Dynamic Wind Speed in Dynamic Inflow Models

Master thesis (2018)

Authors

W.E. van der Deijl Aerospace Engineering

Contributors

Carlos Ferreira (mentor)
T.J. Berdowski (mentor)
M B Zaaijer (graduation committee member)
A.H. van Zuijlen (graduation committee member)
J.G. Schepers (graduation committee member)
Faculty
Aerospace Engineering, Aerospace Engineering
Copyright: © 2018 Wessel van der Deijl
More Info
expand_more

Published Date

11-07-2018

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Aerospace Engineering

Abstract

In the case of unsteady loading conditions at a rotor, the induced velocity response lags the thrust coefficient at the rotor. The two parameters that are responsible for unsteady loading conditions are rotor thrust (due to blade pitch, or rotational speed) and incoming wind speed. The induced velocity response to these two sources of unsteadiness have been compared in a free wake vortex ring model. It was found that a varying wind speed has a non-negligible dynamic inflow effect, and the effect is different from varying rotor thrust. Additionally, current engineering models are incapable of capturing this difference. Recently a new engineering model was proposed at the TU Delft by Wei Yu, and this model is extended such that it is able to distinguish between the response to dynamic wind and to dynamic thrust.

Files

Report_Final.pdf
(.pdf | 10.7 Mb)