Chemical flow control method using combination of hydrophobic and hydrophilic coatings

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

Chemical flow control method using combination of hydrophobic and hydrophilic coatings

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

^*Corresponding author for this work

Waseda Research Institute for Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	46th AIAA Aerospace Sciences Meeting and Exhibit
Publication status	Published - 2008
Event	46th AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV Duration: 2008 Jan 7 → 2008 Jan 10

Other

Other	46th AIAA Aerospace Sciences Meeting and Exhibit
City	Reno, NV
Period	08/1/7 → 08/1/10

ASJC Scopus subject areas

Aerospace Engineering

Cite this

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title = "Chemical flow control method using combination of hydrophobic and hydrophilic coatings",

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.",

author = "Hirotaka Sakaue and Katsuaki Morita and Mineo Goto and Megumi Shimizu and Tsuyoshi Hyakutake and Hiroyuki Nishide",

year = "2008",

language = "English",

isbn = "9781563479373",

booktitle = "46th AIAA Aerospace Sciences Meeting and Exhibit",

note = "46th AIAA Aerospace Sciences Meeting and Exhibit ; Conference date: 07-01-2008 Through 10-01-2008",

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TY - GEN

T1 - Chemical flow control method using combination of hydrophobic and hydrophilic coatings

AU - Sakaue, Hirotaka

AU - Morita, Katsuaki

AU - Goto, Mineo

AU - Shimizu, Megumi

AU - Hyakutake, Tsuyoshi

AU - Nishide, Hiroyuki

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

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UR - http://www.scopus.com/inward/citedby.url?scp=78149445559&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:78149445559

SN - 9781563479373

BT - 46th AIAA Aerospace Sciences Meeting and Exhibit

T2 - 46th AIAA Aerospace Sciences Meeting and Exhibit

Y2 - 7 January 2008 through 10 January 2008

ER -

Chemical flow control method using combination of hydrophobic and hydrophilic coatings

Abstract

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ASJC Scopus subject areas

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