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.
|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月 7 → 2008 1月 10
|Other||46th AIAA Aerospace Sciences Meeting and Exhibit|
|Period||08/1/7 → 08/1/10|
ASJC Scopus subject areas