TY - GEN
T1 - Experimental investigations on friction drag reduction on an airfoil by passive blowing
AU - Hirokawa, Shiho
AU - Eto, Kaoruko
AU - Fukagata, Koji
AU - Tokugawa, Naoko
N1 - Funding Information:
The authors are grateful to Dr. Shinnosuke Obi and Dr. Keita Ando (Keio University) for fruitful discussion. This work was conducted as a part of the JAXA-Keio University collaborative research and also supported by JSPS KAKENHI Grant No. JP16K06900.
Publisher Copyright:
Copyright © 2019 JSME
PY - 2019
Y1 - 2019
N2 - Friction drag reduction effect of a passive blowing on a Clark-Y airfoil is investigated. The passive blowing is conducted by the pressure difference on a wing surface between suction and blowing regions. The suction and the blowing regions are respectively set around the leading edge and the rear part of the upper surface. The Reynolds number based on the chord length is 0.65×106 and 1.54×106. The angle of attack is set to 0? and 6?. The mean velocity profiles on the blowing region and the downstream are shifted away from the wall by the passive blowing. This behavior qualitatively suggests local reduction of skin friction on the wing surface. As a result of the quantitative assessment, which takes into account the effects of pressure gradient and the roughness of the wall, the local friction drag reduction effect of passive blowing is estimated to reach 4% - 23%.
AB - Friction drag reduction effect of a passive blowing on a Clark-Y airfoil is investigated. The passive blowing is conducted by the pressure difference on a wing surface between suction and blowing regions. The suction and the blowing regions are respectively set around the leading edge and the rear part of the upper surface. The Reynolds number based on the chord length is 0.65×106 and 1.54×106. The angle of attack is set to 0? and 6?. The mean velocity profiles on the blowing region and the downstream are shifted away from the wall by the passive blowing. This behavior qualitatively suggests local reduction of skin friction on the wing surface. As a result of the quantitative assessment, which takes into account the effects of pressure gradient and the roughness of the wall, the local friction drag reduction effect of passive blowing is estimated to reach 4% - 23%.
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U2 - 10.1115/ajkfluids2019-5068
DO - 10.1115/ajkfluids2019-5068
M3 - Conference contribution
AN - SCOPUS:85076413508
T3 - ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019
BT - Fluid Mechanics
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019
Y2 - 28 July 2019 through 1 August 2019
ER -