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Performance and Emissions Benefits of Cooled Ceramic Matrix Composite Vanes for High-Pressure Turbines

Wehrel, Patrick and Schöffler, Robin and Grunwitz, Clemens and Carvalho, Francisco and Plohr, Martin and Häßy, Jannik and Petersen, Anna (2023) Performance and Emissions Benefits of Cooled Ceramic Matrix Composite Vanes for High-Pressure Turbines. Journal of Engineering for Gas Turbines and Power, 145 (12). American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4063534. ISSN 0742-4795.

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Official URL: https://asmedigitalcollection.asme.org/gasturbinespower/article/145/12/121016/1168883/Performance-and-Emissions-Benefits-of-Cooled


Ceramic matrix composites (CMCs) offer great potential for developing lighter and more efficient aero-engines. Due to their high-temperature capability, CMCs are mainly used in the hot gas section in order to replace cooled metallic components and thus save cooling air. Especially CMC vanes for high-pressure turbines (HPTs) have been researched and tested in the past. A realistic design approach for cooled CMC vanes is the so-called shell and spar concept. The application of such vanes in HPTs as inlet guide vanes (IGVs) at constant rotor inlet temperature (T41) enables performance and emissions benefits which are assessed by means of a reference engine in this paper. Compared to metallic IGVs, more temperature-resistant CMC IGVs require significantly less cooling air and generate lower cooling losses. A quantitative comparison will be presented. Consequently, the redesign of the reference engine to the setting of a hybrid HPT leads to a reduction in thrust specific fuel consumption (TSFC) by 0.23% at cruise conditions. Additionally, there is potential to extract the IGV cooling air at a lower pressure level, increasing the cruise TSFC gain to 0.41%. In the course of the redesign process, the turbine inlet temperature (T4) is reduced by 50 K in order to reach the same T41 with a lower IGV coolant mass flow. Regarding emissions, this leads to a decreased production of nitrogen oxides (NOx). Hence, several NOx emissions parameters can be reduced by more than 4%.

Item URL in elib:https://elib.dlr.de/198611/
Document Type:Article
Title:Performance and Emissions Benefits of Cooled Ceramic Matrix Composite Vanes for High-Pressure Turbines
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schöffler, RobinUNSPECIFIEDhttps://orcid.org/0000-0002-0931-9021UNSPECIFIED
Grunwitz, ClemensUNSPECIFIEDhttps://orcid.org/0000-0003-4157-7415UNSPECIFIED
Carvalho, FranciscoUNSPECIFIEDhttps://orcid.org/0000-0002-3069-8345UNSPECIFIED
Plohr, MartinUNSPECIFIEDhttps://orcid.org/0000-0002-6165-0838UNSPECIFIED
Petersen, AnnaUNSPECIFIEDhttps://orcid.org/0000-0003-4819-4994UNSPECIFIED
Date:26 October 2023
Journal or Publication Title:Journal of Engineering for Gas Turbines and Power
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:American Society of Mechanical Engineers (ASME)
Keywords:CMC, Conceptual Design, Cooling, Cooling Losses, Emissions, Hybrid Turbine, Multidimensional Modeling, NOx, Performance, SiC/SiC, Turbine
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Future Engines and Engine Integration
Location: Göttingen , Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine
Institute of Propulsion Technology > Turbine
Deposited By: Wehrel, Patrick
Deposited On:31 Oct 2023 12:47
Last Modified:31 Oct 2023 12:47

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