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Aerostructural investigation of shape adaptive rotor blading for the reduction of BLI induced losses in the distorted flow regimes of a transonic fan rotor

Seidler, Marcel and Voigt, Jonas and Montano Rejas, Zhuzhell and Friedrichs, Jens and Monner, Hans Peter and Riemenschneider, Johannes (2023) Aerostructural investigation of shape adaptive rotor blading for the reduction of BLI induced losses in the distorted flow regimes of a transonic fan rotor. In: 10th ECCOMAS Thematic Conference on Smart Structures and Materials. ECCOMAS PROCEEDIA. 10th ECCOMAS Thematic Conference on Smart Structures and Materials, 2023-07-03 - 2023-07-05, Patras, Griechenland. doi: 10.7712/150123.9790.444574.

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Official URL: https://www.smart2023.eu


Within the Cluster of Excellence for Sustainable and Energy-Efficient Aviation SE2A, a blended wing body aircraft is investigated to improve efficiency and carbon emissions of future air transport. By embedding the aircraft engines on the top rear fuselage, parts of the aircraft’s wing boundary layer are ingested, which has the potential to further improve the engine’s propulsion efficiency. Through the ingestion of low momentum fluid however, inflow distortion is induced and the fan rotor operates under increased flow incidence in the distorted flow regimes. To reduce the thereby arising efficiency and pressure ratio penalties in the aircraft engine, alternative design strategies for the fan stage are required. Within this investigation, an active shape morphing mechanism is introduced, which allows to temporarily adjust the fan blading when the fan rotor is exposed to distorted inflow conditions. By integrating piezoceramic actuators into the rotor blading, the blade staggering and turning can be adjusted with the goal to reduce flow incidence and deviation in the distorted flow regimes. For this investigation the NASA rotor 67 is chosen as a reference test case and its performance under boundary layer ingestion (BLI) conditions is evaluated. For the shape morphing assessment, FEA morphing simulations are tightly coupled with a geometry re-engineering methodology and stationary CFD simulations of the actuated fan rotor geometries under distorted inflow. For the chosen test case, the achievable deformations are however too small to compensate for the strong distortion effects of a blended wing body’s boundary layer. Therefore, the blade reference design needs to be adapted in order to increase the achievable deformations. This includes the investigation of typical compressor design parameter variations, such as blade hub-to-tip ratio, chord length as well as lean and sweep and their impact on the deformability of a shape-adaptive fan stage.

Item URL in elib:https://elib.dlr.de/198517/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Project funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany´s Excellence Strategy – EXC 2163/1- Sustainable and Energy Efficient Aviation – Project-ID 390881007. The conference proceedings can be found and downloaded from here: https://www.eccomasproceedia.org/conferences/thematic-conferences/smart-2023?
Title:Aerostructural investigation of shape adaptive rotor blading for the reduction of BLI induced losses in the distorted flow regimes of a transonic fan rotor
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Montano Rejas, ZhuzhellUNSPECIFIEDhttps://orcid.org/0000-0002-3529-7532UNSPECIFIED
Friedrichs, JensInstitute of Jet Propulsion and Turbomachinery, University of Braunschweig, Hermann-Blenk-Str. 37, Braunschweig 38108, GermanyUNSPECIFIEDUNSPECIFIED
Monner, Hans PeterUNSPECIFIEDhttps://orcid.org/0000-0002-5897-2422UNSPECIFIED
Riemenschneider, JohannesUNSPECIFIEDhttps://orcid.org/0000-0001-5485-8326UNSPECIFIED
Date:3 July 2023
Journal or Publication Title:10th ECCOMAS Thematic Conference on Smart Structures and Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iDORCID Put Code
Series Name:SMART 2023
Keywords:Fan Design, Morphing engine blades, boundary layer ingestion, BLI, shape adaption
Event Title:10th ECCOMAS Thematic Conference on Smart Structures and Materials
Event Location:Patras, Griechenland
Event Type:international Conference
Event Start Date:3 July 2023
Event End Date:5 July 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment, L - Components and Emissions, L - Structural Materials and Design, L - Future Engines and Engine Integration, L - Virtual Engine
Location: Braunschweig
Institutes and Institutions:Institut für Systemleichtbau > Adaptronics
Institut für Systemleichtbau > Innovation
Institute of Flight Systems > Safety Critical Systems&Systems Engineering
Deposited By: Montano Rejas, Zhuzhell
Deposited On:01 Nov 2023 08:45
Last Modified:24 Apr 2024 20:58

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