HIPERLAM

High-Fidelity and High-Performance Laminar Wing Optimization

Coordinatore	more  Organization address address: Gullfossgatan 6 city: STOCKHOLM postcode: 164 90 contact info Titolo: Dr. Nome: Olivier Cognome: Amoignon Email: send email Telefono: +46 8 55503230
Nazionalità Coordinatore	Non specificata
Totale costo	249˙999 €
EC contributo	187˙499 €
Programma	FP7-JTI Specific Programme "Cooperation": Joint Technology Initiatives
Code Call	SP1-J
Anno di inizio	2012
Periodo (anno-mese-giorno)	2012-09-01   -   2014-06-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	TOTALFORSVARETS FORSKNINGSINSTITUT  Organization address address: Gullfossgatan 6 city: STOCKHOLM postcode: 164 90 contact info Titolo: Dr. Nome: Olivier Cognome: Amoignon Email: send email Telefono: +46 8 55503230	SE (STOCKHOLM)	coordinator	128˙340.00
2	KUNGLIGA TEKNISKA HOEGSKOLAN  Organization address address: Valhallavaegen 79 city: STOCKHOLM postcode: 10044 contact info Titolo: Ms. Nome: Hide Cognome: Hornk Email: send email Telefono: +46 8 7907128	SE (STOCKHOLM)	participant	59˙159.00

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 Obiettivo del progetto (Objective)

'Proposed work aims at developing efficient optimization tools for NLF design where the cost function is the total drag (pressure and friction). The tool utilizes efficient and accurate computation of gradients of objective functions as well as robust parametrization of the geometry. Our approach uses Computational Fluid Dynamics followed by accurate boundary-layer stability analysis in order to find, by optimization, geometries that damp growth of boundary-layer disturbances in order to delay the laminar-turbulence transition. Gradient-based optimization and adjoint solvers are used in order to obtain the best numerical efficiency. The gradients are obtained through a chain of computations including adjoints of the flow equations and of the parabolized stability equations. Our method was initially developed for airfoils and recently extended to 3D wing design. Here, the tool will be improved by replacing the Euler equations of fluid dynamics by the Reynolds-Averaged Navier-Stokes (RANS) equations. This allows us to account for the viscous-inviscid interactions and therefore obtain a more accurate evaluation of the aerodynamic performances such as the total drag, lift and pitching moment. In order to ensure high accuracy of the gradients, the adjoint of the RANS solver will include adjoint of the turbulence model. A mesh-less method based on Radial Basis Functions will be used for deforming the RANS meshes. This approach has proven to be much faster than elliptic smoothers on meshes that are suitable for RANS computations. Here, two shape parametrization methods suitable for industrial design will be implemented and compared. Further, an automatic and efficient procedure for nonlocal stability analysis will be implemented in order to facilitate the use of this approach in industrial projects.'