Chemical flow control method using combination of hydrophobic and hydrophilic coatings

Hirotaka Sakaue*, Katsuaki Morita, Mineo Goto, Megumi Shimizu, Tsuyoshi Hyakutake, Hiroyuki Nishide

*この研究の対応する著者

研究成果: Conference contribution

抄録

A chemical flow control method using functional chemical is discussed. The method uses functional chemicals, which have hydrophobic and hydrophilic characteristics. A passive flow control of this method is shown by coating these chemicals separately on a control surface. Drop tests of an ogive shape model in water tower show that combinations of hydrophobic and hydrophilic coatings vary the speed in dropping direction by the maximum 22%. By controlling the coating area and coating location, intermediate speeds are obtained. As an active flow control, a temperature-sensitive micelle polymer is shown. This polymer is hydrophobic at higher temperature, while it is hydrophilic at lower temperature. The temperature range tested is from 25°C to 64°C. The rate of change in contact angle is ranged from 0.9 degree/°C to 1.6 degree/°C.

本文言語English
ホスト出版物のタイトル46th AIAA Aerospace Sciences Meeting and Exhibit
出版ステータスPublished - 2008
イベント46th AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV
継続期間: 2008 1 72008 1 10

Other

Other46th AIAA Aerospace Sciences Meeting and Exhibit
CityReno, NV
Period08/1/708/1/10

ASJC Scopus subject areas

  • 航空宇宙工学

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