{"title":"Multi-Objective Optimization of a Steam Turbine Stage","authors":"Alvise Pellegrini, Ernesto Benini","volume":79,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1514,"pagesEnd":1528,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/16437","abstract":"
The design of a steam turbine is a very complex
\r\nengineering operation that can be simplified and improved thanks to
\r\ncomputer-aided multi-objective optimization. This process makes use
\r\nof existing optimization algorithms and losses correlations to identify
\r\nthose geometries that deliver the best balance of performance (i.e.
\r\nPareto-optimal points).
\r\nThis paper deals with a one-dimensional multi-objective and
\r\nmulti-point optimization of a single-stage steam turbine. Using a
\r\ngenetic optimization algorithm and an algebraic one-dimensional
\r\nideal gas-path model based on loss and deviation correlations, a code
\r\ncapable of performing the optimization of a predefined steam turbine
\r\nstage was developed. More specifically, during this study the
\r\nparameters modified (i.e. decision variables) to identify the best
\r\nperforming geometries were solidity and angles both for stator and
\r\nrotor cascades, while the objective functions to maximize were totalto-
\r\nstatic efficiency and specific work done.
\r\nFinally, an accurate analysis of the obtained results was carried
\r\nout.<\/p>\r\n","references":"
[1] Singiresu S. Rao, Engineering Optimization: Theory and Practice, 2009,\r\nJohn Wiley & Sons, Inc., Hoboken, New Jersey\r\n[2] E. Benini, G. Boscolo, A. Garavello, 2008, Assessment of loss\r\ncorrelations for performance prediction of low reaction gas turbine\r\nstages, Proceedings of the ASME International Mechanical Engineering\r\nCongress and Exposition, IMECE08, Boston, Massachusetts, USA,\r\nIMECE2008-69085, 2008\r\n[3] D. G. Ainley and. G. C. R. Mathieson, 1951, A Method of Performance\r\nEstimation for Axial-Flow Turbines, A.R.C. R.&M. No. 2974, Great\r\nBritain\r\n[4] H. R. M. Craig and H. J. A. Cox, 1971, Performance estimation of axial\r\nflow turbines, Proceedings Institution of Mechanical Engineers, 1970-\r\n1971, v. 185, 32\/71, Great Britain\r\n[5] Sandrolini Sandro and Naldi Giovanni, Macchine 2: Le turbomacchine\r\nmotrici e operatrici, 1996, Pitagora editrice, Bologna (ITA), ISBN: 88-\r\n371-0827-3.<\/p>\r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 79, 2013"}