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  • 1
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    The Kerala Khondalite Belt (KKB) of Southern India: An ensialic mobile belt (1988)
    In:  CASI
    Details
    Publikationsdatum: 2013-08-29
    Beschreibung: The Proterozoic Kerala Khondalite belt of the Southern Indian Shield is described, a belt dominated by granulite grade (750 C, 5 to 6 kbar) supracrustal rocks whose protoliths included arkoses and shales with cratonic provenances. Rare earth elements and other geochemical signatures suggest a granitic source for these metasediments, possibly the spatially associated charnockite massifs. The presence of intercalated mafic gneisses, interpreted as basalts, implies a cratonic rift basin rather than a foreland basin setting. It was argued that the Kerala, as well as other early Proterozoic mobile belts formed during abortive continental rifting without major additions of new crust.
    Schlagwort(e): GEOPHYSICS
    Materialart: Lunar and Planetary Inst., Workshop on the Growth of Continental Crust; p 45-47
    Format: text
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  • 2
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    Structural analysis for preliminary design of High Speed Civil Transport (HSCT) (1992)
    In:  CASI
    Details
    Publikationsdatum: 2013-08-29
    Beschreibung: In the preliminary design environment, there is a need for quick evaluation of configuration and material concepts. The simplified beam representations used in the subsonic, high aspect ratio wing platform are not applicable for low aspect ratio configurations typical of supersonic transports. There is a requirement to develop methods for efficient generation of structural arrangement and finite element representation to support multidisciplinary analysis and optimization. In addition, empirical data bases required to validate prediction methods need to be improved for high speed civil transport (HSCT) type configurations.
    Schlagwort(e): STRUCTURAL MECHANICS
    Materialart: NASA. Langley Research Center, Computational Structures Technology for Airframes and Propulsion Systems; p 321-334
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  • 3
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    Petrology and tectonic development of supracrustal sequence of Kerala Khondalite Belt, Southern India (1988)
    In:  CASI
    Details
    Publikationsdatum: 2013-08-31
    Beschreibung: The granulite terrain of southern India, of which the Kerala Khondalite belt (KKB) is a part, is unique in exposing crustal sections with arrested charnockite growth in different stages of transformation and in varied lithological association. The KKB with rocks of surficial origin and incipient charnockite development, poses several problems relating to the tectonics of burial of vast area and mechanisms involved in expelling initial H2O (causes of dryness) for granulite facies metamorphism. It is possible to infer the following sequence of events based on the field and laboratory studies: (1) derivation of protoliths of KKB from granitic uplands and deposition in fault bounded basin (cratonic rift); (2) subhorizontal deep burial of sediments; (3) intense deformation of infra and supracrustal rocks; (4) early granulite facies metamorphism predating F sub 2 - loss of primary structure in sediments and formation of charnockites from amphibole bearing gneisses and khondalites from pelites; (5) migmatisation and deformation of metasediments and gneisses; (6) second event of charnockite formation probably aided by internal CO2 build-up; and (7) isothermal uplift, entrapment of late CO2 and mixed CO2-H2O fluids, formation of second generation cordierites and cordierite symplectites.
    Schlagwort(e): GEOPHYSICS
    Materialart: Lunar and Planetary Inst., Workshop on the Deep Continental Crust of South India; p 149-150
    Format: application/pdf
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  • 4
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    Water activities in the Kerala Khondalite Belt (1988)
    In:  CASI
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    Publikationsdatum: 2013-08-31
    Beschreibung: The author and colleagues presented their determinations of water activities in various granulite-facies rocks of the Kerala Khondalite Belt. Using mineral equilibria, thermodynamic data, and assumed geopressure-geotemperature conditions of 5.5 kbar and 750 C, they calculated uniformly low a(H2O) values of about 0.27 over a large geographic region. They suggested that these conditions were produced by the presence of abundant CO2-rich fluids, derived either from deeper levels or from metamorphic reactions involving graphite.
    Schlagwort(e): GEOPHYSICS
    Materialart: Lunar and Planetary Inst., Workshop on the Deep Continental Crust of South India; p 40-42
    Format: application/pdf
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  • 5
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    A Unified Approach to Modeling Multidisciplinary Interactions (2000)
    In:  CASI
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    Publikationsdatum: 2019-07-13
    Beschreibung: There are a number of existing methods to transfer information among various disciplines. For a multidisciplinary application with n disciplines, the traditional methods may be required to model (n(exp 2) - n) interactions. This paper presents a unified three-dimensional approach that reduces the number of interactions from (n(exp 2) - n) to 2n by using a computer-aided design model. The proposed modeling approach unifies the interactions among various disciplines. The approach is independent of specific discipline implementation, and a number of existing methods can be reformulated in the context of the proposed unified approach. This paper provides an overview of the proposed unified approach and reformulations for two existing methods. The unified approach is specially tailored for application environments where the geometry is created and managed through a computer-aided design system. Results are presented for a blended-wing body and a high-speed civil transport.
    Schlagwort(e): Engineering (General)
    Materialart: AIAA Paper 2000-4704 , Multidisciplinary Analysis and Optimization; Sep 06, 2000 - Sep 08, 2000; Long Beach, CA; United States
    Format: application/pdf
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  • 6
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    Thermal conductivity of comets (1975)
    In:  Other Sources
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    Publikationsdatum: 2019-07-13
    Beschreibung: The thermal conductivity of two comet models is calculated. Both models assume the comets to be heterogeneous in composition. One model considers the comet to have a nucleus of water-ice mixed with basaltic and meteoritic material in the form of dust and agglomerated particles surrounded by a layer of water-frost. The second model assumes the frost and water-ice layers have sublimated, leaving a porous structure to some depth composed of solid basaltic and meteoritic material with residual gases. K values are calculated as a function of depth, density, temperature and porosity.
    Schlagwort(e): ASTROPHYSICS
    Materialart: AIAA PAPER 75-199 , American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting; Jan 20, 1975 - Jan 22, 1975; Pasadena, CA
    Format: text
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  • 7
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    Thermal conductivity of comets (1974)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A value is described for the thermal conductivity of the frost layer and for the water-ice solid debris mixture. The value of the porous structure is discussed as a function of depth only. Graphs show thermal conductivity as a function of depth and temperature at constant porosity and density.
    Schlagwort(e): ASTRONOMY
    Materialart: NASA-CR-120524
    Format: application/pdf
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  • 8
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    Comparison of FDNS liquid rocket engine plume computations with SPF/2 (1993)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Prediction of a plume's shape and structure is essential to the evaluation of base region environments. The JANNAF standard plume flowfield analysis code SPF/2 predicts plumes well, but cannot analyze base regions. Full Navier-Stokes CFD codes can calculate both zones; however, before they can be used, they must be validated. The CFD code FDNS3D (Finite Difference Navier-Stokes Solver) was used to analyze the single plume of a Space Transportation Main Engine (STME) and comparisons were made with SPF/2 computations. Both frozen and finite rate chemistry models were employed as well as two turbulence models in SPF/2. The results indicate that FDNS3D plume computations agree well with SPF/2 predictions for liquid rocket engine plumes.
    Schlagwort(e): SPACECRAFT PROPULSION AND POWER
    Materialart: AIAA PAPER 93-2350 , AIAA, SAE, ASME, and ASEE, Joint Propulsion Conference and Exhibit; Jun 28, 1993 - Jun 30, 1993; Monterey, CA; United States|; 19 p.
    Format: text
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