21st AIAA Applied Aerodynamics Conference 2003
DOI: 10.2514/6.2003-4067
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Surface Oil Flow Measurements on Several Airfoils at Low Reynolds Numbers

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Cited by 32 publications
(14 citation statements)
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“…In the drag polar plots in Fig.3, a slight increment in CD is observed at AOA=4°. McGranahan and Selig [8] identify this as "bubble drag" and it's associated with the presence of LSB. The bubble drag is larger at Re=60,000 compared to Re=100,000 which is presumably because of longer LSB.…”
Section: Force Measurementsmentioning
confidence: 95%
See 1 more Smart Citation
“…In the drag polar plots in Fig.3, a slight increment in CD is observed at AOA=4°. McGranahan and Selig [8] identify this as "bubble drag" and it's associated with the presence of LSB. The bubble drag is larger at Re=60,000 compared to Re=100,000 which is presumably because of longer LSB.…”
Section: Force Measurementsmentioning
confidence: 95%
“…Tani [7] from his work showed that the short bubble may burst at higher AOAs causing separated flow or converting to a rather longer LSB downstream. McGranahan and Selig [8] performed oil flow visualization experiments on seven different airfoils at Re = 200,000 , 300,000 and 500,000. These airfoils included E387, FX 63-137, NASA NLF(1)-0414F, S822, S8306, SD7003, SD7307.…”
Section: Introductionmentioning
confidence: 99%
“…9(d) illustrates the connection between the laminar separation bubble and the skin friction coefficient C f distribution. Laminar flow is seen to exist from the leading edge to approximately x/c = 30% because of the positive sign of C f. 16 Then separation begins at the point where C f =0 and ends where C f turns from negative to positive at x/c =50%. The flow is mainly stagnant in this region and is consistent with the so-called laminar separation bubble.…”
Section: Water Tunnel Testsmentioning
confidence: 97%
“…Nonetheless, this code is not always accurate for other airfoils analyzed at low Reynolds numbers. In particular, it does not always predict the location of turbulent separation accurately as shown by McGranahan and Selig [66], which can result in significant discrepancies in JERT-14-1403, Van Treuren drag prediction. Additionally, neither of these codes predicts post-stall performance accurately, which is extremely important for stall-controlled blades.…”
mentioning
confidence: 89%