Optimisation of a high pressure ratio radial-inflow turbine: coupled CFD-FE analysis

Shanechi, Mohsen Modir, Odabaee, Mostafa and Hooman, Kamel (2015). Optimisation of a high pressure ratio radial-inflow turbine: coupled CFD-FE analysis. In: ASME Turbo Expo 2015: Turbine Technical Conference and Exposition (GT2015). ASME Turbo Expo, Montreal, Canada, (). 15-19 June 2015. doi:10.1115/GT2015-42208

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Author Shanechi, Mohsen Modir
Odabaee, Mostafa
Hooman, Kamel
Title of paper Optimisation of a high pressure ratio radial-inflow turbine: coupled CFD-FE analysis
Conference name ASME Turbo Expo
Conference location Montreal, Canada
Conference dates 15-19 June 2015
Convener International Gas Turbine Institute
Proceedings title ASME Turbo Expo 2015: Turbine Technical Conference and Exposition (GT2015)
Journal name Proceedings of the ASME Turbo Expo
Place of Publication New York, NY, United States
Publisher American Society of Mechanical Engineers (ASME)
Publication Year 2015
Sub-type Fully published paper
DOI 10.1115/GT2015-42208
Open Access Status Not Open Access
ISBN 9780791856659
Volume 2C
Total pages 13
Collection year 2016
Language eng
Formatted Abstract/Summary
The optimisation of a 5.7 air pressure ratio single stage radial-inflow turbine applied in the Sundstrand Power Systems T-100 Multipurpose Small Power Unit (MPSPU) is performed using coupled CFD-FE method. The commercial software ANSYS-Vista RTD along with a built-in module, BladeGen, is used to conduct a meanline design and, consequently, create the 3D geometry of the flow passage. Carefully examining the proposed design against the geometrical and experimental data, ANSYS-TurboGrid is applied to generate computational mesh. CFD simulations are then performed with ANSYS-CFX in which three-dimensional Reynolds-Averaged Navier-Stokes equations are solved subject to appropriate boundary conditions. Conducting the CFD simulations, the pressure and temperature distributions are imported to the ANSYS-FE module. The von Mises stress σv distribution is then calculated taking into account the centrifugal force acting on the turbine wheel.

To obtain the optimised geometry, 25 major design points are regenerated where the meridional parameters, tip clearance, and blade thickness distribution are systematically changed. Furthermore, constraints are defined as high aerothermodynamic performance and acceptable vibration with a stress distribution less than yield limit of the turbine material. Results of coupled CFD-FE method show the power, efficiency, stress and deformation. Finally, performance of the optimised radial-inflow turbine indicates enhanced aero-thermodynamics (ηTS and) and structural performance (σv) compared to the MPSPU turbine design.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Thu, 24 Mar 2016, 07:57:52 EST by Mr Mostafa Odabaee on behalf of School of Mechanical and Mining Engineering