FPM Liquid for Fluid Structure Interaction in Aeronautics: Ditching, Floatation, Fuel Sloshing

Kurzfassung

The investigation of aircraft structures under challenging loading conditions that may occur during regular aircraft operation or especially in emergency situations is an important research field at the DLR Institute of Structures and Design . This also includes the transient interaction between the aircraft and fluids, such as water during ditching and floatation or sloshing liquid hydrogen in cryogenic tanks for new climate-neutral aircraft concepts. To analyze fluid-structure-interaction we currently evaluate and validate the mesh-free Finite Pointset Method (FPM) for flow simulations coupled with the explicit structural solver in VPS. Due to its implicit time integration schema, FPM allows larger timesteps and therefore results in moderate simulation times on High Performance Computing (HPC) environments. In the presentation, representative results from the research fields ditching, floatation and sloshing will be presented and compared with test/ literature data or reference simulations using other numerical methods such as SPH.