An influence of the different incoming wake-like flows on the rotor vibrations: Paper

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

151 Downloads (Pure)

Abstract

The aim of the current investigation is the rotor vibrations generated by the disturbances caused the different types of incoming wake-like flows. Those wakes arriving at the tested rotor were created by two ways: a passive wake generator (immobile disk) and an upstream rotating rotor as an active wake generator. The influence of both wakes on the tested rotor was studied in a water flume. A model of the tested three-bladed rotor designed using Glauert’s optimum theory at an optimal tip speed ratio λ = 5 was placed in both “passive” and “active” wakes to recognize dissimilarities on the vibrations of the tested rotor. The distance from the wake generators to the tested rotor was varied from 4 to 8 rotor diameters. Also, the shift between the rotor axis and axis of the incoming wakes was changed to 0, 0.5 and 1 rotor diameters. The flow condition before rotor was measured with high temporal accuracy using LDA. The turbulent intensity of the incoming wake flows changed from 3 to 16% due to the types of the wake generators. Power and thrust characteristics and their pulsations of the tested rotor were measured by strain gauges. The dependences of power coefficients from tip speed ratios and positions of the wake generators were documented. The present study showed a strong influence of the initial flow from the two different wake generators on the rotor vibrations.
Original languageEnglish
Title of host publicationWake Conference 2017
Number of pages9
Volume854
PublisherIOP Publishing
Publication date2017
Article number012034
DOIs
Publication statusPublished - 2017
EventWake Conference 2017 - Visby, Sweden
Duration: 30 May 20171 Jun 2017
http://standupforwind.se/wake-conference-2017/

Conference

ConferenceWake Conference 2017
CountrySweden
CityVisby
Period30/05/201701/06/2017
Internet address
SeriesJournal of Physics: Conference Series
ISSN1742-6596

Cite this

Naumov, I. V., Kabardin, I. K., Mikkelsen, R. F., Okulov, V., & Sørensen, J. N. (2017). An influence of the different incoming wake-like flows on the rotor vibrations: Paper. In Wake Conference 2017 (Vol. 854). [012034] IOP Publishing. Journal of Physics: Conference Series https://doi.org/10.1088/1742-6596/854/1/012034