34 citations · 46 across the 6 of their papers we have counts for
6 papers
Experimental and Computational Investigation of a Fractal Grid Wake
André Fuchs, Wided Medjroubi, Hannes Hochstein +2
Fractal grids generate turbulence by exciting many length scales of different sizes simultaneously rather than using the nonlinear cascade mechanism to obtain multi-scale structure…
Description of laminar-turbulent transition of an airfoil boundary layer measured by differential image thermography using directed percolation theory
Tom T. B. Wester, Joachim Peinke, Gerd Gülker
The study presented here addresses the challenging problem of laminar-turbulent flow transition in boundary layers. Directed percolation theory has emerged as a promising approach…
Hybrid time series from PIV for characterization of turbulent flow fields: ASTRA -- Approach using Spatially and Temporally Resolved Advection
Tom T. B. Wester, André Fuchs, Joachim Peinke +1
Particle Image Velocimetry (PIV) has become increasingly popular to study structures in turbulent flows. PIV allows direct extraction and investigation of spatial structures in the…
Taming chaos with active grids -- Reproducibility in turbulent wind tunnel experiments
Lars Kröger, Michael Hölling, Gerd Gülker +1
A wind tunnel experiment is shown to examine the reproducibility of generated wind fields in the laboratory utilizing an active grid. A motion protocol of the grid, designed to mim…
Data-driven repetitive control: Wind tunnel experiments under turbulent conditions
Joeri Frederik, Lars Kröger, Gert Gülker +1
A commonly applied method to reduce the cost of wind energy, is alleviating the periodic loads on turbine blades using Individual Pitch Control (IPC). In this paper, a data-driven…
Directed percolation in aerodynamics: resolving laminar separation bubble on airfoils
Dominik Traphan, Tom T. B. Wester, Gerd Gülker +2
In nature, phase transitions prevail amongst inherently different systems, while frequently showing a universal behavior at their critical point. As a fundamental phenomenon of flu…