Parallel Computations of Unsteady Euler Equations on Dynamically Deforming Unstructured Grids

Simulating aeroelastic response of a self-sustained oscillating rigid airfoil using a boundary oscillation method

“…Comparison between results with valid experimental 36 and numerical 37 articles for NACA 0012 airfoil M=0.755,k=0.0814, αm=2.51∘, α0=0.016∘.…”

“…31 Figure 8 presents the comparison of the calculated lift coefficient versus the instantaneous angle of attack with the experimental and numerical results. 36,37 Uzun 37 used a parallel algorithm to solve inviscid unsteady flow in a dynamic unstructured mesh, while here, the static network is employed with oscillation at the boundary condition. Both numerical methods do not have a good consistency with experimental results at the low angles of attack which is obtained under neglecting the viscosity effects.…”

Transonic Flow Simulation Around the Pitching Airfoil with Accurate Pressure-Based Algorithm

“…The computed variation of the lift coefficient versus angle of attack for inviscid and viscous flows during the third cycle is compared with that Landon [14] and Uzun [15] and in Figure 8. The existence of this variation loop is the result of induced velocities, which result in different lift coefficients between the up and down strokes.…”

“…Figure 8b shows the C l versus α for inviscid case. Uzun [15] non moving mesh with oscillation of flow boundary condition is applied. It can be seen that both methods are not good agreement with experimental data particularly at the lowest angle of attack.…”

Recent Enhancements to USM3D Unstructured Flow Solver for Unsteady Flows

“…The subproject is sponsored at Langley under the Efficient Aerodynamics and Shapes Integration (EASI) project, under the Vehicle Systems Program. A NASA symposium for COMSAC [1,2] held in Hampton, Virginia on September [23][24][25]2003 brought together over 100 attendees from over 35 organizations to initiate dialog between the S&C and CFD communities, to begin assessment of the state-of-the-art in S&C prediction methods, and to explore how best to pool our resources and energies toward the COMSAC goals. While such a task is daunting, some promising activities and partnerships are beginning to emerge.…”