Volume 17 (2023)


Recent Submissions

Zeise, Pascal , Schweizer, Bernhard
Numerical investigations on high-speed turbo-compressor rotor systems with air ring bearings: Nonlinear vibration behavior and optimization

Regarding aerodynamic bearings, mainly two basic types can be distinguished: air bearings with a rigid housing and air foil bearings with an elastic supporting structure. Here, a modified bearing concept – called air ring bearing – is investigated, which may be considered as...

Franz, Daniel , Schüßler, Benedikt , Rinderknecht, Stephan
Adapting the control of the magnetic bearings of a highly flexible and gyroscopic rotor to the excitations by the motor

A test rig was built to perform fatigue tests on thick-walled cylinders made of fibre reinforced plastic (FRP). During the fatigue test, the rotational speed of an FRP cylinder is periodically varied until it fails. The FRP cylinder is connected to a drive spindle that ac...

Kovář, Patrik , Fürst, Jiří
Compressor cascade correlations modelling at design points using artificial neural networks

In recent years, the flow analysis by means of computational fluid dynamics (CFD) has become a useful design and optimization tool. Unfortunately, despite advances in the computational power, numerical simulations are still very time consuming. Thus, empirical correlation models keep their i...

Dhiman, Joginder Singh , Sood, Sumixal
Oscillatory convection in viscoelastic ferrofluid layer: Linear and non-linear stability analyses

The problem of ferroconvection in a viscoelastic fluid layer is studied with the aim to investigate oscillatory mo tions. In this article, a stability analysis for both linear and nonlinear systems is carried out. In the linear stability analysis, the expressions for steady a...

Sidharth, Dave , Neufond, Jessica , Nordmann, Rainer , Rinderknecht, Stephan
A fundamental investigation of the interaction and impact of controlled torque ripples on gear mesh dynamics

Gear trains are plagued by self-excited vibrations that are concentrated at the mesh frequency and its harmonics due to their varying mesh stiffness and deviations from the ideal involute profile. This is even more pronounced in spur gears due to their lower contact rat...