2007 Fiscal Year Final Research Report Summary
Active control of separation flow using jet actuator applicable to elevated temperatures
| Project/Area Number |
17360086
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
YOSHIDA Hiro National Institute of Advanced Industrial Science and Technology, AIST, Group Leader (70111416)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUNUMA Takayuki AIST, エネルギー技術研究部門, Senior Research Scientist (40358031)
IKI Norihiko AIST, エネルギー技術研究部門, Senior Research Scientist (30222847)
ABE Hiroyuki AIST, エネルギー技術研究部門, Senior Research Scientist (40356374)
HOSHI Yoshinobu AIST, エネルギー技術研究部門, Senior Research Scientist (30357941)
SEGAWA Takehiko AIST, エネルギー技術研究部門, Research Scientist (50357315)
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| Project Period (FY) |
2005 – 2007
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| Keywords | plasma actuator / high temperature flow / pulse electric power supply / jet array / active control |
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| Research Abstract |
Many thermo-fluid machineries such as gas turbines, heat exchangers and thermal engines are usually in contact with hot gases. In spite of those actual service conditions, there have been very few actuators which can be utilized at elevated temperatures. In this project, aiming at developing actuators applicable to temperatures up to 1000℃, dielectric barrier discharge plasma actuator, DBD-PA, was studied. It consists of a thin dielectric material layer sandwiched by two metal electrodes. The structure is very simple and there are no moving parts. Ordinary DBD-Pas using high-polymer dielectric materials cannot survive temperatures above 200℃. The main results obtained in the project are as follows.
1) The DBD- PA with ceramic dielectric layer was driven under temperatures up to 500℃. Beyond this temperature, the operation of the actuator was not successful. However, operation of DBD-PA under such elevated temperatures was confirmed for the first time in the world.
2) Analytical solution for the static electric field of DBD-PA was derived. The analytical results qualitatively agree with the experimental results by Forte, et. al. (2006). The analytical solution facilitates us to estimate the influences of properties of dielectric materials and geometrical conditions on induced jet velocity.
3) High voltage, RF pulse power source for DBD-PA was developed and merchandized.
4) The acceleration mechanisms of DBD-PA were partly elucidated.
5) Increase jet velocities and operation temperatures are left in future study.
6) For MEL001 airfoil, closed loop active control system for separation of flow was testified successfully.
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Research Products
(24 results)
