262
262
Jun 13, 2011
06/11
by
Larosiliere, Louis M
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Future aeropropulsion gas turbine engines must be affordable in addition to being energy efficient and environmentally benign. Progress in aerodynamic design capability is required not only to maximize the specific thrust of next-generation engines without sacrificing fuel consumption, but also to reduce parts count by increasing the aerodynamic loading of the compression system. To meet future compressor requirements, the NASA Glenn Research Center is investigating advanced aerodynamic design...
Topics: ACTIVE CONTROL, TEMPERATURE CONTROL, COOLANTS, ANOMALIES, NICKEL, ADDITIVES, MICROORGANISMS
1,102
1.1K
Jul 11, 2010
07/10
by
NON
texts
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The development of the ideas of F. A. Tsander and their realization in modern astronautics are traced in such areas as astrodynamics, the theory and design of motors and space vehicles, life support systems and astrobotanics. Considerable attention is given to analysis of the role and significance of the works of F. A. Tsander in the history of rocket and space science and technology.
Topics: AIRCRAFT ENGINES, ENGINE COOLANTS, HYPERSONIC AIRCRAFT, ENGINE DESIGN, MANUFACTURING, PERFORMANCE...
53
53
Jun 28, 2010
06/10
by
British Nuclear Energy Society
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Includes bibliographical references
Topics: Alkali metals, Liquid metals, Fast reactors Coolants: Liquid alkali metals Conference proceedings
Topics: DTIC Archive, Bolwell, Harry J, COMBUSTION ENGINEERING INC NEW YORK, *NUCLEAR POWER PLANTS,...
The report covers investigations relative to the selection and evaluation of edible substances that could alleviate the oral discomfort associated with thirst. A discussion is also made relative to the rationale of tests that utilize animals to screen substances for thirst-alleviating properties, screening tests that were evaluated, and description of the procedure used in experiments in which human taste panels were utilized to evaluate four substances that appeared to be effective in...
Topics: DTIC Archive, IIT RESEARCH INST CHICAGO IL, *COOLANTS, *THIRST, MOUTH, TASTE, TEST METHODS
210
210
Jun 27, 2010
06/10
by
Dugan, J. V., Jr.; Rose, J. R
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Simple argon model atoms used for calculating electron number densities for argon plasma discharges
Topics: CONDUCTING FLUIDS, ELECTROMAGNETIC PUMPS, COOLANTS, DUCTED FLOW, ELECTRIC GENERATORS, FARADAY...
379
379
May 21, 2011
05/11
by
Neel, Carr B , Jr; Bright, Loren
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No Abstract Available
Topics: ENGINE CYLINDER HEADS - TEMPERATURES, ENGINES, LIQUID-COOLED, HEAT TRANSMISSION - COOLANTS, ENGINES...
218
218
Jun 13, 2011
06/11
by
Litt, Jonathan S
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The current practice in aerospace turbine engine maintenance is to remove components defined as life-limited parts after a fixed time, on the basis of a predetermined number of flight cycles. Under this schedule-based maintenance practice, the worst-case usage scenario is used to determine the usable life of the component. As shown, this practice often requires removing a part before its useful life is fully consumed, thus leading to higher maintenance cost. To address this issue, the NASA...
Topics: VAPOR TRAPS, TEMPERATURE CONTROL, MEMBRANES, HYDROPHOBICITY, COOLANTS, INTERNATIONAL SPACE STATION,...
It is well known that any neutron-producing device generates induced radioactivity as a by-product of its operation. In the case of nuclear reactors, the induced radioactivity includes fission and activation products. The overall focus of this study is the build up of induced radioactivity in the coolant of metal cooled reactors as well as the evaluation of other physical and chemical properties of such coolants. The objectives of the thesis are two fold. The first objective is to independently...
Topics: DTIC Archive, Can, Levent, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *CHEMICAL PROPERTIES, *PHYSICAL...
The unusual operating conditions of nuclear power reactors necessitate the use of unusual coolants. Thus, one desires a coolant which possess a low cross section for absorbing neutrons, good heat-transfer efficiency, a low melting point and a high boiling point. The element gallium possesses some of the requisite properties. It is a unique material, having a very low melting point, and a very high boiling point. Being a liquid metal, the heat transfer characteristics would be good, though not...
Topics: DTIC Archive, Jaffee, R. I., TECHNICAL INFORMATION SERVICE (AEC) OAK RIDGE TN, *GALLIUM, *REACTOR...
Recently, attention has been drawn to the viability of using S-CO(2) as a working fluid in modern reactor designs. Near the critical point, CO2 has a rapid rise in density allowing a significant reduction in the compressor work of a closed Brayton Cycle. Therefore, 45% efficiency can be achieved at much more moderate temperatures than is optimal for the helium Brayton cycles. An additional benefit of the S-CO2 system is its universal applicability as an indirect secondary Power Conversion...
Topics: DTIC Archive, Freas, Rosemary M, MASSACHUSETTS INST OF TECH CAMBRIDGE, *NUCLEAR REACTORS,...
237
237
Jul 21, 2010
07/10
by
Carlson, J. R.; Pendergraft, O. C., Jr.; Burley, J. R., I
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A three-dimensional subsonic aerodynamic panel code (VSAERO) was used to predict the effects of upper and lower external nozzle flap geometry on the external afterbody/nozzle pressure coefficient distributions and external nozzle drag of nonaxisymmetric convergent-divergent exhaust nozzles having parallel external sidewalls installed on a generic twin-engine high performance aircraft model. Nozzle static pressure coefficient distributions along the upper and lower surfaces near the model...
Topics: ANTIFRICTION BEARINGS, RESONANT VIBRATION, ROTARY STABILITY, ROTATING SHAFTS, TURBINE PUMPS,...
Capsule consisting of tantalum shell lined with tantalum screen and partially filled with lithium and pieces of yttrium is immersed in hot lithium stream. Oxygen is removed from stream by being absorbed by gettering capsule. Oxygen passes through capsule wall and into lithium inside capsule where it reacts with yttrium to form Y2O3.
Topics: NASA Technical Reports Server (NTRS), COOLANTS, DEOXYGENATION, GETTERS, LIQUID METALS, LITHIUM,...
In planning for a return mission to the Moon, NASA aimed to improve the thermal control systems that keep astronauts comfortable and cool while inside a spacecraft. Goddard Space Flight Center awarded a Small Business Innovation Research (SBIR) contract to Mainstream Engineering Corporation, of Rockledge, Florida, to develop a chemical/mechanical heat pump. IDQ Inc., of Garland, Texas, exclusively licensed the technology and incorporates it into its line of Arctic Freeze products for automotive...
Topics: NASA Technical Reports Server (NTRS), AIR CONDITIONING, TEMPERATURE CONTROL, REFRIGERANTS,...
We found that Electrical breakdown in a PAO fluid results in the formation of submicron carbonaceous particles and some flammable gas which, more than likely, is hydrogen. An applied electric field generates significant streaming electrification in a PAO fluid. The Navy Oil Analysis Program procedures, which were developed in the 1980s for testing unstable Coolanol fluids, fail to test the degradation of hydrolytically stable PAO fluids currently used by the Navy. All the following measurements...
Topics: DTIC Archive, Khodorkovsky, Jacob, BELTRAN INC BROOKLYN NY, *HYDRAULIC FLUIDS, HEAT TRANSFER,...
Basic test results of a flat-plate solar collector whose performance was determined in the NASA-Lewis solar simulator are given. The collector was tested over ranges of inlet temperature and flux level.
Topics: NASA Technical Reports Server (NTRS), FLAT PLATES, PERFORMANCE TESTS, SOLAR COLLECTORS, COOLANTS,...
Topics: DTIC Archive, 309TH COMMODITIES MAINTENANCE GROUP HILL AFB BASE UT, *COOLANTS, *WASTE MANAGEMENT,...
IN CONNECTION WITH THE KNOWN PRESENCE OF Na2O in liquid sodium, which is often employed as a heat carrier, the possibility of electrolytic transfer of oxygen in the medium arises. This article describes an experimental check on this phenomenon conducted by the dc polarization method; the experiments were run at 300 C. An accumulation of transferred oxygen was actually determined in the anodic part of the molten metal. The findings confirmed the initial assumption that transfer is caused by...
Topics: DTIC Archive, LIBRARY OF CONGRESS WASHINGTON DC AEROSPACE TECHNOLOGY DIV, *SODIUM, *OXYGEN,...
Roof-spray cooling systems have been developed and implemented to reduce the heat gain through roofs so that conventional cooling systems can be reduced in size or eliminated. Currently, roof-spray systems are achieving greater effectiveness due to the availability of direct digital controls. The objective of this thesis was to develop a mathematical model of the heat transfer through a roof-spray cooled roof that predicted heat transfer based on existing weather data and roof heat transfer...
Topics: DTIC Archive, Clements, Joseph A, FLORIDA UNIV GAINESVILLE, *HEAT TRANSFER, *COOLANTS, *SPRAYS,...
338
338
Jun 18, 2010
06/10
by
Modisette, J. L
texts
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Lithium hydride and magnesium as high temperature internal coolants with skin materials
Topics: COOLANTS, MAGNESIUM, SKIN TEMPERATURE, HEAT TRANSFER, HIGH TEMPERATURE, LITHIUM HYDRIDES,...
The object of this investigation is to determine if Federal Specification 0-1-490a,,, Corrosion Inhibitor is suitable for use in vehicle cooling systems for extended periods. The improved inhibitor was placed in the vehicle cooling systems with antifreeze compounds meeting Federal Specification 0-A-548a, Type I, or commercial materials similar to the Type I. The inhibitor was added at the rate of 1 ounce per 2 quarts of water used in making up the antifreeze solution. Four government vehicles...
Topics: DTIC Archive, COATING AND CHEMICAL LAB ABERDEEN PROVING GROUND MD, *COOLANTS, INTERNAL, MELTING...
A shuttle (ARS) atmosphere revitalization subsystem active thermal control subsystem (ATCS) performance routine was developed. This computer program is adapted from the Shuttle EC/LSS Design Computer Program. The program was upgraded in three noteworthy areas: (1) The functional ARS/ATCS schematic has been revised to accurately synthesize the shuttle baseline system definition. (2) The program logic has been improved to provide a more accurate prediction of the integrated ARS/ATCS system...
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, SPACE SHUTTLES, SYSTEMS ANALYSIS,...
Liquid cooled helmet comprising a cap of flexible material adapted to fit the head of a person, cooling panels mounted inside the cap forming passageways for carrying a liquid coolant, the panels being positioned to engage the cranium and neck of a person wearing the helmet, inlet and outlet lines communicating with the passageways, and releasable straps for securing the helmet about the neck of the wearer.
Topics: NASA Technical Reports Server (NTRS), COOLANTS, COOLING, HELMETS, PANELS, PASSAGEWAYS, PATENTS,...
458
458
Jul 26, 2010
07/10
by
Sullivan, Jeanne Mari
texts
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A numerical optimization technique is used to fully automate the trajectory design process for an symmetric configuration of the proposed Advanced Launch System (ALS). The objective of the ALS trajectory design process is the maximization of the vehicle mass when it reaches the desired orbit. The trajectories used were based on a simple shape that could be described by a small set of parameters. The use of a simple trajectory model can significantly reduce the computation time required for...
Topics: LIFE (DURABILITY), FABRICATION, METAL BONDING, RELIABILITY, ROCKET THRUST, THRUST CHAMBERS, WEIGHT...
Topics: DTIC Archive, BELL, HOWARD, CALIFORNIA UNIV BERKELEY MATERIALS RESEARCH LAB, *BISMUTH, *LIQUID...
Advanced thermal systems developed for the Space Station Freedom project are now in use on the International Space Station. These thermal systems employ evaporative ammonia as their coolant, and though they employ the same series of chemical reactions as terrestrial refrigerators, the space-bound coolers are significantly smaller. Two Small Business Innovation Research (SBIR) contracts between Creare Inc. of Hanover, NH and Johnson Space Center developed an ammonia evaporator for thermal...
Topics: NASA Technical Reports Server (NTRS), MICROMACHINING, REFRIGERATORS, AMMONIA, EVAPORATORS,...
188
188
May 6, 2010
05/10
by
Stepka, F. S
texts
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Blade temperatures and coolant pressure losses for cascade of air-cooled turbine rotor blades
Topics: AIR COOLING, COOLANT, ROTOR BLADE, TEMPERATURE, TURBINE, CASCADES, COOLANTS, HEAT TRANSFER, ROTOR...
THe Institute of Advanced Manufacturing Sciences, Inc. (IAMS) in Cincinnati has conducted a program to evaluate the Flojet high pressure cryogenic coolant system on a number of common and difficult-to-machine materials and to analyze the economic benefits. This research contract was awarded under the Air Force's Machine Tool Products and Processes Program Research and Development Announcement (PRDA). The program included a continuing forum with interested industrial representatives to...
Topics: DTIC Archive, INSTITUTE OF ADVANCED MFG SCIENCES INC CINCINNATI OH, *MACHINE TOOLS, *COOLANTS,...
In what follows, the model used for combustion of liquid hydrogen (LH2) with liquid oxygen (LOX) using chemical equilibrium assumption, and the novel computational method developed for determining the equilibrium composition and temperature of the combustion products by application of the first and second laws of thermodynamics will be described. The modular FORTRAN code developed as a subroutine that can be incorporated into any flow network code with little effort has been successfully...
Topics: NASA Technical Reports Server (NTRS), COMBUSTION, LIQUID HYDROGEN, LIQUID OXYGEN, HEAT TRANSFER,...
208
208
Jul 11, 2010
07/10
by
Decker, A. J
texts
eye 208
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The electronic recording of pulsed-laser holograms is proposed. The polarization sensitivity of each resolution element of the detector is controlled independently to add an arbitrary phase to the image waves. This method which can be used to simulate heterodyne recording and to process three-dimensional optical images, is based on a similar method for heterodyne recording and processing of continuous-wave holograms.
Topics: ENGINE DESIGN, HYBRID PROPULSION, ORBIT TRANSFER VEHICLES, SPACECRAFT PROPULSION, ENGINE COOLANTS,...
The low thermal conductivity of titanium, together with the low contact area between chip and tool and the unusually high chip velocities, gives rise to high tool tip temperatures and accelerated tool wear. Machining speeds have to be considerably reduced to avoid these high temperatures with a consequential loss of productivity. Restoring this lost productivity involves increasing other machining variables, such as feed and depth-of-cut, and can lead to another machining problem commonly known...
Topics: NASA Technical Reports Server (NTRS), MACHINE TOOLS, TITANIUM, WEAR, CHIPPING, COATINGS, COOLANTS,...
842
842
Jun 21, 2010
06/10
by
ZAKHARIN, M. I., et al
texts
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METHODS FOR DETERMINING INSTANTANEOUS VALUES OF AIRCRAFT PARAMETERS WITH INERTIAL NAVIGATION SYSTEMS
Topics: FAILURE ANALYSIS, MALFUNCTIONS, REACTOR SAFETY, SPACE POWER UNIT REACTORS, COOLANTS, FAST NUCLEAR...
A versatile code is described for computing the coupled thermionic electric-thermal performance of long thermionic converters in which the temperature and voltage variations cannot be neglected. The code is capable of accounting for a variety of external electrical connection schemes, coolant flow paths and converter failures by partial shorting. Example problem solutions are included along with a user's manual.
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, THERMIONIC CONVERTERS, COOLANTS, HEAT...
A system and method are provided for cooling a crystal rod of a side-pumped laser. A transparent housing receives the crystal rod therethrough so that an annular gap is defined between the housing and the radial surface of the crystal rod. A fluid coolant is injected into the annular gap such the annular gap is partially filled with the fluid coolant while the radial surface of the crystal rod is wetted as a thin film all along the axial length thereof.
Topics: NASA Technical Reports Server (NTRS), COOLANTS, EVAPORATIVE COOLING, LASERS, THIN FILMS, CRYSTALS,...
The IATCS coolant has experienced a number of anomalies in the time since the US Lab was first activated on Flight 5A in February 2001. These have included: 1) a decrease in coolant pH, 2) increases in inorganic carbon, 3) a reduction in phosphate buffer concentration, 4) an increase in dissolved nickel and precipitation of nickel salts, and 5) increases in microbial concentration. These anomalies represent some risk to the system, have been implicated in some hardware failures and are suspect...
Topics: NASA Technical Reports Server (NTRS), ACTIVE CONTROL, TEMPERATURE CONTROL, COOLANTS, ANOMALIES,...
436
436
Jul 26, 2010
07/10
by
Senor, David; Hayes, Steve; Beard, Carl; Archer, Darryl; Graves, Michae
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No Abstract Available
Topics: AIR COOLING, BELL AIRCRAFT, ENGINE TESTS, HEAT TRANSFER, PRESSURE EFFECTS, ENGINE COOLANTS, HIGH...
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172
Jul 21, 2010
07/10
by
Draine, B. T
texts
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Dust formation around cool giant and supergiant stars is examined in terms of grain formulation. Optical properties of small clusters, molecular physics of cluster nucleation and growth, circumstellar mass flows, and their application to alpha Ori are discussed.
Topics: COMPUTERIZED SIMULATION, LIQUID OXYGEN, SPACE SHUTTLE MAIN ENGINE, TURBINE PUMPS, COOLANTS, GRAPHS...
A unit for producing hydrogen on site is used by a New Jersey Electric Company. The hydrogen is used as a coolant for the station's large generator; on-site production eliminates the need for weekly hydrogen deliveries. High purity hydrogen is generated by water electrolysis. The electrolyte is solid plastic and the control system is electronic. The technology was originally developed for the Gemini spacecraft.
Topics: NASA Technical Reports Server (NTRS), TECHNOLOGY UTILIZATION, COOLANTS, ELECTROLYSIS, WATER...
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320
May 6, 2010
05/10
by
Nachtigall, A. J.; Slone, H. O
texts
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Fuel-cooled turbine blades with return-flow type of finned coolant passages
Topics: COOLANTS, FUEL, LIQUID PROPELLANT, REVERSED FLOW, TURBINE BLADE, FINNED BODIES, FUELS, HIGH...
This report gives an account of progress for the period December 21, 1960 to January 20, 1961. The information is presented in two (2) sections. The first section describes the work performed on Task A, Development of Ultra- High Strength Rocket Cases by Cryogenic Stretch Forming. The second section reports progress on Task B, Cooled Solid Propellant Rocket Nozzles.
Topics: DTIC Archive, ARDE-PORTLAND INC PARAMUS NJ, *ROCKET ENGINE CASES, *ROCKET NOZZLES, ALUMINUM ALLOYS,...
INFORMATION (based on foreign sources) on the properties of liquid metals used as coolants in nuclear reactors is presented. The topics discussed are: (1) heat transfer (in the liquid phase or during boiling and condensation) ; (2) the interaction of liquid metals with structural materials; (3) methods for removing impurities from liquid metals; and (4) the peculiarities of design and operation of systems with liquidmetal coolants. Requirements to be met by heattransfer media used in nuclear...
Topics: DTIC Archive, ANDREYEV, P A, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, *NUCLEAR POWER PLANTS,...
A cooling apparatus includes a container filled with a quantity of coolant fluid initially cooled to a solid phase, a cooling loop disposed between a heat load and the container, a pump for circulating a quantity of the same type of coolant fluid in a liquid phase through the cooling loop, and a pair of couplings for communicating the liquid phase coolant fluid into the container in a direct interface with the solid phase coolant fluid.
Topics: NASA Technical Reports Server (NTRS), COOLANTS, COOLING, COUPLING, LIQUID PHASES, SOLID PHASES,...
The Belvoir Research, Development and Engineering Center (BRDEC) was requested by the USAF to assist in evaluating the effectiveness of commercially offered used antifreeze recycling systems. BRDEC was solicited for assistance because of its mission responsibility for military antifreeze and because it is the preparing activity for antifreeze under MIL-A-46153. This report evaluates three commercial recycling systems using antifreeze samples collected and processed at both Tyndall AFB, FL, and...
Topics: DTIC Archive, Davis, Dwayne, ARMY BELVOIR RESEARCH DEVELOPMENT AND ENGINEERING CENTER FORT BELVOIR...
In active cooling of a structure it is beneficial to use a plurality of passages for conducting coolant to various portions of the structure. Since most structures do not undergo isotropic thermal loads it is desirable to allow for variation in coolant flow to each area of the structure. The present invention allows for variable flow by a variation of the area of a portion of each of the coolant passages. Shape memory alloys and bi-material springs are used to produce passages that change flow...
Topics: NASA Technical Reports Server (NTRS), COOLANTS, COOLING SYSTEMS, ISOTROP, INVENTIONS, SHAPE MEMORY...
The objective of the research was to determine the feasibility of prospecting for, tapping, and recovering ground water, working from within fallout shelter boundaries, for use as a shelter ventilating air coolant. A literature search was made into the background of established techniques of soil penetration and well construction, with particular emphasis on those that might lend themselves to manual operation in the event of a complete absence of power. The background study permitted an...
Topics: DTIC Archive, STANFORD RESEARCH INST MENLO PARK CA, *WATER, *COOLANTS, *FALLOUT SHELTERS,...
The purpose of this manual is to describe the use of the Seasonal Thermal Energy Storage (STES) technology, particularly through the employment of wintertime cooling. The technology is a means to solve excessive temperature increase in ground source heat pump loops and subsurface media. It gives an example of a recently demonstrated application and provides Energy Managers (EM) and Facility managers (FM) the background to quickly prioritize and document application projects to increase energy...
Topics: DTIC Archive, Falta,Ronald W, Clemson University Clemson United States, heat pumps, energy storage,...
Multiple high temperature liquid cooled power converters are being developed for use in future military applications under several TARDEC funded efforts. All of these converters utilize multiple silicon carbide devices packaged into larger modules. This paper presents performance (volume, mass, efficiency, etc) and test results for four different converters where the inlet coolant temperatures range up to 100 C. The first converter provides 28 Volt isolated power at 30 kW from a nominal 300...
Topics: DTIC Archive, SCIENCE APPLICATIONS INTERNATIONAL CORP (SAIC) AUSTIN TX, *CONVERTERS, *MILITARY...
Nanoparticles dispersed in base fluids have shown that they have increased thermal conductivity and increased heat transfer potential. In practical applications, these particles agglomerate in nanofluid to form aggregates, as opposed to completely dispersing in the base fluid. The resulting nanofluid has a size distribution of aggregated nanoparticles at different length scales. The mechanism that causes the enhanced thermal characteristics in nanofluids has not been widely researched in terms...
Topics: DTIC Archive, ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI,...
A cooling assembly for fuel cells having a simplified construction whereby coolant is efficiently circulated through a conduit arranged in serpentine fashion in a channel within a member of such assembly. The channel is adapted to cradle a flexible, chemically inert, conformable conduit capable of manipulation into a variety of cooling patterns without crimping or otherwise restricting of coolant flow. The conduit, when assembled with the member, conforms into intimate contact with the member...
Topics: NASA Technical Reports Server (NTRS), CONSTRUCTION, COOLANTS, COOLING, FUEL CELLS, PIPES (TUBES),...
An aqueous mineral oil and nitrite-free cooling lubricant for noncutting and cutting metal working is characterized by a combination of alkysulfamido carboxylic acids of their salts with a chain length of at least 6 C atoms with polyethylene glycols having a molecular weight of from 200 to 1500 and, if necessary, additional additives to improve the dissolvability characteristics and the corrosion protection, such as organic bases, preferably triethanolamine, alkanolamine or alkaline salts of...
Topics: DTIC Archive, Landbeck, Martin, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, *CUTTING FLUIDS,...
