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Design of a Centrifugal Compressor Stage and a Radial-Inflow Turbine Stage for a Supercritical CO2 Recompression Brayton Cycle by Using 3D Inverse Design Method

Zhang, J; Gomes, P; Zangeneh, M; Choo, B; (2017) Design of a Centrifugal Compressor Stage and a Radial-Inflow Turbine Stage for a Supercritical CO2 Recompression Brayton Cycle by Using 3D Inverse Design Method. In: Proceedings of ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. (pp. GT2017-64631). ASME: Charlotte, NC,USA. Green open access

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Abstract

It is found that the ideal gas assumption is not proper for the design of turbomachinery blades using supercritical CO2 (S-CO2) as working fluid especially near the critical point. Therefore, the inverse design method which has been successfully applied to the ideal gas is extended to applications for the real gas by using a real gas property lookup table. A fast interpolation lookup approach is implemented which can be applied both in superheated and two-phase regimes. This method is applied to the design of a centrifugal compressor blade and a radial-inflow turbine blade for a S-CO2 recompression Brayton cycle. The stage aerodynamic performance (volute included) of the compressor and turbine is validated numerically by using the commercial CFD code ANSYS CFX R162. The structural integrity of the designs is also confirmed by using ANSYS Workbench Mechanical R162.

Type: Proceedings paper
Title: Design of a Centrifugal Compressor Stage and a Radial-Inflow Turbine Stage for a Supercritical CO2 Recompression Brayton Cycle by Using 3D Inverse Design Method
Event: ASME Turbine Technical Conference and Exposition (Turbo Expo)
Location: Charlotte, NC
Dates: 26 June 2017 - 30 June 2017
ISBN-13: 978-0-7918-5096-1
Open access status: An open access version is available from UCL Discovery
DOI: 10.1115/GT2017-64631
Publisher version: https://doi.org/10.1115/GT2017-64631
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Brayton cycle, Compressors, Design, Design methodology, Inflow, Supercritical carbon dioxide, Turbines, Blades, Computational fluid dynamics, Fluids, Interpolation, Superheating, Turbine blades, Turbomachinery
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10109464
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