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DLR’s S4 Rotor Code Validation With HART II Data: The Baseline Case

van der Wall, Berend G. and Yin, Jianping (2007) DLR’s S4 Rotor Code Validation With HART II Data: The Baseline Case. International Forum on Rotorcraft Multidisciplinary Technology, 2007-10-15 - 2007-10-17, Seoul, Korea.

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S4 is the name of DLR’s high resolution rotor code for simulation of aerodynamics, dynamics, acoustics and flow field of isolated rotors like those being operated in the wind tunnel. In 2001, the HART II test was performed by DLR, ONERA, US Army AFDD, NASA Langley and DNW in the large low-speed facility (LLF) of the DNW. The test encompasses the Bo105 40% Mach scaled and dynamically scaled model rotor in descent flight condition creating a large amount of blade-vortex interaction (BVI) noise as the baseline (BL) case. Higher harmonic control (HHC) was applied at 3/rev with different phases for minimum noise radia-tion (MN) and for minimum vibration characteristics (MV). This paper addresses the S4 code validation using HART II data of blade motion, section air loads and acoustic radiation. Acoustic radiation is post-processed by DLR acoustic code APSIM using S4 unsteady airloads as input. It is found that even with such kind of comprehensive code qualitatively and quantitatively good results can be obtained for all these aspects, when appropriate engineering models are applied: unsteady aerodynamics, fully elastic blades and wake vortex system with prescribed geometry.

Item URL in elib:https://elib.dlr.de/49943/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:DLR’s S4 Rotor Code Validation With HART II Data: The Baseline Case
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:October 2007
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-5
Keywords:HART II, wind tunnel testing, code validation, unsteady air loads, blade dynamics, rotor acoustics
Event Title:International Forum on Rotorcraft Multidisciplinary Technology
Event Location:Seoul, Korea
Event Type:international Conference
Event Start Date:15 October 2007
Event End Date:17 October 2007
Organizer:AHS International and the Korean Society for Aeronautical and Space Sciences
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 Active Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:22 Oct 2007
Last Modified:24 Apr 2024 19:12

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