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The Use of Laboratory High Frequency Induction Furnaces

Description: Equations are derived for the rates of heating of objects in induction furnaces and for the maximum temperatures attainable. The equations are primarily useful in designing conducting crucibles, shells, and cylinders so as to increase the power input and decrease heat losses. A very brief treatment is given of the factors which influence the current in the induction coil. The performances of various induction furnaces are compared.
Date: April 3, 1950
Creator: Brewer, Leo, 1919-2005
Partner: UNT Libraries Government Documents Department
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Choking of a Subsonic Induction Tunnel by the Flow from an Induction Nozzle

Description: Note presenting experimental data demonstrating the decrease in stream Mach number observed to occur as the pressure of the inducing air in an induction nozzle was increased in the high-subsonic speed range. This performance characteristic was analytically demonstrated to be associated with choking of the induced flow.
Date: July 1952
Creator: Lindsey, W. F.
Partner: UNT Libraries Government Documents Department
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Induction Furnace Testing of the Durability of Prototype Crucibles in a Molten Metal Environment

Description: Engineered ceramic crucibles are commonly used to contain molten metal. Besides high temperature stability, other desired crucible characteristics include thermal shock resistance, minimal reaction with the molten metal and resistance to attack from the base metal oxide formed during melting. When used in an induction furnace, they can be employed as a “semi-permanent” crucible incorporating a dry ram backup and a ceramic cap. This report covers several 250-lb single melt crucible tests in an a… more
Date: 2005-09~
Creator: Jablonski, Paul D.
Partner: UNT Libraries Government Documents Department
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Efficient Inversion of Multi-frequency and Multi-source Electromagnetic Data: Final report

Description: BES grant DE-FG02-06ER15819 supported efforts at Oregon State University (OSU) to develop improved inversion methods for 3D subsurface electromagnetic (EM) imaging. Three interrelated activities have been supported by this grant, and its predecessor (DE-FG02-06ER15818): (1) collaboration with a former student of the PI, Dr. Weerachai Siripunvaraporn (now Professor at Mahidol University in Bangkok, Thailand) on developing and refining inversion methods for 3D Magnetotelluric (MT) data . (2) Deve… more
Date: April 10, 2013
Creator: Egbert, Gary D.
Partner: UNT Libraries Government Documents Department
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Cold Crucible Induction Melter Technology: Results of Laboratory Directed Research and Development

Description: This report provides a review of cold crucible induction melter (CCIM) technology and presents summaries of alternatives and design issues associated with major system components. The objective in this report is to provide background systems level information relating to development and application of cold crucible induction-heated melter technology for radiological waste processing. Included is a detailed description of the bench-top melter system at the V. G. Khlopin Radium Institute currentl… more
Date: September 1, 2001
Creator: Gombert, Dirk & Richardson, John Grant
Partner: UNT Libraries Government Documents Department
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Efficient Inversion of Mult-frequency and Multi-Source Electromagnetic Data

Description: The project covered by this report focused on development of efficient but robust non-linear inversion algorithms for electromagnetic induction data, in particular for data collected with multiple receivers, and multiple transmitters, a situation extremely common in eophysical EM subsurface imaging methods. A key observation is that for such multi-transmitter problems each step in commonly used linearized iterative limited memory search schemes such as conjugate gradients (CG) requires solution… more
Date: March 22, 2007
Creator: Egbert, Gary D.
Partner: UNT Libraries Government Documents Department
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A Simple Model for Induction Core Voltage Distributions

Description: In fall 2003 T. Hughes of MRC used a full EM simulation code (LSP) to show that the electric field stress distribution near the outer radius of the longitudinal gaps between the four Metglas induction cores is very nonuniform in the original design of the DARHT-2 accelerator cells. In this note we derive a simple model of the electric field distribution in the induction core region to provide physical insights into this result. The starting point in formulating our model is to recognize that th… more
Date: July 1, 2004
Creator: Briggs, Richard J. & Fawley, William M.
Partner: UNT Libraries Government Documents Department
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Campaign to minimize the transverse impedance of the DARHT-2 induction linac cells

Description: This paper discusses the multi-year ''campaign'' to measure and reduce the transverse impedances of the original DARHT-2 accelerator cells in order to limit the beam-breakup instability (BBU) growth through the machine. A series of three prototype cells were designed, modeled, and measured. One of the most important methods for limiting the impedance was the introduction of ferrite absorbers in the oil region immediately upstream of the insulator. When properly tuned in terms of thickness, the … more
Date: January 20, 2005
Creator: Briggs, Richard J. & Fawley, William M.
Partner: UNT Libraries Government Documents Department
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Understanding the unbalanced-voltage problem in wind turbine generation

Description: Most wind turbines are equipped with line-connected induction generators. Induction generators are very attractive as wind turbine generators due to their low cost, ruggedness and the need for little or no maintenance. At constant frequency, the induction generator operates in a small range of speeds and, therefore, it operated with a small range of slips with respect to synchronous speed. Compared to a synchronous generator, an induction generator provides lower stiffness, thus alleviating the… more
Date: February 28, 2000
Creator: Muljadi, E.; Butterfield, C.P.; Batan, T. & Yildirim, D.
Partner: UNT Libraries Government Documents Department
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Advanced Modeling of Cold Crucible Induction Melting for Process Control and Optimization

Description: The Idaho National Laboratory (INL) and the St. Petersburg Electrotechnical University “LETI” (ETU) have collaborated on development and validation of an advanced numerical model of the cold crucible induction melting (CCIM) process. This work was conducted in support of the Department of Energy (DOE) Office of Environmental Management Technology and Engineering (EM-20) International Program. The model predicts quasi-steady state temperature distributions, convection cell configurations, and fl… more
Date: February 1, 2008
Creator: Roach, J. A.; Lopukh, D. B.; Martynov, A. P.; Polevodov, B. S. & Chepluk, S. I.
Partner: UNT Libraries Government Documents Department
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Beam Simulations for IRE and Driver-Status and Strategy

Description: The methods and codes employed in the U.S. Heavy Ion Fusion program to simulate the beams in an Integrated Research Experiments (IRE) facility and a fusion driver are presented in overview. A new family of models incorporating accelerating module impedance, multi-beam, and self-magnetic effects is described, and initial WARP3d particle simulations of beams using these models are presented. Finally, plans for streamlining the machine-design simulation sequence, and for simulating beam dynamics f… more
Date: March 1, 2000
Creator: Friedman, A.; Grote, D. P.; Lee, E. P. & Sonnendrucker, E.
Partner: UNT Libraries Government Documents Department
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Approximate effect of leading-edge thickness, incidence angle, and inlet mach number on inlet losses for high-solidity cascades of low cambered blades

Description: Report presenting an approximate, theoretical analysis of the inlet or induction losses due to subsonic flow into a high-solidity cascade of finite thickness blades at incidence angle. Results indicated that the losses can become considerable for large deviations from the design incidence such as compressor off-design operating conditions. Results regarding the computational results, significance of assumptions and limitations, comparison of theoretical approximation with actual compressor resu… more
Date: December 1954
Creator: Wright, Linwood C.
Partner: UNT Libraries Government Documents Department
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An Experimental Investigation at Subsonic Speeds of a Scoop-Type Air-Induction System for a Supersonic Airplane

Description: Report presenting an investigation at subsonic speeds of a scoop-type air-induction system designed for use at subsonic and supersonic speeds. Measurements of the ram-recovery ratio and static pressures in a scoop-type intake on the upper surface of the fuselage were taken for a large range of mass-flow ratios, angles of attack, and angles of sideslip.
Date: July 19, 1951
Creator: Holzhauser, Curt A.
Partner: UNT Libraries Government Documents Department
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Induction system characteristics and engine surge occurrence for two fighter-type airplanes

Description: Report presenting an investigation to measure and to compare the total-pressure recovery and distortion characteristics at the compressor face of two single-place fighter-type airplanes with similar two-spool turbo-jet engines, but with dissimilar inlets. Results regarding compressor-face total-pressure surveys and surges encountered are provided.
Date: May 26, 1958
Creator: Larson, Terry J.; Thomas, George M. & Bellman, Donald R.
Partner: UNT Libraries Government Documents Department
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ART CCIM Phase II-A Off-Gas System Evaluation Test Plan

Description: This test plan defines testing to be performed using the Idaho National Laboratory (INL) engineering-scale cold crucible induction melter (CCIM) test system for Phase II-A of the Advanced Remediation Technologies (ART) CCIM Project. The multi-phase ART-CCIM Project is developing a conceptual design for replacing the joule-heated melter (JHM) used to treat high level waste (HLW) in the Defense Waste Processing Facility (DWPF) at the Savannah River Site (SRS) with a cold crucible induction melter… more
Date: January 1, 2009
Creator: Soelberg, Nick & Roach, Jay
Partner: UNT Libraries Government Documents Department
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The pulsed linear induction motor concept for high-speed trains

Description: The SERAPBIM (SEgmented RAil PHased Induction Motor) concept is a linear induction motor concept which uses rapidly-pulsed magnetic fields and a segmented reaction rail, as opposed to low-frequency fields and continuous reaction rails found in conventional linear induction motors. These improvements give a high-traction, compact, and efficient linear motor that has potential for advanced high speed rail propulsion. In the SERAPBIM concept, coils on the vehicle push against a segmented aluminum … more
Date: June 1995
Creator: Turman, B. N.; Marder, B. M.; Rohwein, G. J.; Aeschliman, D. P.; Kelley, J. B.; Cowan, M. et al.
Partner: UNT Libraries Government Documents Department
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Recirculating induction accelerators for inertial fusion: Prospects and status

Description: The US is developing the physics and technology of induction accelerators for heavy-ion beam-driven inertial fusion. The recirculating induction accelerator repeatedly passes beams through the same set of accelerating and focusing elements, thereby reducing both the length and gradient of the accelerator structure. This promises an attractive driver cost, if the technical challenges associated with recirculation can be met. Point designs for recirculator drivers were developed in a multi-year s… more
Date: September 3, 1995
Creator: Friedman, A.; Barnard, J. J. & Cable, M. D.
Partner: UNT Libraries Government Documents Department
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Induction Consolidation of Thermoplastic Composites Using Smart Susceptors

Description: This project has focused on the area of energy efficient consolidation and molding of fiber reinforced thermoplastic composite components as an energy efficient alternative to the conventional processing methods such as autoclave processing. The expanding application of composite materials in wind energy, automotive, and aerospace provides an attractive energy efficiency target for process development. The intent is to have this efficient processing along with the recyclable thermoplastic mater… more
Date: June 14, 2012
Creator: Matsen, Marc R
Partner: UNT Libraries Government Documents Department
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Advanced titanium processing

Description: The Albany Research Center of the U.S. Department of Energy has been investigating a means to form useful wrought products by direct and continuous casting of titanium bars using cold-wall induction melting rather than current batch practices such as vacuum arc remelting. Continuous ingots produced by cold-wall induction melting, utilizing a bottomless water-cooled copper crucible, without slag (CaF2) additions had minor defects in the surface such as ''hot tears''. Slag additions as low as 0.5… more
Date: January 1, 2001
Creator: Hartman, Alan D.; Gerdemann, Stephen J.; Schrems, Karol K.; Holcomb, Gordon R.; Argetsinger, Edward R.; Hansen, Jeffrey S. et al.
Partner: UNT Libraries Government Documents Department
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