Sökning: "trapezoidal"
Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet trapezoidal.
1. Investigation of Some Heat Transfer Surfaces for Gas Turbine Recuperators
Sammanfattning : A part of this thesis has been devoted to present general recuperator technology such as available gas turbine recuperator types, applications where recuperators are utilized, recuperator materials etc. An investigation of some compact and highly efficient heat transfer surfaces, for intended use in gas turbine recuperators, include the following surfaces: · Cross Wavy (CW) primary surface. LÄS MER
2. Load-Carrying Capacity of Steel Girders and Panels with Thin-Walled Trapezoidally Corrugated Webs
Sammanfattning : This thesis concerns the load-carrying capacity of steel girders and panels with thin-walled trapezoidally corrugated webs. Computer-based numerical methods are used as a tool and emphasis is placed on various parametric studies, covering geometric parameters, initial imperfections, material strain-hardening models, loading types and loading positions, and so forth. LÄS MER
3. High order trapezoidal rule-based quadratures for boundary integral methods on non-parametrized surfaces
Sammanfattning : This thesis is concerned with computational methods for solving boundary integral equations (BIE) on surfaces defined without explicit parametrization, called Implicit Boundary Integral Methods (IBIM). Using implicit methods for describing surfaces, such as the level-set method, can be advantageous for complex geometries and problems where the surface evolves over time. LÄS MER
4. Partial Discharge Analysis of Stator Insulation at Arbitrary Voltage Waveform Stimulus
Sammanfattning : Partial discharge (PD) detection is a powerful tool to diagnose the defects and degradation in high voltage electrical insulation systems. It can be performed in both on-line and off-line conditions. LÄS MER
5. Towards an on-chip power supply: Integration of micro energy harvesting and storage techniques for wireless sensor networks
Sammanfattning : The lifetime of a power supply in a sensor node of a wireless sensor network is the decisive factor in the longevity of the system. Traditional Li-ion batteries cannot fulfill the demands of sensor networks that require a long operational duration. LÄS MER