Search Results

Advanced search parameters have been applied.
open access

Effect of air distribution on radial temperature distribution in one-sixth sector of annular turbojet combustor

Description: Report presenting an experimental investigation in a one-sixth sector of an annular turbojet combustor to determine a method of controlling radial exhaust-gas-temperature distribution in a gas-turbine combustion chamber. The adjustment in controlling air was made by ducting the dilution air into the combustion zone in a predetermined manner through hollow radial struts or by modifying the basket-wall open-hole area. Results regarding the temperature distribution, temperature-rise efficiency, to… more
Date: April 5, 1950
Creator: Mark, Herman & Zettle, Eugene V.
Partner: UNT Libraries Government Documents Department
open access

The Location of the Maximum Temperature on the Cutting Edges of a Drill

Description: This study analyzes the temperature profile along the cutting edges of a drill and describes how the temperature on the chisel edge can exceed the temperature on the primary cutting edges. A finite element model predicts the temperature distribution in the drill, where the heat flux loads applied to the finite element model are determined from analytical equations. The model for the heat flux loads considers both the heat generated on the shear plane and the heat generated on the rake face of t… more
Date: January 7, 2005
Creator: Bono, M J & Ni, J
Partner: UNT Libraries Government Documents Department
open access

Distribution of excess temperature from the Morgantown Generating Station on the Potomac Estuary

Description: Research undertaken to determine the effects of thermal effluents on the temperature distribution in estuarine waters is described. Procedures for and results from measurements of the temperature, river flow, tidal currents, salinity, wind, etc at the Potomac River estuary in 1969 and 1972, which represent pre- and post-operation conditions for the operation of the fossil- fueled Morgantown power plant, are reported. (LC L)
Date: October 1973
Creator: Carter, H.H.
Partner: UNT Libraries Government Documents Department
open access

Development of a Rolling Process Design Tool for Use in Improving Hot Roll Slab Recovery Quarterly Report: Q1 FY03

Description: In this quarter, further analysis was done to investigate the difficulty in predicting fracture at the slab ends. The stress concentration created by the notch geometry at the slab ends can accelerate damage and promote fracture at the relatively low strain rates that exist when the notch region is not directly in the roll bite. However, the phenomenological fracture model provided by Alcoa Technical Center (ATC) was calibrated for strain rates characteristic of the rolling process zone and hyd… more
Date: February 3, 2003
Creator: Couch, R & Wang, P
Partner: UNT Libraries Government Documents Department
open access

Over Voltage in a Multi-sectioned Solenoid during a Quenching

Description: Accurate analysis of over voltage in the superconducting solenoid during a quench is one of the bases for quench protection system design. Classical quench simulation methods can only give rough estimation of the over voltage within a magnet coil. In this paper, for multi-sectioned superconducting solenoid, based on the classical assumption of ellipsoidal normal zone, three-dimension al temperature results are mapped to the one-dimension of the wire, the temperature distribution along the wire … more
Date: June 21, 2009
Creator: Guo, Xinglong; Wang, Li; Pan, Heng; Wu, Hong; Liu, Xiaokun; Chen, Anbin et al.
Partner: UNT Libraries Government Documents Department
open access

Laboratory simulations of supernova shockwaves: Formation of a second shock ahead of a radiative shock

Description: Supernovae launch spherical shocks into the circumstellar medium (CSM). These shocks may interact with both the intergalactic magnetic field (IGM) and local mass accumulations (possibly with their own local magnetic fields). The latter interaction may trigger star formation. The shocks have high Mach numbers and may be radiative. We have created similar shocks in the laboratory by focusing laser pulses onto the tip of a solid pin surrounded by ambient gas; ablated material from the pin rapidly … more
Date: January 28, 2005
Creator: Hansen, J. F.; Edwards, M. J.; Froula, D.; Gregori, G.; Edens, A. & Ditmire, T.
Partner: UNT Libraries Government Documents Department
open access

Effect of Flux Adjustments on Temperature Variability in Climate Models

Description: It has been suggested that ''flux adjustments'' in climate models suppress simulated temperature variability. If true, this might invalidate the conclusion that at least some of observed temperature increases since 1860 are anthropogenic, since this conclusion is based in part on estimates of natural temperature variability derived from flux-adjusted models. We assess variability of surface air temperatures in 17 simulations of internal temperature variability submitted to the Coupled Model Int… more
Date: December 27, 1999
Creator: Duffy, P.; Bell, J.; Covey, C. & Sloan, L.
Partner: UNT Libraries Government Documents Department
open access

Pattern of Thermal Fluctuations in a Recovery Boiler Floor

Description: The floor of a black liquor recovey boiler at a mill in central Canada has experienced cracking and delamination of the composite tubing near the spout wall and deformation of the floor panels that is most severe in the vicinity of the spout wall. One possible explanation for the observed damage is impacts of salt cake falling from the convective section onto the floor. In order to determine if such impacts do occur, strain gauges and thermocouples were installed on the boiler floor in areas wh… more
Date: April 25, 1999
Creator: Abdullah, Z.; Gorog, J. P.; Keiser, J. R.; Meyers, L. E. & Swindeman, R. W.
Partner: UNT Libraries Government Documents Department
open access

Parametric thermal evaluations of waste package emplacement

Description: Parametric thermal evaluations of spent nuclear fuel (SNF) waste packages (WPs) emplaced in the potential repository were performed to determine the impact of thermal loading, WP spacing, drift diameter, SNF aging, backfill, and relocation on the design of the Engineered Barrier System. Temperatures in the WP and near-field host rock are key to radionuclide containment, as they directly affect oxidation rates of the metal barriers and the ability of the rock to impede particle movement which mu… more
Date: February 1, 1996
Creator: Bahney, R. H., III & Doering, T. W.
Partner: UNT Libraries Government Documents Department
open access

AC Loss Analysis on the Superconducting Coupling Magnet in MICE

Description: A pair of coupling solenoids is used in MICE experiment to generate magnetic field which keeps the muons within the iris of thin RF cavity windows. The coupling solenoids have a 1.5-meter inner diameter and will produce 7.4 T peak magnetic field. Three types of AC losses in coupling solenoid are discussed. The affect of AC losses on the temperature distribution within the cold mass during charging and rapid discharging process is analyzed also. The analysis result will be further confirmed by t… more
Date: July 8, 2008
Creator: Wu, Hong; Wang, Li; Green, Michael; Li, LanKai; Xu, FengYu; Liu, XiaoKun et al.
Partner: UNT Libraries Government Documents Department
open access

Nitrogen system for the SSC

Description: The Superconducting Super Collider consists of two parallel magnet rings, each 87,120 m in circumference, constructed in a tunnel 25 m to 74 m below ground level. They are operated at a controlled low helium temperature in order to maintain the magnet windings in the superconducting state. To obtain this condition, the magnet cryostat is designed with a high-quality insulation obtained by a high vacuum chamber, multilayer insulation, and thermal shields at nominal temperatures of 84 K and 20 K.… more
Date: October 1, 1992
Creator: McAshan, M.; Thirumaleshwar, M.; Abramovich, S. & Ganni, V.
Partner: UNT Libraries Government Documents Department
open access

HIERARCHICAL METHODOLOGY FOR MODELING HYDROGEN STORAGE SYSTEMS. PART I: SCOPING MODELS

Description: Detailed models for hydrogen storage systems provide essential design information about flow and temperature distributions, as well as, the utilization of a hydrogen storage media. However, before constructing a detailed model it is necessary to know the geometry and length scales of the system, along with its heat transfer requirements, which depend on the limiting reaction kinetics. More fundamentally, before committing significant time and resources to the development of a detailed model, it… more
Date: December 22, 2008
Creator: Hardy, B & Donald L. Anton, D
Partner: UNT Libraries Government Documents Department
open access

Development of the Instrumentation and Modeling for Heat Transfer Characteristics in CFBC

Description: This technical report summarizes the research conducted and results obtained during the period beginning October 1, 1999 to March 31, 2000. Heat transfer characteristics study and experimental work were continued using the bench-scale CFB system with the heat transfer probe. A copper tube with thermocouples was used as the heat transfer probe which was convenient to measure the temperature changes at different locations of the bed. The heat transfer coefficient at different locations of the hea… more
Date: March 29, 2000
Creator: Lee, Seong E.
Partner: UNT Libraries Government Documents Department
open access

Die Casting Part Distortion: Prediction and Attenuation

Description: The goal of this research was to predict the part deformation and residual stresses after ejection from the die and cooling to room temperature. A finite element model was built to achieve this goal and several modeling techniques were investigated throughout this research. Die-casting is a very complex process and the researchers are faced with a large number of hard to solve physical problems when modeling the process. Several assumptions are made in our simulation model. The first significan… more
Date: February 12, 2002
Creator: Dr, R. Allen Miller
Partner: UNT Libraries Government Documents Department
open access

Growth curve analysis for plasma profiles using smoothing splines. Final report, January 1993--January 1995

Description: In this project, we parameterize the shape and magnitude of the temperature and density profiles on JET and the temperature profiles on TFTR. The key control variables for the profiles were tabulated and the response functions were estimated. A sophisticated statistical analysis code was developed to fit the plasma profiles. Our analysis indicate that the JET density shape depends primarily on {bar n}/B{sub t} for Ohmic heating, {bar n} for L-mode and I{sub p} for H-mode. The temperature profil… more
Date: July 1, 1995
Creator: Imre, K.
Partner: UNT Libraries Government Documents Department
open access

COMBUSTION TURBINE (CT) HOT SECTION COATING LIFE MANAGEMENT

Description: The integrity of coatings used in hot section components of combustion turbines is crucial to the reliability of the buckets. This project was initiated in recognition of the need for predicting the life of coatings analytically, and non-destructively; correspondingly, four principal tasks were established. Task 1, with the objective of analytically developing stress, strain and temperature distributions in the bucket and thereby predicting thermal fatigue (TMF) damage for various operating con… more
Date: March 31, 2006
Creator: Gandy, D.; Viswanathan, R.; Cheruvu, S. & Krzywosz, K.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen