AVT-251: a parametric study of modified saccon geometry

Abstract eng:
The North Atlantic Treaty Organization (NATO) has been tasked with completing a “Multi-Disciplinary design and performance assessment of effective, agile NATO Air Vehicles” which has been denoted the AVT-251 task group [1]. One of the goals of this subgroup, denoted the “Aerodynamic Shaping group”, is to determine how the overall leading edge shape effects the aerodynamic characteristics. This paper presents an initial parametric study focused on mesh development. The tasks were: 1) validate the CFD predictions for the latest unmanned combat aerial vehicle (UCAV) shape against previous experimental results, and 2) design and test a meshing topology to be used for future parametric studies. Preliminary simulations were run at M202 and a = 10° and 14° . Both the lift and drag coefficients correlated very well with previous results and pressure coefficient values were almost identical. The initial success of the simulations allows for continued validation and development of the mesh topology.

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