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.
Results
Showing 1 to 10 of 10 for “"Thermal transient"”.
-
Investigation of the Topaz-II space nuclear reactor moderator thermal transient
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
-
Thermal transient computation for a CTR blanket following a major plasma disruption
This study concerns a neutronic and transient thermal study of the first wall and blanket region of a typical controlled thermonuclear reactor (CTR). Previous studies assumed a neutron wall loading of 1 ~ 5 MW/m², and usually an infinite slab for a blanket region in calculating the transient …
-
4H silicon carbide particle detectors: study of the defects induced by high energy neutron irradiation
… clarify the defect kinetic it were carried out a thermal transient spectroscopy (DLTS and PICTS) analysis of different samples irradiated at increasing fluences. The defect evolution was correlated with the transport properties of the irradiated detector, always comparing with the un-irradiated …
-
Application of hybrid Computational Fluid Dynamics turbulence model, STRUCT-[epsilon], on heated flow cases
… to characterize fluid flow, pressure drop, and thermal transient behavior in complex flow geometries. However, with current CFD simulation techniques, the accurate modeling of turbulence structures is often prohibitively expensive or time-intensive. Therefore, a new hybrid turbulence model, …
-
Cold-start effects on performance and efficiency for vehicle fuel cell systems
… this work addresses issues of the initial thermal transient known to the automotive community as "cold-start" effects. Cold-start effects play a significant role in power limitations in a fuel cell vehicle, and may require hybridization (batteries) to supplement available power. A fuel cell …
-
Evaluation of ceramic candle filters degradation and damage location using four-point bending tests
… due to persistent high temperature operation, thermal transient events, excessive ash accumulation and bridging, and pulse cleaning. This study proposes a nondestructive evaluation of the structural properties of these ceramic filters. The ceramic candle filter is a slender structure made of …
-
Electrothermomechanical Modeling of a Surface-micromachined Linear Displacement Microactuator
… Using finite-difference techniques, an electrothermal model based on the balance of heat dissipation and heat losses is developed. For accurate simulation, the relevant temperature dependent properties from the microactuator material are included in the model. The electrothermal model …
-
Analysis of damage mechanisms in boronized TZM tiles from Alcator C-Mod fusion reactor operations
… fluxes at the tile surface, along with the thermal transient history of the tiles, to estimate the depth of damage from each of these sources. These results were compared to data gathered during analysis of the tiles through several techniques, including ion beam analysis, scanning electron …
-
Substrate-dependent high-field transport and self-heating in graphene transistors
… the substrate dependence of the electrical and thermal transport in graphene field-effect transistors (GFETs). We developed a simple yet practical electro-thermal model along with extensive calibration with experimental data. Special emphasis is given to the study of high-field transport and …
-
Linear-time 3-D thermal methods for transient electro-thermal simulations
… reliabilities. To achieve both, an electro-thermal simulator is needed as the thermal aspect of a device, such as the temperature, can play a big role on its reliability. By doing just the electrical simulation, an engineer cannot possibly determine the temperature of operation, and thus …