Chemical flow control method using combination of hydrophobic and hydrophilic coatings

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

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

Abstract

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.

Original languageEnglish
Title of host publication46th AIAA Aerospace Sciences Meeting and Exhibit
Publication statusPublished - 2008
Event46th AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV
Duration: 2008 Jan 72008 Jan 10

Other

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

Fingerprint

Flow control
Coatings
Water towers
Temperature
Control surfaces
Polymers
Micelles
Contact angle

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Sakaue, H., Morita, K., Goto, M., Shimizu, M., Hyakutake, T., & Nishide, H. (2008). Chemical flow control method using combination of hydrophobic and hydrophilic coatings. In 46th AIAA Aerospace Sciences Meeting and Exhibit [2008-0632]

Chemical flow control method using combination of hydrophobic and hydrophilic coatings. / Sakaue, Hirotaka; Morita, Katsuaki; Goto, Mineo; Shimizu, Megumi; Hyakutake, Tsuyoshi; Nishide, Hiroyuki.

46th AIAA Aerospace Sciences Meeting and Exhibit. 2008. 2008-0632.

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

Sakaue, H, Morita, K, Goto, M, Shimizu, M, Hyakutake, T & Nishide, H 2008, Chemical flow control method using combination of hydrophobic and hydrophilic coatings. in 46th AIAA Aerospace Sciences Meeting and Exhibit., 2008-0632, 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 08/1/7.
Sakaue H, Morita K, Goto M, Shimizu M, Hyakutake T, Nishide H. Chemical flow control method using combination of hydrophobic and hydrophilic coatings. In 46th AIAA Aerospace Sciences Meeting and Exhibit. 2008. 2008-0632
Sakaue, Hirotaka ; Morita, Katsuaki ; Goto, Mineo ; Shimizu, Megumi ; Hyakutake, Tsuyoshi ; Nishide, Hiroyuki. / Chemical flow control method using combination of hydrophobic and hydrophilic coatings. 46th AIAA Aerospace Sciences Meeting and Exhibit. 2008.
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