... e-mail:  kentschke@tfd.uni-hannover.de e-mail:  seume@tfd.uni-hannover.de 04 08 2022 18 08 2022 07 10 2022 fuel cell applications hydrogen turbomachinery droplet Bundesministerium für Wirtschaft und Energie 10.13039/501100006360 ZF4842901BR9...

...Markus Landwehr; Philipp Ganser; Georg Vinogradov; Thomas Bergs The manufacturing process of blade-integrated disks (blisks) represents one of the most challenging tasks in turbomachinery manufacturing. The requirement is to machine complex, thin-walled blade geometries with high aspect ratios made...

...-mail:  sebastian.mayer@scai.fraunhofer.de e-mail:  thomas.bergs@ipt.fraunhofer.de 20 07 2021 21 07 2021 20 10 2021 milling blisk CAD CAM CAE digital twin digital environment exploration facilitated variation manufacturing variations modeling turbomachinery Fraunhofer...

... cycle calculations to be performed without requiring turbomachinery performance maps. In contrast, traditional off-design cycle analyses require either scaling, calculating, or measuring compressor and turbine maps with boundary condition assumptions. In addition, the CFD simulations and the cycle...

... 24 02 2021 turbomachinery thermophysical CFD CHT experimental temperature heat transfer Today, turbocharging is a key technology in the development of efficient internal combustion engines. The goals are to increase the effective power output through higher mean pressure...

...Stefano Bianchi; Alessandro Corsini; Luca Mazzucco; Lucilla Monteleone; Anthony G. Sheard Obtaining the right pitch in turbomachinery blading is crucial to efficient and successful operations. Engineers adjust the rotor’s pitch angle to control the production or absorption of power. Even for low...

... computational fluid dynamics erosion finite element analysis turbomachinery Erosion affects axial and centrifugal fans in power plant boiler induced-draft systems. Particle laden flows characterize the operating environment as a consequence of the transport of solid or molten particles. This results...

...Loïc Salles; Laurent Blanc; Fabrice Thouverez; Alexander M. Gouskov; Pierrick Jean Contact interfaces with dry friction are frequently used in turbomachinery. Dry friction damping produced by the sliding surfaces of these interfaces reduces the amplitude of bladed-disk vibration. The relative...

...Daejong Kim; George Zimbru Air/gas foil bearings (AFB) have shown a promise in high-speed micro to mid-sized turbomachinery. Compared to rolling element bearings, AFBs do not require oil lubrication circuits and seals, allowing the system to be less complicated and more environment-friendly. Due...

...Tae Ho Kim; Jin Woo Song; Yong-Bok Lee; Kyuho Sim Identifying thermal characteristics of gas foil bearings (GFBs) provides an insight for successful implementation into high speed oil-free turbomachinery. The paper presents temperature measurements of a bump type GFB floating on a hollow shaft...

...Fabrice Giuliani; Andreas Lang; Klaus Johannes Gradl; Peter Siebenhofer; Johannes Fritzer A specific actuator able to modulate the air feed of a gas a burner at a given frequency and amplitude is presented. The Combustion Department at the Institute for Thermal Turbomachinery and Machine Dynamics...

...Tae Ho Kim; Yong-Bok Lee; Tae Young Kim; Kyong Ho Jeong Engineered design of modern efficient turbomachinery based on accurate model predictions is of importance as operating speed and rate power increase. Industrial applications use hydrodynamic fluid film bearings as rotor support elements due...

... micrometry rotors turbomachinery vibrations In order to improve safety, lifetime and energy efficiency of turbo machines, in particular the dynamic behavior of the rotor has to be analyzed and optimized. Thus, rotor unbalances, dynamic deformations and blade vibrations have to be monitored during...

... as that in an earlier MMFB of similar size though with a thicker mesh [( 1 3 )]. The current bearing has a thinner metal mesh ring and demonstrates its superior ability to dissipate mechanical energy. That is, it provides adequate damping as required for moderate load turbomachinery applications. The support...

...Luis San Andrés; Thomas Abraham Chirathadam Metal mesh foil bearings (MMFBs) are inexpensive compliant gas bearing type that aim to enable high speed, high temperature operation of small turbomachinery. A MMFB with an inner diameter of 28.00 mm and length of 28.05 mm is constructed with low cost...

... this measurement by developing a patented, high-frequency, high-amplitude shaker system, resulting in excitation over most of the subsynchronous range. 10 05 2010 09 08 2010 06 05 2011 06 05 2011 damping design engineering machine bearings mechanical testing rotors turbomachinery...

... of the presented approach, and comments are given on how various operating parameters affect system performance in the limaçon design. 29 08 2010 22 11 2010 03 05 2011 03 05 2011 stochastic programming thermodynamics turbomachinery two-phase flow Positive displacement...

... momentum exchange one-dimensional pumps regenerative braking rotors turbomachinery 21 07 2010 20 09 2010 20 04 2011 20 04 2011 Pump characteristic head and flow coefficients can be calculated as expressed in conventional dimensionless terms: 17 ψ = g H ω...

... and Expander-Compressors for Petroleum, Chemical and Gas Industry Services ,” API 617 , 7th ed. , American Petroleum Institute , Washington, DC . 09 05 2010 31 07 2010 19 04 2011 19 04 2011 lubrication machine bearings machine testing rotors turbomachinery...

... of applications such as laptops, small tools, etc. But microscale gas turbines could not only be used for generating electricity, they could also produce thrust for powering small unmanned aerial vehicles or similar devices. Beneath all the great design challenges with the rotating parts of the turbomachinery...