Formulation and Comparative Study of Rheological Properties of Loaded and Unloaded Ethanol-Based Gel Propellants

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dc.contributor.authorVara Siva Jyoti, Botchuko
dc.contributor.authorBaek, Seung-Wookko
dc.date.accessioned2014-11-12T07:17:09Z-
dc.date.available2014-11-12T07:17:09Z-
dc.date.created2014-11-11-
dc.date.created2014-11-11-
dc.date.created2014-11-11-
dc.date.issued2015-04-
dc.identifier.citationJOURNAL OF ENERGETIC MATERIALS, v.33, no.2, pp.125 - 139-
dc.identifier.issn0737-0652-
dc.identifier.urihttp://hdl.handle.net/10203/191072-
dc.description.abstractThe current trend in the area of highly energetic storable liquid rocket propellant research is to develop environmentally friendly gelled/metallized systems and to explore the feasibility of their application in rocket engines. The idea stems from the fact that the conversion of a conventional liquid propellant to a gelled state and its subsequent metallization has the potential to significantly enhance the performance and density-specific impulse. The gelation of liquid fuels could be induced at a critical gellant concentration of as low as 8wt% for the pure ethanol case and as low as 4 and 6wt% for metallized ethanol depending on the metal type. Furthermore, the gel formed should be thixotropic. Metallized gels using 20wt% Al and B metal powders could also be formulated. These metallized (Al and B) ethanol gel systems showed a reduction in the critical gellant concentration depending on the degree of metallization. The rheological properties of metallized and nonmetallized ethanol gels using methyl cellulose (MC) as a gelling agent at different ambient temperatures (283.15, 293.15, 303.15, 313.15, and 323.15K) were experimentally investigated in this study. The gel fuels were rheologically characterized using a rheometer at shear rates ranging from 1 to 12s(-1) and 1 to 1,000s(-1). Metallized and nonmetallized ethanol gels were found to be thixotropic in nature. The apparent viscosity and yield stress (for shear rate range 1 to 12s(-1)) of gels were observed to significantly decrease at higher ambient temperatures and as the gellant and metal particle concentrations decreased. The thixotropic behavior was found to be a strong function of the Al and B metal particle concentration for all test temperatures at shear rate ranges from 1 to 12s(-1) and 1 to 1,000s(-1). It was also a function of the MC concentration at a shear rate range of 1 to 1,000s(-1).-
dc.languageEnglish-
dc.publisherTAYLOR & FRANCIS INC-
dc.titleFormulation and Comparative Study of Rheological Properties of Loaded and Unloaded Ethanol-Based Gel Propellants-
dc.typeArticle-
dc.identifier.wosid000342844700005-
dc.identifier.scopusid2-s2.0-84911968458-
dc.type.rimsART-
dc.citation.volume33-
dc.citation.issue2-
dc.citation.beginningpage125-
dc.citation.endingpage139-
dc.citation.publicationnameJOURNAL OF ENERGETIC MATERIALS-
dc.identifier.doi10.1080/07370652.2014.939311-
dc.contributor.localauthorBaek, Seung-Wook-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorpropellant-
dc.subject.keywordAuthorthixotropic-
dc.subject.keywordAuthorgel-
dc.subject.keywordAuthorshear thinning-
dc.subject.keywordAuthorrheology-
dc.subject.keywordAuthorpropellant-
dc.subject.keywordAuthorthixotropic-
dc.subject.keywordAuthorgel-
dc.subject.keywordAuthorshear thinning-
dc.subject.keywordAuthorrheology-
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AE-Journal Papers(저널논문)
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