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Robustness analysis of airfoil performance: DETC2010-28261
Högskolan Väst, Institutionen för ingenjörsvetenskap.ORCID-id: 0000-0001-9748-1362
2010 (Engelska)Ingår i: Proceedings of the ASME 2010 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference: August 15-18, 2010, Montreal, Quebec, Canada, ASME, the American Society of Mechanical Engineers , 2010, s. 1-6Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We demonstrate a technique to evaluate the aerodynamic robustness of a given blade profile which it is exposed to stochastic geometrical variation. The technique is based on random fields, with geometrical deviations continuously defined over the entire structure, with a prescribed statistical distribution function and a given correlation between these deviations. Control points are defined on the blade surface to model the blade geometry disturbances. At each control point a stochastic deviation is defined, which acts in the normal direction of the blade. By modeling disturbances in the normal direction instead of in the separate Cartesian directions, we automatically reduce the number of stochastic variables by a factor two. The perturbation variables are transformed via Karhunen-Loève eigenvalue decomposition, giving stochastically independent variables. The robustness is finally estimated by a Monte Carlo simulation, where computational fluid dynamic simulations are performed to evaluate the resulting change in blade performance for given geometrical perturbations.

Ort, förlag, år, upplaga, sidor
ASME, the American Society of Mechanical Engineers , 2010. s. 1-6
Nyckelord [en]
aerodynamic robustness stochastic geometrical variation deviation perturbations random fields cfd Monte Carlo
Nationell ämneskategori
Beräkningsmatematik
Forskningsämne
Matematik
Identifikatorer
URN: urn:nbn:se:hv:diva-3146OAI: oai:DiVA.org:hv-3146DiVA, id: diva2:392774
Konferens
ASME 2010 International Design Engineering Technical Conferences & Computers and Information in Engineer
Projekt
KK-stiftelsens projekt 2005/0249, Optimeringsmetoder för robust design av turbomaskinblad
Anmärkning
CD-ROM. DETC2010-28261Tillgänglig från: 2011-01-27 Skapad: 2011-01-27 Senast uppdaterad: 2015-06-24Bibliografiskt granskad

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http://www.asmeconferences.org/idetc2010/

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Lindström, David

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Institutionen för ingenjörsvetenskap
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