New wall motion actuator using magnetic fluid and elastic membrane for laminar flow control

Jae Hung Han; Junji Tani; Jinhao Qiu; Yasuaki Kohama; Yoshihiro Shindo

doi:10.1106/V1X6-YE9X-4KJ3-JJ3B

New wall motion actuator using magnetic fluid and elastic membrane for laminar flow control

Jae Hung Han, Junji Tani, Jinhao Qiu, Yasuaki Kohama, Yoshihiro Shindo

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A new wall motion actuator for the control of boundary layer flow is presented. The actuator consists of a magnetic fluid layer with an elastic membrane surface and coil system. The vertical motion of the elastic membrane is generated when the magnetic fields are applied to the magnetic fluid. It is possible to control the wall motion by the adjustment of the electric current to the coils. The static and dynamic characteristics of the new actuators have been experimentally investigated. The effectiveness of the actuator for laminar flow control has been shown via wind tunnel testing. Two-dimensional travelling waves, or Tollmien-Schlichting waves (T-S waves), have been effectively attenuated by using the new actuator.

Original language	English
Pages (from-to)	149-154
Number of pages	6
Journal	Journal of Intelligent Material Systems and Structures
Volume	10
Issue number	2
DOIs	https://doi.org/10.1106/V1X6-YE9X-4KJ3-JJ3B
Publication status	Published - 1999 Jan 1

ASJC Scopus subject areas

Materials Science(all)
Mechanical Engineering

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AU - Han, Jae Hung

AU - Tani, Junji

AU - Qiu, Jinhao

AU - Kohama, Yasuaki

AU - Shindo, Yoshihiro

PY - 1999/1/1

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N2 - A new wall motion actuator for the control of boundary layer flow is presented. The actuator consists of a magnetic fluid layer with an elastic membrane surface and coil system. The vertical motion of the elastic membrane is generated when the magnetic fields are applied to the magnetic fluid. It is possible to control the wall motion by the adjustment of the electric current to the coils. The static and dynamic characteristics of the new actuators have been experimentally investigated. The effectiveness of the actuator for laminar flow control has been shown via wind tunnel testing. Two-dimensional travelling waves, or Tollmien-Schlichting waves (T-S waves), have been effectively attenuated by using the new actuator.

AB - A new wall motion actuator for the control of boundary layer flow is presented. The actuator consists of a magnetic fluid layer with an elastic membrane surface and coil system. The vertical motion of the elastic membrane is generated when the magnetic fields are applied to the magnetic fluid. It is possible to control the wall motion by the adjustment of the electric current to the coils. The static and dynamic characteristics of the new actuators have been experimentally investigated. The effectiveness of the actuator for laminar flow control has been shown via wind tunnel testing. Two-dimensional travelling waves, or Tollmien-Schlichting waves (T-S waves), have been effectively attenuated by using the new actuator.

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New wall motion actuator using magnetic fluid and elastic membrane for laminar flow control

Abstract

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