elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Successive Optimization of Airfoils, Planform and Twist for Aerodynamic Performance of Helicopter Rotor Blades

Wilke, Gunther Andreas (2023) Successive Optimization of Airfoils, Planform and Twist for Aerodynamic Performance of Helicopter Rotor Blades. In: 79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023. Vertical Flight Society’s 79th Annual Forum & Technology Display, 16-18 May 2023, West palm Beach, Florida. ISBN 978-171387479-9.

[img] PDF - Only accessible within DLR
737kB
[img] PDF
4MB

Abstract

The design of new helicopter rotor blades is a challenging task. The individual blade sections undergo very different flow conditions during the various flight regimes of the helicopter. In forward flight, the advancing side operates in a transonic regime where potentially shock waves can occur, while on the retreating side little flow velocities at high angle of attacks are seen up to reverse flow. In hover, the oncoming tip vortex of the previous blade drastically influences the inflow on the rotor. This paper joins the classical blade shape design with numerical optimization techniques. Opposing to the direct solution process of directly modifying the blade shape, the rotor blade is conventionally considered as a set of airfoils, a planform and a twist distribution. First, rotor airfoils are found through numerical optimization and then placed on the reference rotor. The planform & twist of this rotor are then also numerical optimized. The obtained trade-off blade for hover and forward flight drastically improved the performance over the reference HART-II blade (11% in forward flight, 5% in hover flight). In order to arrive at industrial relevant blades, further work including more disciplines becomes necessary.

Item URL in elib:https://elib.dlr.de/197281/
Document Type:Conference or Workshop Item (Speech)
Title:Successive Optimization of Airfoils, Planform and Twist for Aerodynamic Performance of Helicopter Rotor Blades
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wilke, Gunther AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-1915-5307145327868
Date:May 2023
Journal or Publication Title:79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
ISBN:978-171387479-9
Status:Published
Keywords:robust airfoil design, planform & twist, NACA23012, HART-II, OA209, multi-objective surrogate-based optimization
Event Title:Vertical Flight Society’s 79th Annual Forum & Technology Display
Event Location:West palm Beach, Florida
Event Type:international Conference
Event Dates:16-18 May 2023
Organizer:Vertical Flight Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Rotorcraft and Validation
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Deposited By: Wilke, Gunther Andreas
Deposited On:26 Oct 2023 11:28
Last Modified:26 Oct 2023 11:28

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.