Further Comparisons of Predicted and Measured Aerodynamic Characteristics of the DLR LK6E2 Missile Airframe (RANS)

Abstract

Accurate prediction of vortex dominated flows remains a challenge for moderncomputational fluid dynamics (CFD) solvers. The choice in solver settings has a large influenceon flow results and has potential to inaccurately predict complex flows if settings are notthoughtfully chosen. Discussed in this paper is the continuing research of Reynolds AveragedNavier-Stokes (RANS) predictions on the DLR LK6E2 test case as part of the NATO Scienceand Technology Organization (STO) AVT-390 Task Group, which is a continuation of theAVT-316 Task Group. Results from multiple sensitivity studies are reported including thechoice of different modelling assumptions, numerical scheme settings, and the effect of themesh on the prediction of the DLR LK6E2 missile at the conditions of interest. It has beenshown that each of these settings were shown to have a strong influence on the prediction ofthe rolling moment for this airframe. Additionally, select RANS computations will be compared to available wind tunnel data, where a further detailed discussion of the flow physicsof the test case will take place.