CFD-based shape optimization of steam turbine blade cascade in transonic two phase flows

Noori Rahim Abadi, Seyyed Mohammad Ali; Ahmadpour, A.; Abadi, S.M.N.R.; Meyer, Josua P.

UPSpace Home
→
Engineering, Built Environment and Information Technology
→
Mechanical and Aeronautical Engineering
→
Research Articles (Mechanical and Aeronautical Engineering)
→
View Item

dc.contributor.author	Noori Rahim Abadi, Seyyed Mohammad Ali
dc.contributor.author	Ahmadpour, A.
dc.contributor.author	Abadi, S.M.N.R.
dc.contributor.author	Meyer, Josua P.
dc.date.accessioned	2017-02-10T06:34:09Z
dc.date.issued	2017-02
dc.description.abstract	In this study CFD-based shape optimization of a 3D nozzle and a 2D turbine blade cascade is undertaken in the presence of non-equilibrium condensation within the considered flow channels. A two-fluid formulation is used for the simulation of unsteady, turbulent, supersonic and compressible flow of wet steam accounting for relevant phase interaction between nucleated liquid droplets and continuous vapor phase. An in-house CFD code is developed to solve the governing equations of the two phase flow and was validated against available experimental data. Optimization is carried out in respect to various objective functions. It is shown that nucleation rate and maximum droplet radius are the best suited target functions for reducing thermodynamic and aerodynamic losses caused by the spontaneous nucleation. The maximum increase of 2.1% in turbine blade efficiency is achieved through shape optimization process.	en_ZA
dc.description.department	Mechanical and Aeronautical Engineering	en_ZA
dc.description.embargo	2018-02-28
dc.description.librarian	hb2017	en_ZA
dc.description.uri	http://www.journals.elsevier.com/applied-thermal-engineering/	en_ZA
dc.identifier.citation	Noori Rahim Abadi, SMA, Ahmadpour, A, Abadi, SMNR & Meyer, JP 2017, 'CFD-based shape optimization of steam turbine blade cascade in transonic two phase flows', Applied Thermal Engineering, vol. 112, pp. 1575-1589.	en_ZA
dc.identifier.issn	1359-4311 (print)
dc.identifier.issn	1873-5606 (online)
dc.identifier.other	10.1016/j.applthermaleng.2016.10.058
dc.identifier.uri	http://hdl.handle.net/2263/58964
dc.language.iso	en	en_ZA
dc.publisher	Elsevier	en_ZA
dc.rights	© 2016 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Applied Thermal Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Applied Thermal Engineering, vol. 112, pp. 1575-1589, 2017. doi : 10.1016/j.applthermaleng.2016.10.058.	en_ZA
dc.subject	Two-fluid model	en_ZA
dc.subject	Wet steam	en_ZA
dc.subject	Non-equilibrium condensation	en_ZA
dc.subject	Steam turbine	en_ZA
dc.subject	Shape optimization	en_ZA
dc.subject	Computational fluid dynamics (CFD)	en_ZA
dc.title	CFD-based shape optimization of steam turbine blade cascade in transonic two phase flows	en_ZA
dc.type	Postprint Article	en_ZA