000064340 001__ 64340
000064340 005__ 20190619003121.0
000064340 0247_ $$2doi$$a10.5075/epfl-thesis-3448
000064340 02470 $$2urn$$aurn:nbn:ch:bel-epfl-thesis3448-7
000064340 02471 $$2nebis$$a5081901
000064340 037__ $$aTHESIS
000064340 041__ $$aeng
000064340 088__ $$a3448
000064340 245__ $$aSurface parameterization and optimum design methodology for hydraulic turbines
000064340 269__ $$a2006
000064340 260__ $$bEPFL$$c2006$$aLausanne
000064340 300__ $$a244
000064340 336__ $$aTheses
000064340 502__ $$aMichel Deville, Kiriakos Giannakoglou, Jacques Giovanola, Jean-Louis Kueny, Farid Mazzouji
000064340 520__ $$aThis thesis presents a methodology for the design optimization of hydraulic runner blades. The originality of the methodology comes from the geometric definition of the blade shapes, which uses parametric surfaces instead of a set of profiles. The main advantage of using surfaces is the number of parameters required. The use of surfaces requires a different technique for the blade construction when compared to traditional approaches. NURBS surfaces are used for the geometric representation, the properties provided by such parametric formulation permit to reach the necessary flexibility and accuracy to be attained. Moreover, the surface approach can be seen as a way to liberate the blade design from traditional discrete sectional approaches. Actual blade optimization procedures are a compromise between the quality of the design, its performance analysis and the subsequent computational time-consumed effort. The improvements provided by the above mentioned geometric definition allow the use of more realistic analysis tools for the design evaluation. Thus, Navier-Stokes (k – ε) simulations are integrated in a simple and direct optimization process. The resulting methodology is not penalized by the time-effort required and becomes of interest for its use in industrial applications. Finally, we supply a number of examples to demonstrate the feasibility of the optimization proposal. These examples illustrate the application of the methodology at different levels of geometric complexity. They are interesting not only through the results obtained, but also because they become acceptable in terms of time consumed on daily and industrial applications.
000064340 700__ $$0(EPFLAUTH)144306$$g144306$$aFerrando López, Lluis
000064340 720_2 $$aAvellan, François$$edir.$$g104417$$0241012
000064340 8564_ $$uhttps://infoscience.epfl.ch/record/64340/files/EPFL_TH3448.pdf$$zTexte intégral / Full text$$s3067038$$yTexte intégral / Full text
000064340 909C0 $$xU10309$$0252135$$pLMH
000064340 909CO $$pthesis-bn2018$$pthesis-public$$pDOI$$ooai:infoscience.tind.io:64340$$qGLOBAL_SET$$pSTI$$pthesis$$qDOI2
000064340 918__ $$bSTI-SGM$$cISE$$aSTI
000064340 919__ $$aLMH
000064340 920__ $$b2005$$a2006-2-10
000064340 970__ $$a3448/THESES
000064340 973__ $$sPUBLISHED$$aEPFL
000064340 980__ $$aTHESIS