Investigation of flow past a translatoric oscillating airfoil using detached eddy simulation

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Abstract

Wind turbine rotor blades in operation have been observed to undergo stall-induced lead-lag instabilities resulting in dramatic reduction of blade life, due to structural fatigue. Previous attempts to numerically simulate the flow past a translatoric oscillating airfoil have been few and feeble at the high angle of attacks often experienced by the individual rotor blade. The present paper covers simulation of a translatoric oscillating NACA 0015 airfoil at a Reynolds number of 555,000, corresponding to avialable experimental data, using the newly adopted Detached Eddy Simulation (DES) approach. The DES method difines a hybrid method combining Reynolds Averaged Navier-Stokes (RANS) in the attached boundary layer with Large Eddy Simulation (LES) in the outer separated regions, thus resolving largescaled transient turbulent motion. Comparison to existing unsteady k-w-SST RANS simulations and detailed experiments shows that DES improves the lift- and drag prediction along with improved realism in resolved flow fields.Results are presented for angel of attack of 15 eg. and translatoric oscillation angle of 5 deg. about the chord wise direction.See Figure 1. Low-frequency vortex shedding, corresponding to Strouhal numer St=0.02, were found from the DES, which is comparable to numerical and experimental results obtianed by others.
Original languageEnglish
Title of host publicationEuropean Wind Energy Conference & Exhibition
Number of pages9
Place of PublicationProc. CD-ROM, www.ewea.org
PublisherEuropean Wind Energy Association (EWEA)
Publication date2003
Publication statusPublished - 2003
Event2003 European Wind Energy Conference and Exhibition - Madrid, Spain
Duration: 16 Jun 200319 Jun 2003

Workshop

Workshop2003 European Wind Energy Conference and Exhibition
CountrySpain
CityMadrid
Period16/06/200319/06/2003

Cite this

Reck, M., Hansen, M. O. L., & Sørensen, J. N. (2003). Investigation of flow past a translatoric oscillating airfoil using detached eddy simulation. In European Wind Energy Conference & Exhibition Proc. CD-ROM, www.ewea.org: European Wind Energy Association (EWEA).