External Aerodynamics. Cartesian grid with SGGR (Sub Grid Geometry Resolution) technology allows catching most complex body surfaces and one-button replacement of geometries for revision works in projects. Additionally, high resolution and orthogonal boundary layer meshes can be generated on boundaries by using OBL method of FlowVision. Thanks to aforementioned and additional capabilities; FlowVision is extensively used for various external aerodynamics simulations in aviation industry such as calculation of aerodynamic forces & coefficients, engine intake & hull optimization, aerodynamic compatibility investigation and detailed flow investigation of wakes, separation points and turbulence onset.
Subsonic, Transonic and Supersonic Flows. FlowVision’s general Navier-Stokes solver is capable of resolving subsonic, transonic, supersonic and hypersonic flows. This avoids necessity of using different solvers in a solution. Users are not expected to manually address regions of different flow regimes and shock generation points.
Simulation of Moving Flaps, Landing Gears, etc. FlowVision’s advanced moving body technology on Cartesian grid allows any type of rotational and translational body motions including inertial force and movement calculations. In this context, dynamic coefficients can be obtained through transient simulations where angle of attack is changing dynamically. In case of very small clearances occurring in regions like flap-wing interfaces; FlowVision’s unique gap model is applied to resolve these clearances which are almost impossible to mesh with traditional approaches.
Store Separation. In FlowVision, 6-DOF motion of objects can be defined or calculated dependent on external and aerodynamic forces. Meshing technology allows for objects to partially or fully enter/exit computational region. Objects can be allowed to interfere within each other and with computational volume borders.
Water Landing & Splashdown. Hydroplanes and helicopters can be modeled as either rigid moving bodies in FlowVision or as deformable objects in a FSI application. By allowing/not allowing each translational and rotational degree of freedom, dynamic stability of aerial vehicles landing on water can be accurately analyzed. In such cases, FlowVision’s extended VOF method serves for high accuracy free surface tracking.
Gas Turbines & Compressors. In the case of rotating turbomachines and their parts; FlowVision allows for simulations with rotating bodies with automatic grid update and also sliding mesh which is mostly preferred for rotor/stator interactions. In addition to that, moment inertia of blades can be defined by user as a result of which inertial rotations are calculated based on aerodynamic forces. Once FlowVision is integrated with a FEA code such as ABAQUS, aeromechanics analysis can be performed to determine flutter characteristics. Finally, various combustion models are included in FlowVision for simulating reacting flows in combustion chambers and internal combustion engines.
Fuel Tank & Oil Pan Sloshing. FlowVision’s Extended VOF Method helps in simulating transient free surface tracking in sloshing problems. Free surface movement of fuel/oil can be accurately tracked under various user-defined, time-based acceleration scenarios. Settlement in a fuel tank can be observed in specific cases such as upside down flying of an airplane.
Aeroelasticity. Through a user-friendly multi-physics manager, 2-way coupled multi-physics simulation environment including FlowVision and ABAQUS can easily be established without need for any 3rd party integration tools. This allows for simulating static/dynamic aeroelasticity problems and determining aeroelastic equilibrium of such materials. In case of turbomachine blades and wings; an aeromechanics approach via FlowVision results in accurate flutter prediction.
