Experimental Whirl Tower Tests Approaching and Surpassing Stall for a Variety of Tip Speeds and Rotor Blades

Matti Mitropoulos, Verena Heuschneider, Aaron Barth, Ilkay Yavrucuk

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This paper outlines the investigation into the effect of static stall onset in hover on the deformation of rotor blades, comparing the behaviour of a stiff blade featuring a NACA0012 aerofoil, rectangular planform and no taper, and a hingeless blade attachment; with a more flexible blade featuring a NACA23012 aerofoil, twist and taper, and a lead-lag hinge. The Munich Experimental Rotor Investigation Testbed (MERIT) at the Technical University of Munich (TUM) was operated in a two-blade configuration at a variety of rotational speeds and collective pitch angles, paired with a stereooptic high speed photogrammetry system. The post-processing methodology used to extract flap and torsional deformations despite the presence of a hinge is outlined, and it was shown that the hinge affected the onset of flow separation and subsequent deformations. A comprehensive set of experimental deformation data for a repeatable setup has been generated and published.

Original languageEnglish
Title of host publicationVertical Flight Society 80th Annual Forum and Technology Display
PublisherVertical Flight Society
ISBN (Electronic)9781713897941
StatePublished - 2024
Event80th Annual Vertical Flight Society Forum and Technology Display, FORUM 2024 - Montreal, Canada
Duration: 7 May 20249 May 2024

Publication series

NameVertical Flight Society 80th Annual Forum and Technology Display

Conference

Conference80th Annual Vertical Flight Society Forum and Technology Display, FORUM 2024
Country/TerritoryCanada
CityMontreal
Period7/05/249/05/24

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