Relevant bibliographies by topics / Helium tank

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Helium tank'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Helium tank"

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Popov, O. M., F. V. Ustenko, V. G. Tyles, and N. V. Markelova. "Improved 500-liter transport tank for liquid helium." Chemical and Petroleum Engineering 28, no. 9 (September 1992): 551–54. http://dx.doi.org/10.1007/bf01150577.

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Park, Youn Mi, Seh Wan In, and Sang Kwon Jeong. "The Size Optimization of the Liquid Helium Pressurant Tank for Liquid Propellant Rocket." Key Engineering Materials 277-279 (January 2005): 776–82. http://dx.doi.org/10.4028/www.scientific.net/kem.277-279.776.

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An efficient and reliable pressurization system for an oxidizer and fuel of a liquid propellant rocket is critical for a successful launch. A liquid helium pressurization system employing a heater can reduce its mass, and be made simpler and more reliable than conventional pressurization systems. The key issue to minimize the total mass of the system is the optimization of the size of the liquid helium tank. In this paper, we describe a method to determine the optimal size of a liquid helium tank, and present one set of results under a given set of requirements. In this pressurization system, the heater design is represented by the heater efficiency. To estimate the heater efficiency, the convection heat transfer coefficient should be known beforehand. The guideline how to estimate this convection heat transfer coefficient based on the preliminary experimental data is also presented in this paper.
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Fujiyoshi, Yoshinori. "High-Resolution Cryo-Electron Microscopy of Biological Macromolecules." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 1 (August 12, 1990): 126–27. http://dx.doi.org/10.1017/s0424820100179385.

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The resolution of direct images of biological macromolecules is normally restricted to far less than 0.3 nm. This is not due instrumental resolution, but irradiation damage. The damage to biological macromolecules may expect to be reduced when they are cooled to a very low temperature. We started to develop a new cryo-stage for a high resolution electron microscopy in 1983, and successfully constructed a superfluid helium stage for a 400 kV microscope by 1986, whereby chlorinated copper-phthalocyanine could be photographed to a resolution of 0.26 nm at a stage temperature of 1.5 K. We are continuing to develop the cryo-microscope and have developed a cryo-microscope equipped with a superfluid helium stage and new cryo-transfer device.The New cryo-microscope achieves not only improved resolution but also increased operational ease. The construction of the new super-fluid helium stage is shown in Fig. 1, where the cross sectional structure is shown parallel to an electron beam path. The capacities of LN2 tank, LHe tank and the pot are 1400 ml, 1200 ml and 3 ml, respectively. Their surfaces are placed with gold to minimize thermal radiation. Consumption rates of liquid nitrogen and liquid helium are 170 ml/hour and 140 ml/hour, respectively. The working time of this stage is more than 7 hours starting from full LN2 and LHe tanks. Instrumental resolution of our cryo-stage cooled to 4.2 K was confirmed to be 0.20 nm by an optical diffraction pattern from the image of a chlorinated copper-phthalocyanine crystal. The image and the optical diffraction pattern are shown in Fig. 2 a, b, respectively.
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Sudadiyo, Sri, and Geni Rina Sunaryo. "THERMODYNAMICS ANALYSES ON REGENERATIVE STEAM CYCLE WITH TWO TANKS FOR HTGR-10 CONCEPT." GANENDRA Majalah IPTEK Nuklir 20, no. 2 (September 15, 2017): 73. http://dx.doi.org/10.17146/gnd.2017.20.2.3302.

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THERMODYNAMICS ANALYSES ON REGENERATIVE STEAM CYCLE WITH TWO TANKS FOR HTGR-10 CONCEPT. In this work, steam cycle from a nuclear power plant is explored in order to increase electric power efficiency and output. A thermal source in the form of a HTGR-10 concept is considered. The power conversion unit of HTGR-10 consists of steam generators, turbines, condensers, pumps , and connecting pipes. Helium is used as the core coolant and the working fluid for power conversion unit is water/steam. The proposed thermodynamic process modification has been evaluated for regenerative steam power cycle of this reactor. The scope of study covered regenerative steam cycle with two tanks including feed water tank and intermediate feed water tank. The evaluation analyzes the effect of pressure, efficiencies of turbine and pumps, and tanks against thermal efficiency. The Cycle-Tempo software is used to simulate and optimize those effects on steam cycle based on HTGR-10. The results indicate improvements of as much as 2.65 % in thermal efficiency and 0.271 MWe in electric power.
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Wang, Lei, Shixuan Ye, Yuan Ma, Jiaojiao Wang, and Yanzhong Li. "CFD investigation on helium pressurization behaviors in liquid hydrogen tank." International Journal of Hydrogen Energy 42, no. 52 (December 2017): 30792–803. http://dx.doi.org/10.1016/j.ijhydene.2017.10.145.

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Kwon, Ohsung, Byunghun Kim, Gyoungsub Kil, Inhyun Cho, and Youngsung Ko. "Modeling the Prediction of Helium Mass Requirement for Propellant Tank Pressurization." Journal of Spacecraft and Rockets 49, no. 6 (November 2012): 1150–58. http://dx.doi.org/10.2514/1.a32073.

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Zhang, Caigong, Changjun Li, Wenlong Jia, and Yu Pang. "Thermodynamic study on thermal insulation schemes for liquid helium storage tank." Applied Thermal Engineering 195 (August 2021): 117185. http://dx.doi.org/10.1016/j.applthermaleng.2021.117185.

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Zhu, Ming, Gao Feng Xie, and Rong Shun Wang. "Experimental Investigation of the Influence of the Gas Type on the Heat Transfer in a High-Vacuum-Multilayer-Insulation Cryogenic Tank After Sudden, Catastrophic Loss of Insulating Vacuum." Advanced Materials Research 354-355 (October 2011): 294–303. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.294.

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One of the worst accidents that may occur in a high-vacuum-multilayer-insulation (HVMLI) cryogenic tank is a sudden, catastrophic loss of insulation vacuum (SCLIV). it is obvious that the different gas leaking into the insulation jacket have some influence on the heat transfer process. However, this problem has not been studied systematically so far. In this paper, a test rig was built up and experiments were conducted on a SCLIV cryogenic tank by using the nitrogen, helium, oxygen, carbon dioxide and air as the leaking medium, respectively. Some important phenomena and heat transfer characteristics in a vacuum-lost HVMLI cryogenic tank have been obtained. The effects of the insulation layer numbers and the type of gases on venting rate and heat flux into the cryogenic liquid have been measured, analyzed and discussed. It indicates that the heat transfer performance of the HVMLI cryogenic tank after SCLIV is strong related to the type of gases leaking into the insulation jacket.
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PUTCHA, CHANDRA S., PRINCE KALIA, FRANK PIZZANO, GORDON HOSKINS, COY NEWTON, and KUNAL J. KAMDAR. "A CASE STUDY ON FMEA APPLICATIONS TO SYSTEM RELIABILITY STUDIES." International Journal of Reliability, Quality and Safety Engineering 15, no. 02 (April 2008): 159–66. http://dx.doi.org/10.1142/s0218539308003003.

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Failure Mode and Effect Analysis (FMEA) has been used quite extensively in aerospace industry for several years to establish hardware criticality. Determination of software reliability is equally important. There are several methods for determining software reliability. One methods for performing software reliability is the software FMEA. This paper discusses the application of principles to FMEA. A typical Tank pressurant is considered as an illustrative example. The tank pressurant system consists of three sets of solenoid valves (each set consists of a pair of valves), three pressure transducers, a vent valve, a heat exchanger and helium cold pressure bottles. Each set of solenoid valves consist of two solenoid valves connected in series. For the system to function properly, certain conditions have to be met. These are discussed in detail later in this paper. Based on the information provided from NASA, it is concluded that FMEA has to be capable of determining the software failure modes, effects and criticality as well as the hardware failure modes effects and criticality which includes the pressure transducers, solenoid valves, vent valve, heat exchanger and helium cold pressure bottles. The paper will discuss both the hardware and software FMEA application in detail.
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Chorowski, M., M. Grabowski, A. Jędrusyna, and J. Wach. "Modelling and Experimental Verification of Pressure Wave Following Gaseous Helium Storage Tank Rupture." Physics Procedia 67 (2015): 1083–88. http://dx.doi.org/10.1016/j.phpro.2015.06.204.

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Dissertations / Theses on the topic "Helium tank"

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Rosén, Elin, Lina Melin, and Dzesika Taube. "Låt äventyret börja! : En komparativ studie av Musse & Helium, elevtolkningar och lärarhandledning." Thesis, Linnéuniversitetet, Institutionen för svenska språket (SV), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-85661.

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Studiens syfte är att urskilja teman i böckerna om Musse och Helium genom en litteraturanalys, samt vilka teman som framkommer genom elevers (åk 1–2) tolkning av ett utdrag ur böckerna. Studien fokuserar även på befintliga och framtolkade teman från böckernas tillhörande lärarhandledning. Studiens tre resultat jämförs i en komparativ analys. De teman som tolkades fram i litteraturanalysen var; det goda och det onda, dörren till ett magiskt land, att ta lärdom av livets utmaningar, samt det kompetenta barnet. De teman som eleverna tolkade fram i textsamtalen var; det goda och det onda, den hemliga fantasivärlden och allt hänger på dom!. I analysen av lärarhandledningen tolkades en mängd olika teman fram, några var redan vedertagna i instruktionen, vår tolkning av lärarhandledningen landade i att det går att urskilja flera teman beroende på vilken avsikt som finns. I den komparativa analysen så synliggjordes likheter och skillnader mellan de olika teman som tolkats fram i samtligt resultat. Analysen synliggjorde också möjligheter och svårigheter mellan olika arbetssätt. Vår huvudsakliga slutsats är att vi ser goda möjligheter med att arbeta med detta material med tillhörande lärarhandledning i undervisning. Materialet bör däremot inte ses som fullständigt, då vi ser fler möjligheter att använda det skönlitterära verket än vad lärarhandledningen innefattar.
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Helm-Rommel, Ingrid [Verfasser], and W. [Akademischer Betreuer] Schirmer. "Das Theater am Burgberg von Pergamon / Ingrid Helm-Rommel. Betreuer: W. Schirmer." Karlsruhe : KIT-Bibliothek, 1999. http://d-nb.info/1014326702/34.

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Rosenlund, Joacim. "An Interactive Research Approach to the Triple Helix Model in Environmental Science." Licentiate thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-38858.

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Increased interaction between scientists and the social environment is considered to be one of the characteristics of modern science. This interaction can occur through collaboration between different sectors in society. In connection to this, the Triple Helix model claims that interaction between university, industry and public sectors, is key to modern innovation development. So far, cross-sector interaction between actors in environmental science has been scarcely studied in a scientific manner. Most studies carried out in the area have disregarded the actual practice of such collaborations and what happens in projects where these sectors interact. As this has become a common way to solve environmental problems, it is of considerable importance to gain more knowledge about this process. The objective of this research was to study and explain cross-sector collaboration. Using the interactive research method, characterised by joint learning and interaction with the participants, this was explored through two case studies. The method was well suited for studying ongoing interactions between the university, industry and public sectors. The first case was an international collaboration between representatives of the Triple Helix sectors. Here, olive-mill wastewater in Greece was the focus. The Triple Helix framework was used both on the intended analytical level and at a management level closer to the actor level of the participants. The second case was a three-year environmental research project in the Kalmar region where strong university-industry collaboration was carried out in order to find wastewater treatment solutions in the wood industry. This collaboration was extended to include more actors in the region during the process. The actual practice of these cases showed the importance of a dialogue between participants. Triple Helix can be used as an initial framework for such a dialogue through which the model is redefined by input from all sectors.
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Books on the topic "Helium tank"

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Up goes Mr. Downs. New York: Parents Magazine Press, 1993.

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Sepowski, Stephen J., ed. The Ultimate Hint Book. Old Saybrook, CT: The Ultimate Game Club Ltd., 1991.

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Inc, Game Counselor. Game Counselor's Answer Book for Nintendo Players. Redmond, USA: Microsoft Pr, 1991.

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Final report on sloshing dynamics on rotating helium dewar tank. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Final report on sloshing dynamics on rotating helium dewar tank. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Smath, Jerry. UP GOES MR DOWNS. Random House, Inc., 1987.

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Development of a flexible seal for a 60 psi cryogenic pressure box. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Varol, Ozan O. The Retreat. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190626013.003.0019.

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For several reasons, prolonged participation in politics can endanger both the military as an institution and the leaders at the helm, prompting an abdication of political power. Military muscle doesn’t equal political acuity. Governance often turns out to be a humbling experience for military leaders ill-equipped to perform the task. Even military officers initially determined to establish a dictatorship may lose their appetite for governance as they begin to appreciate the human and political capital required to run a government, let alone establish an enduring dictatorship. The intramural squabbles within the junta can snowball in intensity over time and cause the leadership to implode.
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Inc, Game Counsellor, ed. The Game Counsellor's answer book for Nintendo Game players: Hundredsof questions -and answers - about more than 250 popular Nintendo Games. Redmond, Washington: Microsoft Press, 1991.

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Book chapters on the topic "Helium tank"

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Park, Youn Mi, Seh Wan In, and Sang Kwon Jeong. "The Size Optimization of the Liquid Helium Pressurant Tank for Liquid Propellant Rocket." In Key Engineering Materials, 776–82. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-958-x.776.

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"Failure of a Stainless Steel Tank Used for Storage of Heavy Water/Helium." In Handbook of Case Histories in Failure Analysis, 253–55. ASM International, 1993. http://dx.doi.org/10.31399/asm.fach.v02.c9001349.

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"Failure of Welded Helium Tanks." In Handbook of Case Histories in Failure Analysis, 249–52. ASM International, 1993. http://dx.doi.org/10.31399/asm.fach.v02.c9001348.

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Arnaut, Dino. "From a Traditional to an Entrepreneurial University." In Handbook of Research on Enhancing Innovation in Higher Education Institutions, 142–65. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2708-5.ch007.

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The transformation of a traditional research university to an entrepreneurial university is increasing because of the reduction in university funding from government sources and the constant emergence of a competitive market for research and education. A new approach has emerged, focusing on promoting the spillover of knowledge through university entrepreneurship. The creation of an entrepreneurial culture and the movement towards a Triple Helix model is a complex task that requires the efforts of many dedicated individuals. Universities as centres for knowledge creation and diffusion can be leveraged to generate future economic growth. For small transition countries, it is important that universities operate under policies that encourage entrepreneurship and innovation. The education of young people about entrepreneurship represents a highly valuable preparation for constant changes in the labour market. Entrepreneurial education is crucial to help young people develop entrepreneurial skills, attributes, and behaviour, as well as to embrace entrepreneurship as a career option.
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Arnaut, Dino. "From a Traditional to an Entrepreneurial University." In Research Anthology on Business and Technical Education in the Information Era, 607–30. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5345-9.ch034.

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The transformation of a traditional research university to an entrepreneurial university is increasing because of the reduction in university funding from government sources and the constant emergence of a competitive market for research and education. A new approach has emerged, focusing on promoting the spillover of knowledge through university entrepreneurship. The creation of an entrepreneurial culture and the movement towards a Triple Helix model is a complex task that requires the efforts of many dedicated individuals. Universities as centres for knowledge creation and diffusion can be leveraged to generate future economic growth. For small transition countries, it is important that universities operate under policies that encourage entrepreneurship and innovation. The education of young people about entrepreneurship represents a highly valuable preparation for constant changes in the labour market. Entrepreneurial education is crucial to help young people develop entrepreneurial skills, attributes, and behaviour, as well as to embrace entrepreneurship as a career option.
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"really what was at issue, so much as the means by which the inevitable outcome would be accomplished, and it is precisely those means which are problematized by the riddle structure. As usual, the answer is provided retrospectively and within the dramatic frame, but in this case the solution involves the introduc­ tion of new ‘facts’ of which the reader has hitherto been quite unaware. That night, in their prison cell, Theagenes and Charikleia talk over the day’s remarkable events. Charikleia suddenly remem­ bers a dream vision of her now dead mentor Kalasiris that had visited her the previous night and delivered this prophecy: If you wear pantarbe fear-all, fear not the power of flame Miracles may come to pass; for Fate ’tis easy game. (8.11.2) The solution to the riddle is itself a riddle, which Charikleia elucidates for her sceptical beloved: thinking she was about to die, she had secreted about herself the recognition tokens left her by her mother, including a ring set with the jewel called pantarbe and engraved with mystic characters. This, she surmises, protected her from the fire (8.11.7-8). Heliodoros’ manipulation of his narrative is obvious. Any ‘honest’ writer would have narrated this self-evidently important dream in its proper chronological place. The postponement is half­ heartedly explained within the dramatic frame by the suggestion that Charikleia simply forgot about it, but this is only for form’s sake.8 Heliodoros is deliberately withholding information, to induce puzzlement and speculation, to encourage the reader to take, in Umberto Eco’s notorious phrase, ‘inferential walks’. In comparison with the other riddles we have discussed, this one may seem adversarial rather than collaborative. Rather than slowly releasing material which will guide the reader safely to the correct solution, Heliodoros’ aim appears to be to keep us in the dark until such time as it suits him to tell us something we could not have otherwise known. But, although the author is playing more roughly here, he is still observing the rules: the clues are there, though probably their significance is realized only in retrospect. As Charikleia goes to face trial, intending to denounce herself and find release from the torment of her existence, Helio­ doros duly records that she wore her recognition tokens ‘as a kind of burial shroud, fastened around her waist beneath her clothes’ (8.9.8). And this reference to the tokens takes us back, across half." In Greek Literature in the Roman Period and in Late Antiquity, 324. Routledge, 2014. http://dx.doi.org/10.4324/9780203616895-39.

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"freezing out, adsorption and absorption. After concentrating, separation is achieved by classical methods such as gas chranatography (GC) or high pressure liquid chranatography (HPLC). Identification is based mainly on mass spectrometry, infra-red spectrometry and chrcmatographic data. 3. RESULTS The primary goal of these methods is to concentrate all volatile com­ pounds, mainly volatile organic compounds or VOCs, present. This mixture of VOCs, containing odorous ccmpcunds, next to a large majority of unodo-rous substance, then is analysed. This chemical analysis is based on the separation of these hundreds of compounds by gas chranatography, is hampe­ red by large amounts of water, which is always present in air, and which is also freezed out or adsorbed. The only way to escape more or less this difficulty is to use a rather apolar adsorbant, in casu Tenax GC or similar materials (e.g. Chranosorb 102) (5). A second limitation is the fact that no material will ever be capable of adsorbing all odorous com­ pounds completely, and permit to desorb then afterwards completely. For compounds with very low boiling point, e.g. hydrogen sulphide, strong ad-sorbants are necessary, while for odorants with high boiling point, e.g. skatol or the sesquiterpenes, thermal desorption is difficult with strong adsorbant s. So a compromise has to be accepted, or several complementa­ ry adsorbants have to be used. At this moment this compromise for concen­ trating all odorous substances is found in the adsorbant mentioned, kno­ wing that the most volatile compounds might escape partly. Many systems have been described and even carenercialised, but we use a home-built sy­ stem, which is schematically represented in figure 1 (6). On an outer side wall of the gas chromatograph (GC) an oven in which the Tenax-adsorp-tion-sampling tubes fit is constructed. Connections with pressurized he­ lium (transfer gas) is provided and their is a connection with a high tem­ perature resistant sixway valve, which replaces the normal GC-injector. During thermal desorption (position 1 in figure 1) the transfer gas, car­ rying desorbed volatiles, passes the sixway valve, a cold trap (stainless steel loop cold with liquid air) and enters the ambient air. The helium carrier gas is connected to the GC-column via the sixway valve. After the desorption stage which usually takes about 45 minutes, with a desorption oven temperature of 220°C for 30 minutes at least, the sixway valve is switched (position 2 in figure 1). At that moment transfer gas flows through the sixway valve directly into the ambient whereas the carrier gas passes the cold trap before entering the GC-column. The liquid air is removed from the cold trap and the latter is quickly heated by a high in­ tensity fload light. In this way condensed compounds are flash-evaporated and injected into the GC-system. Concentrating odorants by adsorption-desorption techniques produces a terribly complex mixture of VOCs, which is separated by gas chranato­ graphy. Fortunately this technique allows formidable separation power, but still then the result is not always sufficient far a clear-cut odour analysis. In figure 2 the GC-analysis is shown of an air sample in the neighbourhood of a rendering plant, showing a great number of VOCs; however almost all of them are hydrocarbons produced by cars and heating systems and sane other products, which do not contribute to the odour. Very small peaks of odorants are detected, which shows the difficult task of odour ana­ lysis with a general concentrating technique. Of course this analysis is far more relevant if emission gases are examined as is demonstrated in fi­ gure 3 (7). Part of these difficulties can be overcane if the odorants can." In Odour Prevention and Control of Organic Sludge and Livestock Farming, 169. CRC Press, 1986. http://dx.doi.org/10.1201/9781482286311-75.

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Conference papers on the topic "Helium tank"

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Collicott, S., R. Bayt, and S. Courtney. "Ullage bubble stability in the relativity experiment helium tank." In 30th Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-3026.

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Teissier, Alain, and Cecile Bass. "Liquid helium storage for Ariane 5 main stage oxygen tank pressurization." In 31st Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-2956.

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Krautheim, M. "One-g fluid experiments of the Gravity Probe-B helium tank." In 34th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-6.

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VALY, Y., and P. COQUET. "Wound helium pressurant tank development for 2nd stage of Ariane 4 launcher." In 26th Joint Propulsion Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1990. http://dx.doi.org/10.2514/6.1990-2347.

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Grayson, Gary, Alfredo Lopez, Frank Chandler, Leon Hastings, Ali Hedayat, and James Brethour. "CFD Modeling of Helium Pressurant Effects on Cryogenic Tank Pressure Rise Rates in Normal Gravity." In 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-5524.

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Khawand, George, Bob Loibl, Dan Nissen, and Michael Witt. "Design and qualification of a single tank for dual applications - Helium pressurant or xenon propellant." In 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2000. http://dx.doi.org/10.2514/6.2000-3890.

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Chen, Y., and S. Collicot. "Effects of wicking and spin on bubble position in the Gravity Probe-B helium tank geometry." In 40th AIAA Aerospace Sciences Meeting & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-1004.

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Lee, Sun-Kyung, Sang Yeop Han, Dong-Soon Shin, and R. Ray Taghavi. "Thermal-Fluidic Numerical Analysis for the Development of Heat Exchanger in the Propellant Tank Pressurization System of KSLV-II Upper Stage." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-03742.

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KSLV-II (Korea Space Launch Vehicle - II) launch vehicle is a three staged satellite launch vehicle using a liquid propellant propulsion system in all three stages. It will deliver 1,500 kg satellite to Sun Synchronous Orbit (SSO, 700 km, 98.2°) or 2,600 kg satellite to Low Earth Orbit (LEO, 300 km, 80.3°). Propellants for KSLV-II are kerosene as a fuel and liquid oxygen as an oxidizer for propelling. Those fuel and oxidizer are stored in on-board tanks separately. To run a liquid propellant rocket engine on ground or in flight, those propellants should be supplied to LRE’s using so-called Propellant Pressurizing Sub-system, which makes propellants be pressurized in tanks using pressurant. A pressurant for PPSS of KSLV-II is helium, which is stored in tanks located in an oxidizer tank. The stored He is under cryogenic condition (50 K) as gaseous state. Such He is heated and expanded through heat exchanger, which is using a combustion gas coming out from gas generator for turbo-pump as an energy source, to be used as pressurant. This paper contains the results of performance analysis and thermal-fluidic numerical analysis to develop the above-mentioned heat exchanger for KSLV-II upper stage (the 2nd stage). The technical requirements for such heat exchanger are as follows: pressurant mass flow rate for oxidizer tank - 0.127 kg/sec; and for fuel tank - 0.043 kg/sec. The outlet temperature of He from heat exchanger is 550±10 K.
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Tanaka, Yudai, and Tetsuaki Takeda. "Development of Prevention Method for Air Ingress During a Pipe Rupture Accident of the VHTR: Effectiveness on Localized Natural Convection." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66602.

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A primary pipe rupture accident is one of the design-basis accidents of a Very-High-Temperature Reactor (VHTR). When a primary pipe rupture accident occurs, air is expected to enter into the reactor pressure vessel from the breach and oxidize in-core graphite structures. Therefore, it is important to understand the mixing processes of different kinds of gases in the stable and unstable stratified fluid layers. In particular, it is also important to examine the influence of localized natural convection and molecular diffusion on the mixing process from a safety viewpoint. Therefore, in order to predict or analyze the air ingress phenomena during a pipe rupture accident, it is important to develop a method for the prevention of air ingress during an accident. We carried out experiments to obtain the mixing process of two-component gases and flow characteristics of localized natural convection. This study also investigated a control method for the natural circulation of air through the injection of helium gas. An experiment has been carried out to investigate a control method of natural circulation of air by injection of helium gas. The experimental apparatus consists of a reverse U-sharped vertical slot and a storage tank. One side-slot consists of the heated and cooled walls. The other side-slot consists of the two cooled walls. The dimensions of the vertical slots are 598 mm in height, 208 mm in depth, and 70 mm in width. Each two vertical slots were connected and were a reverse U-shaped passage. The dimensions of the connecting passage were 16 mm in height, 106 mm in depth, and 210 mm in length. The storage tank was connected to the lower part of the reverse U-shaped passage. The dimensions of the storage tank were 398 mm in length, 398 mm in depth, and 548 mm in width. The reverse U-shaped passage and the storage tank were separated by a partition plate. The wall and gas temperature were measured by a K-type thermocouple. Experimental results regarding mixing process of two component gases in vertical fluid layer were as follows. The heavy gas was transported to the slot by the molecular diffusion and natural convection. As time elapses, natural circulation of heavy gas suddenly occurs through the reverse U-shaped slot. As a result of experiments, the onset time of natural circulation is affected by not only molecular diffusion coefficient but also the strength of natural convection. When the helium gas is injected into the channel, it is possible to control the natural circulation of air. The onset time of the reproduction of the natural circulation can be varied by changing the injection rate of the helium gas.
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10

Mikellides, Pavlos G. "Numerical Simulations of the Pulsed Inductive Thruster." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39349.

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Numerical modeling of the Pulsed Inductive Thruster exercising the magnetohydrodynamic code, MACH2 aims to provide bilateral validation of the thruster’s measured performance and the code’s capability of capturing the pertinent physical processes. Computed impulse values demonstrate excellent correlation to the experimental data for a range of energy levels and helium propellant-mass values. The effects of the vacuum tank wall and mass-injection scheme were investigated to show trivial changes in the overall performance.
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Reports on the topic "Helium tank"

1

Tosten, M. H., and P. A. Kestin. Helium bubble distributions in reactor tank repair specimens. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/6978377.

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2

Tosten, M. H., and P. A. Kestin. Helium bubble distributions in reactor tank repair specimens. Part 1. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/10104371.

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3

Rucinski, Russ. D0 Silicon Upgrade: Gas Helium Storage Tank Pressure Vessel Engineering Note. Office of Scientific and Technical Information (OSTI), November 1996. http://dx.doi.org/10.2172/1033270.

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