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The New Chapter of Transonic Compressor Cascade Design at the DLR

Munoz Lopez, Edwin Joseph and Hergt, Alexander Silvio and Grund, Sebastian and Gümmer, Volker (2023) The New Chapter of Transonic Compressor Cascade Design at the DLR. Journal of Turbomachinery, pp. 1-23. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4056982. ISSN 0889-504X.

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Official URL: https://asmedigitalcollection.asme.org/turbomachinery/article/doi/10.1115/1.4056982/1159799/The-New-Chapter-of-Transonic-Compressor-Cascade


The design of compressor blades has been transformed by the advent of optimization algorithms, allowing designers to focus on finding the best optimization strategy for a desired application. However, transonic flow conditions on compressor blades still present considerable modeling challenges, even for a 2D blade section. This paper then focuses on the design of a new state-of-the-art compressor cascade for future test campaigns at the DLR's Transonic Cascade Wind Tunnel (TGK). For this purpose, a review of the cascades previously tested at the TGK was performed to select a main reference with good efficiency at high loading. The data gathered also informed the optimization strategy applied with the DLR's optimizer, AutoOpti. The process chain was evaluated with RANS CFD simulations using the DLR's solver, TRACE. The optimization was set to minimize two objective functions: the first one focused on the efficiency at the design point, and the second one focused on the efficiency over the working range. The result is a Pareto front of cascades with a wide variety of design features and an efficiency improvement over the working range of about 24%. This improvement was achieved with a comparable aerodynamic loading. Further analyses were performed to select the 'best' cascade for future test campaigns. The significant improvement obtained with respect to the reference and the wide variety of designs observed demonstrates that there is still much to be learned about blade design through optimization; even for 2D cascades and specially in transonic flow.

Item URL in elib:https://elib.dlr.de/194057/
Document Type:Article
Title:The New Chapter of Transonic Compressor Cascade Design at the DLR
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Munoz Lopez, Edwin JosephUNSPECIFIEDhttps://orcid.org/0000-0003-4511-037XUNSPECIFIED
Hergt, Alexander SilvioUNSPECIFIEDhttps://orcid.org/0009-0008-1643-7326UNSPECIFIED
Date:24 February 2023
Journal or Publication Title:Journal of Turbomachinery
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-23
Publisher:American Society of Mechanical Engineers (ASME)
Keywords:Computational Fluid Dynamics (CFD), Fan, compressor, and turbine aerodynamic design, Turbomachinery blading design
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Gas Turbine
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Fan and Compressor
Deposited By: Munoz Lopez, Edwin Joseph
Deposited On:27 Feb 2023 10:32
Last Modified:29 Mar 2023 00:03

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