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Design of a Transonic High Flow Coefficient Centrifugal Compressor by Using Advanced Design Methods

Wittrock, David and Reutter, Oliver and Schmidt, Thomas and Klausmann, Jan and Nicke, Eberhard (2018) Design of a Transonic High Flow Coefficient Centrifugal Compressor by Using Advanced Design Methods. In: Proceedings of the ASME Design Engineering Technical Conference. Proceedings of ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, 11-15 June 2018, Oslo, Norway.

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Abstract

A high flow coefficient centrifugal compressor was designed in a joint cooperation of DLR and MAN Diesel & Turbo SE Berlin. The main goal of this work is to increase the flow coefficient in the aerodynamic design point by 20% in comparison to the reference design. Besides a significant increase in flow coefficient, isentropic efficiency should be at least equal to the reference design. Design methods of the last decades are not able to reach a high flow coefficient without a reasonable compromise in efficiency. Furthermore, common design methods introduce splitter blades to gain a higher flow coefficient. Usually splitter blades lead to structural mechanical issues by introducing different eigenfrequencies. Reference impeller and vaned diffuser as well as the main design goals and constraints are provided by MAN Diesel & Turbo SE Berlin. DLR performed the design studies using their in-house design suite including TRACE as the CFD solver, PERMAS as the CSM program and AutoOpti for the multiobjective optimization tool. In preliminary design investigations it was found that a reduction of blade and vane number is necessary to avoid diffuser choking at high flow coefficients. Finally, a favorable geometry is chosen for a future test rig configuration at MAN Diesel & Turbo SE Berlin. The new design works totally in transonic conditions. The selected design fulfills all aerodynamic and structural mechanical design goals.

Item URL in elib:https://elib.dlr.de/120635/
Document Type:Conference or Workshop Item (Speech)
Title:Design of a Transonic High Flow Coefficient Centrifugal Compressor by Using Advanced Design Methods
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wittrock, DavidDavid.Wittrock (at) dlr.deUNSPECIFIED
Reutter, OliverOliver.Reutter (at) dlr.deUNSPECIFIED
Schmidt, ThomasThomas.Schmidt (at) dlr.deUNSPECIFIED
Klausmann, Janjan.klausmann (at) man.euUNSPECIFIED
Nicke, EberhardEberhard.Nicke (at) dlr.deUNSPECIFIED
Date:June 2018
Journal or Publication Title:Proceedings of the ASME Design Engineering Technical Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:centrifugal compressor, radial turbomachinery aerodynamics, high flow coefficient, multidisciplinary design optimization, vaned diffuser
Event Title:Proceedings of ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
Event Location:Oslo, Norway
Event Type:international Conference
Event Dates:11-15 June 2018
Organizer:ASME International Gas Turbine Institute
HGF - Research field:Energy
HGF - Program:other
HGF - Program Themes:E - no assignment
DLR - Research area:Energy
DLR - Program:E - no assignment
DLR - Research theme (Project):E - no assignment
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Fan and Compressor
Deposited By: Wittrock, David
Deposited On:29 Jun 2018 09:04
Last Modified:16 Jul 2018 08:56

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