Of The Atomic Scientists
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Author :
language : en
Publisher:
Release Date : 1961-05
Bulletin Of The Atomic Scientists written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961-05 with categories.
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Bulletin Of The Atomic Scientists
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Author :
language : en
Publisher:
Release Date : 1970-06
Bulletin Of The Atomic Scientists written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970-06 with categories.
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Safe Passage
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Author : Institute of Medicine
language : en
Publisher: National Academies Press
Release Date : 2001-11-20
Safe Passage written by Institute of Medicine and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-11-20 with Science categories.
Safe Passage: Astronaut Care for Exploration Missions sets forth a vision for space medicine as it applies to deep space voyage. As space missions increase in duration from months to years and extend well beyond Earth's orbit, so will the attendant risks of working in these extreme and isolated environmental conditions. Hazards to astronaut health range from greater radiation exposure and loss of bone and muscle density to intensified psychological stress from living with others in a confined space. Going beyond the body of biomedical research, the report examines existing space medicine clinical and behavioral research and health care data and the policies attendant to them. It describes why not enough is known today about the dangers of prolonged travel to enable humans to venture into deep space in a safe and sane manner. The report makes a number of recommendations concerning NASA's structure for clinical and behavioral research, on the need for a comprehensive astronaut health care system and on an approach to communicating health and safety risks to astronauts, their families, and the public.
Human Health And Performance Risks Of Space Exploration Missions
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Author : Jancy C. McPhee
language : en
Publisher: U. S. National Aeronautics & Space Administration
Release Date : 2009
Human Health And Performance Risks Of Space Exploration Missions written by Jancy C. McPhee and has been published by U. S. National Aeronautics & Space Administration this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Biography & Autobiography categories.
Extractive Metallurgy Of Niobium
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Author : A.K. Suri
language : en
Publisher: Routledge
Release Date : 2017-11-13
Extractive Metallurgy Of Niobium written by A.K. Suri and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-13 with Science categories.
The growth and development witnessed today in modern science, engineering, and technology owes a heavy debt to the rare, refractory, and reactive metals group, of which niobium is a member. Extractive Metallurgy of Niobium presents a vivid account of the metal through its comprehensive discussions of properties and applications, resources and resource processing, chemical processing and compound preparation, metal extraction, and refining and consolidation. Typical flow sheets adopted in some leading niobium-producing countries for the beneficiation of various niobium sources are presented, and various chemical processes for producing pure forms of niobium intermediates such as chloride, fluoride, and oxide are discussed. The book also explains how to liberate the metal from its intermediates and describes the physico-chemical principles involved. It is an excellent reference for chemical metallurgists, hydrometallurgists, extraction and process metallurgists, and minerals processors. It is also valuable to a wide variety of scientists, engineers, technologists, and students interested in the topic.
Modern Physics
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Author : Canio Noce
language : en
Publisher:
Release Date : 2020-09-02
Modern Physics written by Canio Noce and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-09-02 with categories.
Intended for science and engineering students with a background in introductory physics and calculus, this textbook creates a bridge between classical and modern physics, filling the gap between descriptive elementary texts and formal graduate textbooks. The book presents the main topics and concepts of special relativity and quantum mechanics, starting from the basic aspects of classical physics and analysing these topics within a modern physics frame. The classical experiments that gave rise to modern physics are also critically discussed, and special emphasis is devoted to solid state physics and its relationship with modern physics. Key Features Creates a bridge between classical and modern physics, filling the gap between elementary and formal/theoretical texts Takes a critical approach, arguing that the difficulty with describing modern physics phenomena can be transformed into cultural challenges which require new forms of reasoning Discusses solid-state physics and its relationship with modern physics Includes details of classic experiments, including computer‐assisted experiments that can help demonstrate modern physics principles Includes practice exercises and applets that simulate key concepts
Oil And Gas Production Handbook An Introduction To Oil And Gas Production
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Author : Havard Devold
language : en
Publisher: Lulu.com
Release Date : 2013
Oil And Gas Production Handbook An Introduction To Oil And Gas Production written by Havard Devold and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Gas fields categories.