• Samrat Biswas
• Animesh Roy
• Prabir Kr. De
• Bireswar Majumdar

To investigate swept-back wing configuration designed using supercritical RAE 2822 airfoil, experimental and numerical methods have been implemented. The study conducted with the wing model of aspect ratio 4, taper ratio 0.6 and was tested at Mach number 0.04 between pitch angle range of 0° and 30° in the open type subsonic wing tunnel. Numerical studies have also been performed using one equation model of Spalart-Allmaras on this wing under similar conditions. Experimental lift coefficient (CL) is calculated from data obtained using force measuring balance. Numerical results were analyzed along-side experimental data and presence of pseudo-stall was observed at around 10° AoA. Static pressure distribution measurements over wing leeward surface were acquired over six chord-wise measuring section distributed along half span of wing. And these data were also compared with numerically obtained surface pressure distribution data. The results indicated formation and development of laminar separation bubble over wing leeward surface. Several different flow regimes -laminar separation, separation bubble, bubble extension, and 3D flow were observed and analyzed. In addition to complement surface pressure distribution results and to further analyze the flow field structure around the wing model numerically calculated pathline data were also discussed. Pathline results further clarified the observation found during surface pressure distribution analysis.

Supercritical wing; pseudo-stall phenomena; lift coefficient; surface pressure coefficient distribution; pathline.

"Experimental and Numerical Investigation of Flow Field Structure over Swept Back Wing", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.42-51, March-2019, Available :http://www.jetir.org/papers/JETIR1903F07.pdf

"Experimental and Numerical Investigation of Flow Field Structure over Swept Back Wing", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp42-51, March-2019, Available at : http://www.jetir.org/papers/JETIR1903F07.pdf