...Grant Ingram This paper outlines the update of a turbomachinery course to cover three-dimensional (3D) aerodynamics using a Reynolds-Averaged Navier Stokes solver. Prior to the activities outlined in this paper, the course was taught in a conventional way with a series of lectures and a timed...

... is maximal here. The detailed derivation can be found in Ref. [ 10 ]. Normalized to the mass flow, the fundamental Euler turbomachinery equation is obtained (10) P m ˙ =   Δ h is = u 2 · c u 2 −   u 1 · c u 1 The operating principle...

...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...

...@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-Gesellschaft 10.13039/501100003185 Fraunhofer Lighthouse...

... 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...

... University of Technology and the Institute of Turbomachinery and Fluid Dynamics (TFD) at Leibniz University Hannover. The FVV (Research Association for Combustion Engines eV) fully financed the project and an expert group under the direction of Dipl.-Ing. Uwe Tomm gave their extensive technical support...

...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...

... 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 operation for optimizing...

... ability. 08 04 2011 21 04 2011 29 08 2011 29 08 2011 electric machines rotors turbomachinery Fluid film bearings supporting rotating machinery, as well as seals, affect the rotor-bearing system (RBS) static and dynamic forced response. A bearing reacts to rotor...

...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...

... 03 05 2011 stochastic programming thermodynamics turbomachinery two-phase flow Positive displacement expanders acquired popularity as prime movers for micropower generation systems that are usually based on the organic Rankine cycle (ORC) as pointed out by Mathias et at ( 1...

... regenerative braking rotors turbomachinery regenerative pump momentum exchange one-dimensional Existing numerical models are limited in representing the complex flow field within the pump and require significant experimental correction ( 6 ). This paper considers the performance of the pump...

... coefficients and within 30% for the direct damping coefficients. 09 05 2010 31 07 2010 19 04 2011 19 04 2011 lubrication machine bearings machine testing rotors turbomachinery Tilting pad journal bearings (TPJBs) are widely used in the turbomachinery industry to help...