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Investigation of Active Twist Rotor for Blade De-Icing

Schulz, Martin and Riemenschneider, Johannes and Palacios, Jose (2013) Investigation of Active Twist Rotor for Blade De-Icing. 69th American Helicopter Society Forum, 21. - 23. Mai 2013, Phoenix, USA.

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Active twist blades designed by DLR have integrated piezoelectric actuators to twist the blade. The blades are designed to introduce individual blade control (IBC) for helicopter noise and vibration reduction. This paper presents research efforts to investigate the capability of active twist for blade de-icing. Two active twist blades were tested in the Adverse Environment Rotor Test Stand (AERTS) at the Pennsylvania State University, where different icing conditions were adjusted. The electrical input power to the actuators was about 200 Watt for one blade (1.0 m of the blade is active). At temperatures warmer than -17°C, the active twist rotor blade, excited at its first torsional resonance, removed accreted ice of varying stagnation thickness, ranging from 3 mm to 8 mm. These cases were simulated with finite element methods to provide insight into the ice interface stresses and their origin. Based on the finite element simulation a new design for an active twist blade is proposed. The modeled configuration increases the ice interface transverse shear stresses, predicting to shed accreted ice layers with a thickness of less than 2 mm.

Item URL in elib:https://elib.dlr.de/88171/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of Active Twist Rotor for Blade De-Icing
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Palacios, JosePennsylvania State UniversityUNSPECIFIEDUNSPECIFIED
Date:May 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Active Twist Blade, Piezoelectric Actuators, Deicing, Resonance Excitation, Experimantel Investigation
Event Title:69th American Helicopter Society Forum
Event Location:Phoenix, USA
Event Type:international Conference
Event Dates:21. - 23. Mai 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Böhringer-Thelen, Isolde
Deposited On:17 Feb 2014 08:26
Last Modified:08 May 2014 23:31

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