362 research outputs found
Upper Stage Tank Thermodynamic Modeling Using SINDA/FLUINT
Modeling to predict the condition of cryogenic propellants in an upper stage of a launch vehicle is necessary for mission planning and successful execution. Traditionally, this effort was performed using custom, in-house proprietary codes, limiting accessibility and application. Phenomena responsible for influencing the thermodynamic state of the propellant have been characterized as distinct events whose sequence defines a mission. These events include thermal stratification, passive thermal control roll (rotation), slosh, and engine firing. This paper demonstrates the use of an off the shelf, commercially available, thermal/fluid-network code to predict the thermodynamic state of propellant during the coast phase between engine firings, i.e. the first three of the above identified events. Results of this effort will also be presented
Safety assessment of the substance (butadiene, styrene, methyl methacrylate, butyl acrylate) copolymer cross-linked with divinylbenzene or 1,3-butanediol dimethacrylate for use in food contact materials
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Safety assessment of the process âEREMA Recycling (MPR, Basic and Advanced technologies)â, used to recycle post-consumer PET into food contact materials
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Safety assessment of the mixture of methyl-branched and linear C14âC18 alkanamides, derived from fatty acids, for use in food contact materials
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Safety assessment of the substance phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethylpropyl)phenyl triesters for use in food contact materials
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Safety assessment of the process âMĂ€rkische Faserâ, based on NGR technology, used to recycle post-consumer PET into food contact materials
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Safety assessment of the process âPEGRA-Vâ, based on Starlinger IV+Âź technology, used to recycle post-consumer PET into food contact materials
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Safety assessment of the process âAlimpetâ, based on EREMA MPR technology, used to recycle post-consumer PET into food contact materials
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Safety assessment of the substance dimethyl carbonate for use in food contact materials
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Safety assessment of the process âPlastienvaseâ, based on EREMA Basic technology, used to recycle post-consumer PET into food contact materials
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