Numerical Study of Suction-Blowing Flow Control Technology for an Airfoil

Numerical Assessment of Pneumatic Devices on the Wing/Fuselage Junction of a Tiltrotor

“…In the last two decades, as a result of the continuing efforts spent in computational-fluiddynamics (CFD) calculations and a more diffuse access to adequate computational resources, research in the field of alternative devices has moved in the branch of CFD, which, in the proper context, is more affordable, practical, systematic, and reliable. Several examples of CFD computations are found in open literature (e.g., [11][12][13][14][15][16]). Huang et al [17], presented numerical-simulation results of suction and blowing control on a NACA 0012 airfoil at a Reynolds number of 5 × 10 5 and an angle of attack of 18 deg; three parameters (suction-jet location, amplitude, and angle) were changed over a wide range, and specific ranges and values of interest were discovered and analyzed.…”

Numerical Investigation of Active Control of Boundary Layer Flow Around S809 Airfoil with Suction Method

“…Genç ve Kaynak [4], üfleme veya emme kullanarak NACA 2415 kanat profili üzerinde laminer ayrılma kabarcığının meydana geldiği akışın kontrolünü hesaplamalı olarak araştırmışlardır. Türbülanslı akışa geçiş bölgesinde olan 2x10 5 Reynolds sayısında ve α=8°'de, veter uzunluğunun %2.5 genişliğindeki tek bir jeti, kanatların üst yüzeyine yerleştirmişlerdir. Jet konumları, jet hızı oranları ve jet açıları gibi çeşitli parametreler ile yapmış oldukları yaklaşık 200 sayısal simülasyonu incelemişlerdir.…”

“…Liu vd. [5], kanat profilinin sürüklenmesini azaltmak için hücum kenarında emme ve kuyruk kenarında üfleme yapan bir emme-üfleme birleşik kontrol tekniği geliştirmişlerdir. Çözümler, düzeltilmiş Wilcox k-ω geçiş modelinin [6] emmeye bağlı geçiş konumunu en doğru şekilde tahmin ettiğini göstermiştir.…”

Friction drag reduction of a spatially developing boundary layer using a combined uniform suction and blowing

“…In contrast, the uniform blowing is known to reduce the drag in the fully-turbulent regime, as studied, e.g., by Kametani and Fukagata (2011). Therefore, a combination of suction and blowing is expected to be effective for flows involving laminar-turbulent transition, such as the flow around an airfoil, by delaying the transition near the trailing edge and by reducing the turbulent drag in the post-transition (i.e., fully-turbulent) region (Liu et al, 2010). In particular, if such a control is devised to the natural laminar flow wing of the silent supersonic transport being developed by JAXA (Tokugawa et al, 2006), its fuel consumption can further be reduced.…”