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Turbine Passage Design Methodology to Minimize Entropy Production—A Two-Step Optimization Strategy

1
School of Aeronautical Engineering, Purdue University, West Lafayette, IN 47906, USA
2
School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-2088, USA
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(6), 604; https://doi.org/10.3390/e21060604
Received: 1 May 2019 / Revised: 10 June 2019 / Accepted: 12 June 2019 / Published: 18 June 2019
(This article belongs to the Special Issue Advances in Applied Thermodynamics III)
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Abstract

Rapid aerodynamic design and optimization is essential for the development of future turbomachinery. The objective of this work is to demonstrate a methodology from 1D mean-line-design to a full 3D aerodynamic optimization of the turbine stage using a parameterization strategy that requires few parameters. The methodology is tested by designing a highly loaded and efficient turbine for the Purdue Experimental Turbine Aerothermal Laboratory. This manuscript describes the entire design process including the 2D/3D parameterization strategy in detail. The objective of the design is to maximize the entropy definition of efficiency while simultaneously maximizing the stage loading. Optimal design trends are highlighted for both the stator and rotor for several turbine characteristics in terms of pitch-to-chord ratio as well as the blades metal and stagger angles. Additionally, a correction term is proposed for the Horlock efficiency equation to maximize the accuracy based on the measured blade kinetic losses. Finally, the design and performance of optimal profiles along the Pareto front are summarized, featuring the highest aerodynamic performance and stage loading. View Full-Text
Keywords: optimization; turbine; turbomachinery; design optimization; turbine; turbomachinery; design
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Juangphanich, P.; De Maesschalck, C.; Paniagua, G. Turbine Passage Design Methodology to Minimize Entropy Production—A Two-Step Optimization Strategy. Entropy 2019, 21, 604.

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