Auflistung nach Schlagwort "Turbines"

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  • Aerodynamical and Structural Analysis of Operationally Used Turbine Blades 
    Schwerdt, Lukas; Hauptmann, Thomas; Kunin, Artsem; Seume, Jörg R.; Wallaschek, Jörg; Wriggers, Peter; Panning-von Scheidt, Lars; Löhnert, Stefan (Amsterdam : Elsevier BV, 2017)
    This paper presents an integrated methodology for the analysis of operationally-used turbine blades, incorporating aerodynamic and multiple structural simulations. In jet engines, blade rubbing and erosion lead to deviations ...
  • Crack repair of single crystal turbine blades using laser cladding technology 
    Rottwinkel, Boris; Nölke, Christian; Kaierle, Stefan; Wesling, Volker (Amsterdam : Elsevier B.V., 2014)
    The formation of cracks in single crystal (SX) turbine blades is a common problem for aero-engines. To repair cracks, which are located under the tip-area, a new method is to clad with single-crystal-technology. This ...
  • Design and test of a 10kW ORC supersonic turbine generator 
    Seume, Jörg R.; Peters, M.; Kunte, H. (Bristol : Institute of Physics Publishing, 2017)
    Manufactures are searching for possibilities to increase the efficiency of combustion engines by using the remaining energy of the exhaust gas. One possibility to recover some of this thermal energy is an organic Rankine ...
  • Development of a compact low coherence interferometer based on GPGPU for fast microscopic surface measurement on turbine blades 
    Li, Yinan; Kästner, Markus; Reithmeier, Eduard (Bellingham, Wash. : SPIE, 2015)
    Vertical scanning interferometry (VSI) techniques are widely used to profile microscopic surface structures of industrial products. This paper introduces a high-precision fast optical measurement system with an optimized ...
  • Early assessment of defects and damage in jet engines 
    Adamczuk, Rafael R.; Seume, Jörg R. (Amsterdam : Elsevier, 2013)
    The jet engine maintenance process is complex, expensive and time-consuming. It often requires engine disassembly or boroscopic examinations. In order to accelerate the process and reduce the down time of an engine we ...
  • High order sensitivity analysis of a mistuned blisk including intentional mistuning 
    Pohle, Linus; Tatzko, Sebastian; Panning-von Scheidt, Lars; Wallaschek, Jörg (Warsaw : Polish Society of Theoretical and Allied Mechanics, 2017)
    Small deviations between turbine blades exist due to manufacturing tolerances or material inhomogeneities. This effect is called mistuning and usually causes increased vibration amplitudes and also a lower service life ...
  • Impact of turbocharger non-adiabatic operation on engine volumetric efficiency and turbo lag 
    Shaaban, S.; Seume, Jörg R. (New York, NY : Hindawi Publishing Corporation, 2012)
    Turbocharger performance significantly affects the thermodynamic properties of the working fluid at engine boundaries and hence engine performance. Heat transfer takes place under all circumstances during turbocharger ...
  • Importance of the vane exit Mach number on the axial clearance-related losses 
    Grönman, Aki; Biester, Marc H.-O.; Turunen-Saaresti, Teemu; Jaatinen-Värri, Ahti; Backman, Jari; Seume, Jörg R. (London : SAGE Publications Ltd., 2016)
    More efficient and physically smaller axial turbine designs are promoted to lower emissions and increase revenue. The physical size and the weight of the axial turbine can be minimised by adjusting the distance between ...
  • Modelling friction characteristics in turbine blade vibrations using a fourier series expansion of a real friction hysteresis 
    Hoffmann, Thomas; Panning-von Scheidt, Lars; Wallaschek, Jörg (London : Elsevier Ltd., 2017)
    A new contact model is proposed to simulate the forced response of a two degree of freedom mechanical model which resembles the simplest form of a friction damped turbine blade. The model scales a measured friction hysteresis ...
  • Recent progress in turbine blade and compressor blisk regeneration 
    Aschenbruck, Jens; Adamczuk, Rafael R.; Seume, Jörg R. (Amsterdam : Elsevier, 2014)
    The regeneration process of jet engines is a highly complex, expensive and time-consuming. Especially the regeneration of high pressure turbine blades and compressor blisks are at the border of what is technically feasible. ...
  • Reduction of Disassembly Forces for Detaching Components with Solidified Assembly Connections 
    Wolff, Julius; Yan, Miping; Schultz, Melf; Raatz, Annika (Amsterdam : Elsevier B.V., 2016)
    The disassembly of components with solidified assembly connections is often difficult to plan. A typical example can be found in the aviation industry, where turbine blades solidify in the turbine disc due to operational ...
  • Regeneration of High Pressure Turbine Blades. Development of a Hybrid Brazing and Aluminizing Process by Means of Thermal Spraying 
    Nicolaus, M.; Möhwald, K.; Maier, Hans Jürgen (Amsterdam : Elsevier BV, 2017)
    Besides welding, high temperature vacuum repair-brazing is already established for nickel-based alloy turbine blades in the aerospace and power plant industries. After the worn turbine blade has been decoated to its substrate ...
  • A study on electrofuels in aviation 
    Goldmann, Andreas; Sauter, Waldemar; Oettinger, Marcel; Kluge, Tim; Schröder, Uwe; Seume, Jörg R.; Friedrichs, Jens; Dinkelacker, Friedrich (Basel : MDPI AG, 2018)
    With the growth of aviation traffic and the demand for emission reduction, alternative fuels like the so-called electrofuels could comprise a sustainable solution. Electrofuels are understood as those that use renewable ...
  • Unsteady flow phenomena in turbine shroud cavities 
    Kluge, Tim; Lettmann, Iris; Oettinger, Marcel; Wein, Lars; Seume, Joerg ([Zug] : GPPS, 2021)
    This paper presents those flow parameters at which coherent structures appear in the blade tip cavities of shrouded turbine blades. To the authors’ knowledge, this is reported for the first time in the open literature. The ...