Comparison between fully turbulent and transition models ( High-Lift configuration )

What is it about?

The work presented on this paper illustrates the Computational Fluid Dynamics (CFD) simulation of the JAXA Standard Model (JSM), with single segment baseline slat and flap in 30° with support brackets and without nacelle and pylon. This case has provided experimental data of wind tunnel testing, with the intention to be the comparison base with CFD simulations at “free air” condition. The geometry was provided by the workshop and the mesh used was a medium size mesh provided by one of the participants of the workshop, adapted from Pointwise ® to be used with ANSYS Fluent as the solver. The present paper shows the comparison between two simulation models, the k- ω SST and Transition SST for an angle of attack of 4.36°. The comparisons made involved the parameters of oil flow images, vorticity field, pressure coefficients and performance parameters such as lift and drag coefficient. The transition model offered a better accuracy of predicting how the airflow passed through the flap, resulting in a performance closer to the experimental results.

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Photo by Vishu on Unsplash

Photo by Vishu on Unsplash