OPTIMIZATION SCHEME for a SMALL CROSS-FLOW HYDRO TURBINE RUNNER | ||||
The International Conference on Applied Mechanics and Mechanical Engineering | ||||
Article 36, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 22-38 PDF (670.66 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/amme.2008.39255 | ||||
View on SCiNiTO | ||||
Authors | ||||
AKCAN C.1; AKSIT M. F.2; KIZILTAS G.3; KANDEMIR I.4 | ||||
1Graduate student, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey. | ||||
2Associate professor, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey. | ||||
3Assistant professor, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey. | ||||
4Assistant professor, Design and Manufacturing Engineering, Gebze Institute of Technology, Kocaeli, Turkey. | ||||
Abstract | ||||
ABSTRACT Obtaining a closed form analytical formulation for complex mechanical structures such as turbine rotors with multiple blade assemblies can be very problematic. Building a prototype without optimizing the structural stress levels may result in unnecessary hardware costs. In this work, mathematical models for highest stress or lowest factor of safety on critical components of a small modular cross-flow hydro turbine rotor have been explored for various design options through a response surface analysis. The response surface model is obtained based on finite element analysis results following design of simulated experiments. Rotor design parameters have been investigated to optimize factor of safety on critical components without violating the specified weight limits. Box-Henken data tables have been used to obtain the response surface model. The attained response model yields the maximum stress and lowest factor of safety for critical rotor components for various combinations of design parameters. Verification runs indicate that response model successfully predicts factor of safety levels close to finite element calculations. | ||||
Keywords | ||||
Hydraulic machinery; turbine; multidisciplinary design; Optimization; Response surface methodology; Sequential Quadratic Programming; Genetic Algorithm | ||||
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