Three-Dimensional Navier-Stokes Simulations for Transport Aircraft High-Lift Configurations

摘要: Computations of lift and drag polars for a transport aircraft wing/fuselage high-lift cone guration using the MEGAFLOWcodesystemarecarriedoutandcomparedtowind-tunnelexperiments.Themainemphasisislaidon acomparisonoftheblock-structuredandtheunstructuredcodemodulesforsuchtypeofapplication.FortheblockstructuredFLOWercodeincombinationwith k‐! turbulencemodel,thenumericalresultsarein good agreement with available experimental data in linear CL range. Beyond 15-deg incidence, strong separation near e ap cut-out is simulated, leading to an underprediction total CL; max compared data. In contrast this, results unstructured TAU code utilizing Spalart ‐Allmaras turbulence model are characterized by nearly constant overestimation up maximum without aforementioned tendency at moderate incidences. The overprediction attributed main wing slat upperside suction peaks, which higher resolved grid. Neither reproduces breakdown beyond according experiments. use preconditioning conjunction theFLOWercodeshowsonly minorimprovement theaccuracy,but considerabledeterioration convergence properties, requiring improvements routine use. Further studies will focus on ine uence geometry simplie cations root theoretical models its impact evidence.