Hydrophilic Coatings for Natural Laminar Flow

Hidetoshi Iijima*, Yoshimi Iijima, Takeo Suga, Hidehiko Minami, Kazumi Takao

*Corresponding author for this work

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


The presence of surface contaminants on the wing leading edge of aircraft can expedite boundary-layer transition from laminar to turbulent. For aircraft wings to maintain natural laminar flow and reduce skin-friction drag, it is important to ensure their surfaces remain free from contaminants and/or insects. Japan Aerospace Exploration Agency has recently developed a method for maintaining laminar flow over wings. It involves the application of hydrophilic coatings on wing surfaces, which can be subsequently washed clean with water. These coatings prevent insects from adhering to the wing surface. The results of the coupon and ground tests performed in this study reveal that compared to conventional aircraft coatings, the proposed hydrophilic coatings demonstrate washabilities improved by up to 20%.

Original languageEnglish
Title of host publicationThe Proceedings of the 2021 Asia-Pacific International Symposium on Aerospace Technology APISAT 2021, Volume 1
EditorsSangchul Lee, Cheolheui Han, Jeong-Yeol Choi, Seungkeun Kim, Jeong Ho Kim
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages9
ISBN (Print)9789811926884
Publication statusPublished - 2023
EventAsia-Pacific International Symposium on Aerospace Technology, APISAT 2021 - Virtual, Online
Duration: 2021 Nov 152021 Nov 17

Publication series

NameLecture Notes in Electrical Engineering
ISSN (Print)1876-1100
ISSN (Electronic)1876-1119


ConferenceAsia-Pacific International Symposium on Aerospace Technology, APISAT 2021
CityVirtual, Online


  • Hydrophilic coating
  • Insect contamination
  • Natural laminar flow
  • Photocatalyst
  • Polymer brush

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering


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