Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 175 for “"temperature rise"”.
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Temperature rise of the workpiece in metal cutting
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1957.
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A new model of moisture evaporation in composite materials in rapid temperature rise environments
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Microprocessor based protection of induction motors using thermal, mechanical, and skin effect electrical models to predict motor temperature rise
… loading, and overloading conditions. Motor temperature at critical points is estimated. A microprocessor protection scheme based on motor temperature is proposed. Previous studies assume a linear relationship between motor impedance and frequency when calculating motor temperature. In this …
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The Effects of Melt-Crystal Interface Temperature Rise on The Analysis of Crystal Growth in Binary Borate Glass Melts
Made available in DSpace on 2014-12-14T15:24:02Z (GMT). No. of bitstreams: 1 7811250.pdf: 4798459 bytes, checksum: 9e5d39ed5a1edc6ad7ca6859d364b957 (MD5) Previous issue date: 1978
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The effect of process conditions, time, temperature, and rates of temperature rise, on the exhaustion of disperse dye on polyester yarn under high-temperature dyeing conditions
The effect of process conditions, temperature, time and rate of temperature rise, on the exhaustion of disperse dye on polyester yarn under High-Temperature dyeing conditions was investigated. Two ply spun type Dacron 54 polyester yarn was dyed with Disperse Red 60 in 0.5 g/l dye bath concentration …
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A multistage-constant-current, temperature-controlled, health-conscious fast charging algorithm for lithium-ion batteries
… and cycle life of the battery due to excessive temperature rise resulting in accelerated degradation of the battery chemistry. Especially in subzero conditions, the chemical reactions are much slower, resulting in increased internal impedance. This leads to a higher rate of temperature rise in …
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Thermal analysis of sliding contact systems using the boundary element method
… heat and the ensuing surface or subsurface temperature rise caused by frictional heating between sliding solids. The theoretical model consists of two semi-infinite substrates each coated with a film of arbitrary thickness and thermal properties. A three dimensional transient analysis is …
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Development of an Absorbing Radio Frequency Shield for Safe Magnetic Resonance Imaging
… function method used to evaluate RF-induced temperature rise at a DBS lead tip, including both theory and measurements. Next, an ARFS shell is designed for a generic head-trunk human model for basic electromagnetic full-wave and thermal validations. A multi-layered ARFS shell structure is …
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The effect of loading frequency and loading level on the fatigue behavior of angle-ply carbon/PEEK thermoplastic composites
… load, axial strain, and the sample's surface temperature were recorded through a data acquisition system. It was found that the fatigue life of this material decreases as loading frequency increases. At the same frequency, the fatigue life decreases as the loading level increases, with more …
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Pneumatic Tire Performance on Ice
… tire-ice model (TIM). The model computes the temperature rise in the contact patch based on the pressure distribution in the contact patch, thermal properties of the tread compound and of the ice surface. The contact patch is then classified into wet and dry regions based on the ice surface …
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Infrared measurements of steady-state temperatures and average surface temperature distributions for silver sliding on sapphire
Surface temperatures generated by dry sliding friction were measured with the use of an infrared radiometric microscope system developed at Virginia Polytechnic Institute and State University. Silver was used as the test material because of its resistance to oxide formation. The effects of load, …
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Evaluation of a Strut-Plasma Torch Combination as a Supersonic Igniter-Flameholder
… supersonic wind tunnel at Mach 2.4. Pressure and temperature sampling, filtered photography, and spectroscopic measurements were used to compare different test cases. These results provide both qualitative and quantitative results on how the combination responds to changes in the mass flow rate of …
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Artificial curing of mechanically harvested Virginia-type peanuts
… heat which was designed to give the prescribed temperature rise when the ambient relative humidity was above 75 percent. The drying potential ranged from 12 cfm/ft³ and a 10 F temperature rise to 9 cfm/ft³ and a 3 F temperature rise. Original moisture contents of the peanuts tested were 43 …
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Theoretical study of heat distribution and surface temperatures generated in oscillating contact
… distribution of frictional heat and resulting temperature rise for simple systems with sliding contact. The solution method developed is a variation of the boundary integral equation method (BIEM) in which a moving, full-space Green's function is used as the fundamental solution. The numerical …
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Fabrication of a nanoporous membrane device for high heat flux evaporative cooling
… 412 W/cm2, over an area of O.4x 5 mm, and with a temperature rise of 24.1 K from the heated substrate to ambient vapor, were obtained. These results are in good agreement with a high-fidelity, coupled fluid convection and solid conduction compact model, which was necessitated by computational …
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Modeling, analysis, and design of high-frequency high-density low-profile power transformers
… transformer 1-D winding loss, core loss and temperature rise models are derived in terms of the transformer geometry parameters. A 2-D FEA (Finite Element Analysis) is used to visualize the high frequency electromagnetic field and current density distribution, and to quantify high frequency …
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Dynamic electromechanical measurements of carbon black loaded SBR
… loss modulus and phase angle measurements, temperature rise measurement during stress cycling, and dynamic conductivity measurement. It is established that there are three distinct conduction regimes existing at carbon black loadings below, at, and above the percolation threshold. …
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Development of a generalised kinetic model for the combustion of hydrocarbon fuels
… for the combustion of hydrocarbons. Predicted temperature-time profiles can be obtained from detailed combustion kinetics, which can be used to derive a generalised model. If the generalised model can predict results from the detailed model it can be applied in computational fluid dynamics code …
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Diffusion of Three-Dimensional Slot Jets With Deep and Shallow Submergence
… between the jet and the receiving water gives rise to strong shearing action generating turbulence, which diffuses the heated water into the colder water keeping the temperature rise within acceptable limits.
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The six phase rectifier as a power source for operating DC motors
… was unaffected by rectifier operation, The temperature rise with rectifier operation was roughly within 5°C of that obtained with DC generator input, The commutation was not adversely affected when using the rectifier, These statements apply even when the rectifier is operated at half …
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