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JAXA-ONERA-DLR COOPERATION: Results from Rotor Optimization in Forward Flight

Kimur, Keita and Wilke, Gunther Andreas and Bailly, Joëlle and Tanabe, Yasutada (2022) JAXA-ONERA-DLR COOPERATION: Results from Rotor Optimization in Forward Flight. In: 48th European Rotorcraft Forum. 48th European Rotorcraft Forum, 06-09 Sep 2022, Winterthur, Switzerland.

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Abstract

This paper presents the results of a cooperative study by JAXA, DLR, and ONERA on the optimal design of helicopter blades for high-speed forward flight. Optimizations and simulations are carried out by each agency with their own analysis codes using both blade element theory-based methods and computational fluid dynamics. These results are cross-compared and show common trends identified for optimum rotor blades obtained by each agency and the mechanism for improving forward flight performance are discussed. From the effective drag distributions, it is confirmed that, in order to improve forward flight performance, it is first important to reduce drag on the advancing side, and that a blade with a relatively small twist angle and planforms with a smaller chord length at the root and tip compared to the mid-span section is generally a suitable blade.

Item URL in elib:https://elib.dlr.de/188312/
Document Type:Conference or Workshop Item (Lecture)
Additional Information:JOD-ROC
Title:JAXA-ONERA-DLR COOPERATION: Results from Rotor Optimization in Forward Flight
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kimur, KeitaJaxahttps://orcid.org/0000-0002-6327-045X
Wilke, Gunther AndreasGunther.Wilke (at) dlr.dehttps://orcid.org/0000-0002-1915-5307
Bailly, Joëllejoelle.zibi (at) onera.frhttps://orcid.org/0000-0002-6389-6276
Tanabe, YasutadaJaxahttps://orcid.org/0000-0002-3840-9026
Date:9 September 2022
Journal or Publication Title:48th European Rotorcraft Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:HARTII, rotor blade optimization, CFD comparison, forward filght
Event Title:48th European Rotorcraft Forum
Event Location:Winterthur, Switzerland
Event Type:international Conference
Event Dates:06-09 Sep 2022
Organizer:ZHAW
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:04 Nov 2022 09:27
Last Modified:04 Nov 2022 09:27

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