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Conventional Engineering Application and Validation

Conventional Engineering Application and Validation


Conventional Engineering Application and Validation



All conventional CFD simulations are carried out in AVICARI self-developed aeronautical numerical simulation platform ARI_CFD. Using commercial software standards and specifications as design basis, ARI_CFD can accept grids from self-developed software and commercial softwares like ICEM, Gridgen and Pontwise, support self-adapted grid, dynamic overset grid and deformed grid, and can be used to simulate steady and unsteady flow field with governing equation of EULER or N-S plus turbulent model. Inviscid flux difference scheme includes center difference scheme and upwind difference scheme (flux vector splitting and flux difference splitting schemes), while viscous flux spatial discretion scheme using center-type scheme. In ARI_CFD platform, there are more than 20 turbulence models (including transition model) and many boundary types to choose, simulation efficiency is improved by using multi-grid to accelerate convergence.



Standard Model Validation



CRM standard model drag prediction


transonic wing surface pressure distribution



highlift configuration TrapWing simulation


highlift configuration pressure distribution




ARI_CFD platform validation simulations mainly include
isolated wing ONERA-M6
wing-body DLR-F4 and DLR-F6
wing-body-empennage CRM
highlift model HiLiftPWⅠ,Ⅱ
Validation results show:
In high precision steady aerodynamic forces prediction, precision level can reach to less than 10 counts for civil aircrafts;
Compared to wind tunnel test results, in pressure distribution simulation, pressure summit and shock wave position can be accurately predicted;
Complex shape aerodynamic characteristic simulation ability is capable.



Technical Ability:




low Reynolds number model (LRN model)


nacelle intake and exhaust boundary application




图  图

application of multi-grid technology in double wing simulation


ARI_CFD has a variety of advanced CFD technologies and abilities, like:
several turbulence models, and low Reynolds number model suitable for internal flow simulation
several boundary handling ability, and special boundaries like nacelle intake and exhaust boundary, flux boundary and Mach number boundary.
self-adapted grid handling ability
multi-grid accelerating convergence technology for unstructured grid.
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