Browsing Fakultät für Physik (inkl. GAUSS) by Advisor & Referee "Dillmann, Andreas Prof. Dr. Dr."
Now showing items 1-14 of 14
-
Investigation of boundary layer transition at high Reynolds numbers using time-resolved temperature-sensitive paint
(2024-08-23)Understanding the fundamental principles of the processes that lead to laminar-turbulent transition on aerodynamic surfaces is of significant importance to correctly describe, model and perhaps ultimately influence the ... -
Experimental Investigation of Micrometric Droplets and Artificial Particles
(2022-04-28)Clouds and atmospheric particles (e.g. ice crystals, smoke, dust or pollen) heavily influence Earth's energy budget and contribute to the largest uncertainties in climate prediction models. Their treatment involves a huge ... -
Stoßinduzierte Strömungsablösung in transitionellen Grenzschichten
(2022-01-21)The effects of transitional shock-wave/boundary-layer interactions (SWBLI) on the induced heat loads and the development of the laminar-turbulent transition are the subject of this work. Experimental investigations were ... -
Understanding the brightness variations of Sun-like stars on timescales of stellar rotation
(2021-01-21)Solar brightness varies on timescales from minutes to decades. In particular, the observed photometric variability can directly relate to the rotation period. Our understanding of this link allows extrapolations from the ... -
Development of a time-resolved quantitative surface-temperature measurement technique and its application in short-duration wind tunnel testing
(2018-07-13)In this cumulative thesis, a time-resolved quantitative temperature-sensitive paint (TSP) measurement technique was developed and used to measure temperatures at subsonic and up to hypersonic flow velocities in two different ... -
Experimentelle Erfassung und Charakterisierung der dreidimensionalen großskaligen Strömungsstrukturen und -temperaturen in Rayleigh-Bénard-Konvektion
(2017-10-26)In this work the flow structures in Rayleigh-Benard-Convection (RBC) are experimentally studied. For this purpose, two cuboidal convection samples are designed and installed. Using water as working fluid, these two experiments ... -
Konzeption einer Messsonde zur quantitativen zeitaufgelösten Detektion von CNG im Motor mittels IR-Strahlung
(2017-10-18)Rising greenhouse gas emissions caused by the transport sector are one factor that contributes to global warming. Consequently, the EU has decided on new regulations concerning the emissions of automobiles and on the ... -
Experimentelle Untersuchungen von Fingerströmung und thermohalinen Treppen für instabile Auftriebsverhältnisse
(2016-04-19)Finger convection is observed experimentally in an electrodeposition cell in which a destabilizing gradient of copper ions is maintained against a stabilizing temperature gradient. This double-diffusive system shows finger ... -
Experimental investigation of coherent structures generated by active and passive separation control in turbulent backward-facing step flow
(2015-08-06)This dissertation presents the experimental investigation of coherent structures which were generated by active and passive separation control devices in a turbulent backward-facing step (BFS) flow. The Reynolds number was ... -
Experimental Acquisition and Characterisation of Large-Scale Flow Structures in Turbulent Mixed Convection
(2014-07-28)In this cumulative thesis, the superposition of shear flow and thermal convection, namely mixed convection, is investigated experimentally. The experiments were performed in a cuboidal sample with aspect ratios Gamma_xz = ... -
Boundary layers and wind in turbulent thermal convection
(2014-07-24)This cumulative thesis is based on seven publications and is devoted to the investigation of turbulent thermal convection by means of Direct Numerical Simulations (DNSs). Special focus is placed on the boundary layers and ... -
Spatial Scaling of Large-Scale Circulations and Heat Transport in Turbulent Mixed Convection
(2013-02-18)The present study reports an experimental investigation of the scaling of large-scale coherent structures, their dynamics and heat transport in turbulent mixed convection. Based on a concept of spatial scaling, mixed ... -
Dynamik und Bifurkationsverhalten eines getriebenen Oszillators mit frei aufliegender Dämpfermasse
(2011-06-22)A driven spring-mass system supplemented by a loosely mounted, freely sliding damper mass is investigated. This oscillator is a simple model of a damping principle applied to turbine blades ... -
Aerothermodynamische Untersuchung einer Wiedereintrittskonfiguration und ihrer Komponenten in einem impulsbetriebenen Hochenthalpie-Stoßkanal
(2008-05-30)During re-entry into the atmosphere of the earth at altitudes between 60 km to 80 km above ground, the kinetic energy of a re-entry vehicle is converted mostly into thermal energy of the ...