Experimental investigations on friction drag reduction on an airfoil by passive blowing

Shiho Hirokawa, Kaoruko Eto, Koji Fukagata, Naoko Tokugawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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%.

Original languageEnglish
Title of host publicationFluid Mechanics
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791859025
DOIs
Publication statusPublished - 2019 Jan 1
EventASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019 - San Francisco, United States
Duration: 2019 Jul 282019 Aug 1

Publication series

NameASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019
Volume1

Conference

ConferenceASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019
CountryUnited States
CitySan Francisco
Period19/7/2819/8/1

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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  • Cite this

    Hirokawa, S., Eto, K., Fukagata, K., & Tokugawa, N. (2019). Experimental investigations on friction drag reduction on an airfoil by passive blowing. In Fluid Mechanics (ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019; Vol. 1). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/ajkfluids2019-5068