| Abstract |
The integration of a slotted, natural-laminar-flow (SNLF) airfoil with a transonic truss-braced wing (TTBW) configuration has been shown to offer significant benefits in comparison to other widely implemented designs for commercial transport applications. This work focuses on the computational analysis of the S207 SNLF airfoil and associated TTBW configuration and wind tunnel model. The performance of this airfoil is largely dependent on the duration of laminar flow maintained across the chord length. Thus proper prediction of the transition from laminar to turbulent flow is of top priority. Computations are performed using two closely related Reynolds-averaged Navier-Stokes (RANS) solvers operating on unstructured grids. Results using both the single-equation Menter and Two-Equation Amplification Transport (AFT2) transition prediction models are compared, with the latter demonstrating laminar flow behavior more representative of S207 airfoil design intent. Results acquired for an S207-based wind tunnel model were compared to experimental results and showed notable differences. Efforts to identify sources of these discrepancies lead to further two-dimensional and three-dimensional investigation in which transition prediction model parameters were varied. A complete set of drag polars over a range of Mach numbers was obtained for the S207 TTBW configuration demonstrating the ability to predict overall trends in performance with free transition for laminar flow aircraft designs. |
| Authors |
Cody Perkins  , Zhi Yang  , Dimitri J. Mavriplis , James G. Coder , Lawton Shoemake , Christopher J. Axten
|
| Journal Info |
Not listed | AIAA SCITECH 2023 Forum
|
| Publication Date |
1/19/2023 |
| ISSN |
Not listed |
Type |
article |
| Open Access |
closed
|
| DOI |
https://doi.org/10.2514/6.2023-2454 |
| Keywords |
Turbulence Modeling (Score: 0.524268) , Aerodynamic Flow Control (Score: 0.501286)
|
