Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Michael Hölling"'
Autor:
Piyush Singh, Florian Schmidt, Jochen Wild, Johannes Riemenschneider, Joachim Peinke, Michael Hölling
Publikováno v:
Aerospace, Vol 11, Iss 5, p 353 (2024)
This article presents an experimental investigation of a passive-adaptive slat concept, an aerodynamic control mechanism aimed at avoiding separation in the inwards region of a horizontal axis wind turbine blade. The passive-adaptive slat is designed
Externí odkaz:
https://doaj.org/article/81d342eb05f94e33bd9c71eca82f2842
Publikováno v:
Energies, Vol 15, Iss 22, p 8607 (2022)
We propose an experimental study on the influence of the tip speed ratio on the spatial development of a wind turbine wake. To accomplish this, a scaled wind turbine is tested in a wind tunnel, and its turbulent wake measured for streamwise distances
Externí odkaz:
https://doaj.org/article/4297f4fe133b49789b404d792f5dce7c
Publikováno v:
Energies, Vol 13, Iss 20, p 5392 (2020)
Wind turbines are usually clustered in wind farms which causes the downstream turbines to operate in the turbulent wakes of upstream turbines. As turbulence is directly related to increased fatigue loads, knowledge of the turbulence in the wake and i
Externí odkaz:
https://doaj.org/article/21df4e6e4efb488b881d243978ce8470
Autor:
Stanislav Rockel, Elizabeth Camp, Jonas Schmidt, Joachim Peinke, Raúl Bayoán Cal, Michael Hölling
Publikováno v:
Energies, Vol 7, Iss 4, Pp 1954-1985 (2014)
Wind tunnel experiments were performed, where the development of the wake of a model wind turbine was measured using stereo Particle Image Velocimetry to observe the influence of platform pitch motion. The wakes of a classical bottom fixed turbine an
Externí odkaz:
https://doaj.org/article/a8b78aa89d3a4b31895ce9d29f9cf1ef
Autor:
Michael Sinner, Michael Hölling, Lucy Y. Pao, Vlaho Petrović, Lars Neuhaus, Apostolos Langidis, Martin Kühn
Publikováno v:
IEEE Transactions on Control Systems Technology. 30:583-597
Model predictive control (MPC) is a control method that involves determining the input to a dynamical system as the solution to an optimization problem that is solved online. In the wind turbine research literature, MPC has received considerable atte
Publikováno v:
Renewable Energy. 179:1650-1662
Knowledge of the turbulence in the wakes of wind turbines is important to improve the operation and lifetime of downstream turbines exposed to these wakes. As the investigation of a rotating turbine can be challenging, both experimentally and numeric
Publikováno v:
Energies; Volume 15; Issue 22; Pages: 8607
We propose an experimental study on the influence of the tip speed ratio on the spatial development of a wind turbine wake. To accomplish this, a scaled wind turbine is tested in a wind tunnel, and its turbulent wake measured for streamwise distances
As wind energy expands worldwide, the demand of reliable, fast, cost-efficient wind turbine wake models is growing. This is a significant challenge as wind turbines face various inflow conditions, that include turbulence, inhomogeneities/instationari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa53d268cd33da4223f8f7819acc2cc5
http://arxiv.org/abs/2209.04935
http://arxiv.org/abs/2209.04935
Publikováno v:
Wind Energy Science, 7(5). Copernicus Publications
The dynamic inflow effect describes the unsteady aerodynamic response to fast changes in rotor loading, due to the inertia of the wake. For pitch actuation and fast rotor speed changes this effect leads to load overshoots. The effect is suspected to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4bbb4a187ea852e06feaded3bc791b2
https://research.hanze.nl/en/publications/5aa6a78d-da3e-412d-acc0-a34657b9d16f
https://research.hanze.nl/en/publications/5aa6a78d-da3e-412d-acc0-a34657b9d16f
Autor:
Michael Hölling, Anantha Padmanabhan Kidambi Sekar, Lars Neuhaus, Marijn Floris van Dooren, Torben Mikkelsen, Martin Kühn
Publikováno v:
van Dooren, M F, Sekar, A P K, Neuhaus, L, Mikkelsen, T, Hoelling, M & Kuehn, M 2022, ' Modelling the spectral shape of continuous-wave lidar measurements in a turbulent wind tunnel ', Atmospheric Measurement Techniques, vol. 15, no. 5, pp. 1355-1372 . https://doi.org/10.5194/amt-15-1355-2022
This paper describes the development of a theoretical model for the turbulence spectrum measured by a short-range, continuous-wave lidar (light detection and ranging). The lidar performance was assessed by measurements conducted with two WindScanners
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f068e9e644448df77b6fa4192eba6c7f
https://doi.org/10.5194/amt-2021-233
https://doi.org/10.5194/amt-2021-233