COMPUTATIONAL SIMULATION OF DYNAMIC STALL ON THE NLR 7301 AIRFOIL

✍ Scribed by S. WEBER; M.F. PLATZER

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 370 KB
• Volume: 14
• Category: Article
• ISSN: 0889-9746
• DOI: 10.1006/jfls.2000.0299

✦ Synopsis

The dynamic stall behavior of the supercritical NLR 7301 airfoil is analyzed with a 2-D thin-layer Navier}Stokes code. The code solves the compressible Reynolds-averaged Navier-Stokes equations with an upwind biased numerical scheme in combination with the Baldwin}Lomax or the Baldwin}Barth turbulence models. The e!ect of boundary layer transition is incorporated using the transition length model of Gostelow et al. The transition onset location is determined with Michel's formula or it can be speci"ed as an input parameter. The two turbulence models yield signi"cantly di!erent steady-state lift coe$cients at incidences greater than 83. The use of the one-equation Baldwin}Barth model together with the Gostelow transition model is found to give substantially better agreement with the experimental data of McCroskey et al. than the Baldwin}Lomax model. Also, the unsteady computations are strongly a!ected by the choice of the turbulence model. The Baldwin}Barth model predicts the lift hysteresis loops consistently better than the algebraic turbulence model. However, the one-equation model improves the prediction of the moment hysteresis loops only for one test case.