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Numerical study of boundary layer injection as a scale control method

Description: A boundary layer injection method of controlling scale-buildup in geothermal two-phase flow nozzles is studied. The object of this study is to set an upper limit on the ratio of the injected mass flow rate to the free stream mass flow rate that is necessary to isolate the scale carrying free stream flow from the nozzle wall. In order to develop a numerical model of the boundary layer flow, assumptions are made which reduce the results to order of magnitude approximations. Two configurations of … more
Date: September 26, 1975
Creator: Feiereisen, W.
Partner: UNT Libraries Government Documents Department
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New EOS for air

Description: No Description Available.
Date: September 16, 1975
Creator: Graboske, H. C.
Partner: UNT Libraries Government Documents Department
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Systems for nuclear auxiliary power. Annual report, government fiscal year 1975. [Space and subsea systems]

Description: For the past two decades, programs have been conducted to develop ZrH reactor space power systems. Present development plans for reactor space system components are geared to the development of off-the-shelf standardized reactor components which can be used without modification in either Brayton, thermoelectric (TE), or organic Rankine power systems over a power range of 3 to 15 kW(e). In recent years, national energy programs have highlighted the need to increase production of oil and gas from… more
Date: September 30, 1975
Partner: UNT Libraries Government Documents Department
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Heavy Section Steel Technology Program. Irradiation effects on the fracture toughness of heavy section pressure vessel steels. Quarterly progress report for period ending August 31, 1975

Description: The recovery by postirradiation annealing of the irradiation produced shift in the fracture toughness transition of A533-B was investigated. Irradiation embrittlement was reduced by 40% after annealing at 600/sup 0/F for material that had been irradiated to approximately 2 x 10/sup 19/ n/cm/sup 2/ at 550/sup 0/F.
Date: September 1, 1975
Creator: Williams, J.A.
Partner: UNT Libraries Government Documents Department
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Simulation of fluid-rock interactions in a geothermal basin. Final report. [QUAGMR (quasi-active geothermal reservoir)]

Description: General balance laws and constitutive relations are developed for convective hydrothermal geothermal reservoirs. A fully interacting rock-fluid system is considered; typical rock-fluid interactions involve momentum and energy transfer and the dependence of rock porosity and permeability upon the fluid and rock stresses. The mathematical model also includes multiphase (water/steam) effects. A simple analytical model is employed to study heat transfer into/or from a fluid moving in a porous mediu… more
Date: September 1, 1975
Creator: Garg, S. K.; Blake, T. R.; Brownell, D. H. Jr.; Nayfeh, A. H. & Pritchett, J. W.
Partner: UNT Libraries Government Documents Department
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Review of geothermal subsidence

Description: Forty-nine citations are included most of which deal with geothermal subsidence. Other citations deal with subsidence caused by groundwater overdraft and oil and gas exploitation. Most of the entries have abstracts. A subject index, an author index, a list of references, and a glossary are included. (MHR)
Date: September 1, 1975
Creator: Phillips, S. L.; Fair, J. A.; Henderson, F. B. III & Schwartz, S. R.
Partner: UNT Libraries Government Documents Department
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Optimization of thermodynamic efficiency in binary-type geothermal electric power generating plants

Description: Calculations and curves are presented which prove that for each turbine entry temperature, there is an entry pressure which will optimize the thermodynamic efficiency of a ''binary'' type geothermal power plant. Comparisons are made between thermodynamic efficiency and another method of rating process efficiency.
Date: September 1, 1975
Creator: Eno, E.
Partner: UNT Libraries Government Documents Department
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Mineral sources of water in evaporite sequences (salado salt and adjacent beds at the proposed waste disposal facility near Carlsbad in Lea and Eddy Counties, New Mexico)

Description: Results of this study indicates that the Salado Salt is composed primarily of fine to coarse-grained halite with polyhalite, anhydrite, and clay minerals. Other minerals detected in small amounts include gypsum, magnesite, quartz, feldspar, sylvite, carnallite, celestite(question), glauconite, and kainite(question). Petrographic evidence (hopper crystals, and intergrowth of halite with other minerals) indicate that the Salado Salt was deposited in rather shallow water and may have been exposed … more
Date: September 1, 1975
Creator: Kopp, O. C. & Combs, D. W.
Partner: UNT Libraries Government Documents Department
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Low Cost High Performance Generator Technology Program. Addendum Report

Description: The results of a system weight, efficiency, and size analysis which was performed on the 500 W(e) low cost high performance generator (LCHPG) are presented. The analysis was performed in an attempt to improve system efficiency and specific power over those presented in June 1975, System Design Study Report TES-SNSO-3-25. Heat source volume, configuration, and safety as related to the 500 W(e) LCHPG are also discussed. (RCK)
Date: September 1, 1975
Partner: UNT Libraries Government Documents Department
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Continuum Theory of Ductile Rupture by Void Nucleation and Growth. Part I. Yield Criteria and Flow Rules for Porous Ductile Media

Description: Widely used constitutive laws for engineering materials assume plastic incompressibility and no effect on yield of the hydrostatic component of stress. However, void nucleation and growth (and thus bulk dilatancy) are commonly observed in some processes which are characterized by large local plastic flow, such as ductile fracture. The purpose of this work is to develop approximate yield criteria and flow rules for porous (dilatant) ductile materials, showing the role of hydrostatic stress in pl… more
Date: September 1, 1975
Creator: Gurson, A. L.
Partner: UNT Libraries Government Documents Department
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Creep analysis of structures using a new equation of state type constitutive relation

Description: A computational scheme is presented for the analysis of a certain class of problems involving creep of metals at elevated temperatures. The high temperature nonelastic behavior of materials is assumed to obey a new mechanical equation of state type constitutive relation recently proposed by Hart. As an illustration, the problem of creep of a closed-ended thick-walled cylinder under internal and external pressures is analyzed employing the proposed computational scheme and Hart's equation of sta… more
Date: September 1, 1975
Creator: Kumar, V. & Mukherjee, S.
Partner: UNT Libraries Government Documents Department
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Hydrography of Onslow Bay, North Carolina: September 1975 (OBIS II)

Description: Data collected during studies of Onslow Bay, off the North Carolina coast during cruises during September, 1975, are reported. Current meters and thermography were placed at depths of 10 and 22 m along the 28 m isobath in the northeastern and southwestern sectors of the Bay. Data are included on wind turbulence and velocity; seawater salinity and temperature at various depths; the content of nitrates, phosphates, silicate, oxygen, chlorophyll, and phytoplankton biomass at various depths. Hydrog… more
Date: September 1, 1975
Creator: Atkinson, L. P.; Singer, J. J.; Dunstan, W. M. & Pietrafesa, L. J.
Partner: UNT Libraries Government Documents Department
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