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 9 of 9 for “"gasturbine"”.
-
Economic Analysis of 3D-Printed Ceramic Cores for GasTurbine Investment Castings
When manufacturing blades and vanes for gas turbine engines, internal cooling channels are formed by investment casting with sacrificial ceramic cores. The hot injection and pressing techniques traditionally used to manufacture ceramic cores have long lead times and high up-front costs, motivating …
-
Untersuchungen zur Freisetzung und Einbindung von Alkalimetallen bei der reduzierenden Druckwirbelschichtverbrennung
… and Potassium, can lead to severe damage of the gasturbine blading due to hot corrosion. The investigations described in this thesis were performed to determine the potential of alkalimetal reduction from hot gases by alumosilicate sorbents unter reducing atmospheres at 750 °C. Using a flow …
-
Strukturanalyse turbulenter Flammen mit Hilfe abbildender laserspektroskopischer Verfahren
… da z.B. thermoakustische Schwingungen in Gasturbinen zu verstärkter Materialbeanspruchung führen. Dies stellt auch im Bereich der Flugzeugturbinen eine erhebliche Gefahr dar. Numerische Simulationen erlauben, die Prozesse bei der Verbrennung besser zu verstehen, jedoch sind Direkte …
-
Effect of wall motion on a two-dimensional turbulent boundary layer
… stator and rotor blades for a single stage in a gasturbine engine. Mass transfer results on the suction surface of the blade suggest that the onset of the secondary flow region near the endwall moves upstream with the belt motion. This is probably due to the lifting of the passage vortex by the …
-
Anwendungsgrenzen von modernen Nickelbasis-Superlegierungen in effusionsgekühlten Bauteilen zukünftiger Gasturbinen
The deformation and damage behaviour of two nickel-base superalloys, CMSX-4 and SX CM186LC, have been investigated. Hot-tensile, tensile creep and low-cycle-fatigue tests have been performed on single crystal and directionally solidified variants at temperatures up to 1000°C to compare their …
-
Novel Conceptual Design And Anlysis Of Polymer Derived Ceramic Mems Sensors For Gas Turbine Environment
Technical challenges for developing micro sensors for Ultra High Temperature and turbine applications lie in that the sensors have to survive extremely harsh working conditions that exist when converting fuel to energy. These conditions include high temperatures (500-1500°C), elevated pressures …
-
High temperature corrosion in gas turbines : thermodynamic modelling and experimental results
The introduction of new materials as well as the improvements in fuel quality have raised a need for re-evaluation of the hot corrosion risk in industrial gas turbines. In this study, the risk of hot corrosion was determined using thermodynamic modelling for different impurity-contents and …
-
Einfluss der Bondcoatzusammensetzung und Herstellungsparameter auf die Lebensdauer von Wärmedämmschichten bei zyklischer Temperaturbelastung
In the present study the influence of the bond coat composition on the lifetime of thermal barrier coatings during thermal cycling was investigated. The knowledge, that the reactive elements (RE), which are essential for the improvement of the oxide scale adhesion, are “lost”, during the bond coat …