Towards the computation of aircraft engine fan noise generation with high order methods on GPUs

摘要

The present paper considers the computation of noise generation by aircraft engine fan with the in-house solver for graphic processing units called GHOST CFD. The solver is based on Dispersion Relation Preserving schemes which have high order of approximation and high resolution. An Optimized Low Dispersion and Dissipation Runge-Kutta scheme was utilized for the time integration. Large Eddy Simulation based on Relaxation Filtering was used for the turbulence modeling. The solver implements overset ("CHIMERA") meshes which were used as rotor-stator interface treatment. The speedup gained from graphic processing units utilization was about 12-20 times compared to modern 8-core CPU, allowing to perform computations in a reasonable time period. The computations with GHOST CFD were performed in full annulus formulation with fan and outlet guide vane blades. The results were compared with the experimental data as well as the results of similar computations in the commercial ANSYS CFX solver some of which also included inlet guide vane blades.