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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. In: ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023. ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, 2023-06-26 - 2023-06-30, Boston, Massachusetts, USA. doi: 10.1115/GT2023-101601. ISBN 978-079188694-6.

Full text not available from this repository.

Official URL: https://asmedigitalcollection.asme.org/GT/proceedings-abstract/GT2023/86946/V002T02A004/1167811

Abstract

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/197907/
Document Type:Conference or Workshop Item (Speech)
Title:Performance and Emissions Benefits of Cooled Ceramic Matrix Composite Vanes for High Pressure Turbines
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wehrel, PatrickUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schöffler, RobinUNSPECIFIEDhttps://orcid.org/0000-0002-0931-9021147516218
Grunwitz, ClemensUNSPECIFIEDhttps://orcid.org/0000-0003-4157-7415UNSPECIFIED
Carvalho, FranciscoUNSPECIFIEDhttps://orcid.org/0000-0002-3069-8345155311337
Plohr, MartinUNSPECIFIEDhttps://orcid.org/0000-0002-6165-0838UNSPECIFIED
Häßy, JannikUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petersen, AnnaUNSPECIFIEDhttps://orcid.org/0000-0003-4819-4994UNSPECIFIED
Date:28 September 2023
Journal or Publication Title:ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI:10.1115/GT2023-101601
Series Name:Volume 2: Ceramics and Ceramic Composites; Coal, Biomass, Hydrogen, and Alternative Fuels
ISBN:978-079188694-6
Status:Published
Keywords:CMC, conceptual design, cooling, cooling losses, emissions, hybrid turbine, multidimensional modeling, NOx, performance, SiC/SiC, turbine
Event Title:ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition
Event Location:Boston, Massachusetts, USA
Event Type:international Conference
Event Start Date:26 June 2023
Event End Date:30 June 2023
Organizer:American Society of Mechanical Engineers (ASME)
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:09 Oct 2023 10:40
Last Modified:24 Apr 2024 20:58

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