TOP > 外国特許検索 > Plasma actuator

Plasma actuator UPDATE

外国特許コード F200010130
掲載日 2020年5月22日
出願国 アメリカ合衆国
出願番号 202016735870
公報番号 20200221565
出願日 令和2年1月7日(2020.1.7)
公報発行日 令和2年7月9日(2020.7.9)
優先権データ
  • 特願2019-000603 (2019.1.7) JP
発明の名称 (英語) Plasma actuator UPDATE
発明の概要(英語) A small and inexpensive plasma actuator is capable of accelerating induced flow and increasing the effect of controlling flow. A plurality of electrode pairs are disposed on a dielectric layer upstream to downstream along a predetermined direction. Each electrode pair includes an upstream electrode disposed on one surface of the dielectric layer and a downstream electrode disposed on another surface of the dielectric layer to sandwich the dielectric layer between the upstream electrode. A lowest electrode is on the one surface of the dielectric layer displaced downstream from the downstream electrode in an the most downstream electrode pair to have the same potential as the downstream electrode. A voltage application device is configured to apply voltage including AC voltage or repeated pulse voltage to each electrode pair such that the potential of the applied voltage inverts at adjacent electrode pairs.
特許請求の範囲(英語) [claim1]
1. A plasma actuator comprising:
a dielectric layer;
a plurality of electrode pairs disposed on the dielectric layer upstream to downstream in a predetermined direction along one surface of the dielectric layer;
a lowest electrode disposed on the dielectric layer on a downstream side of each of the plurality of electrode pairs; and
voltage application means configured to apply voltage including AC voltage or repeated pulse voltage to each of the plurality of electrode pairs,
each of the plurality of electrode pairs including:
an upstream electrode disposed closer to one surface of the dielectric layer; and
a downstream electrode disposed closer to another surface of the dielectric layer and displaced downstream from the upstream electrode so as to sandwich the dielectric layer between the upstream electrode,
wherein, in adjacent electrode pairs, the upstream electrode of the downstream electrode pair is displaced downstream from the downstream electrode of the upstream electrode pair,
wherein the lowest electrode is disposed closer to the one surface of the dielectric layer and displaced downstream from the downstream electrode in a most downstream electrode pair so as to have the same potential as the downstream electrode in the most downstream electrode pair, and
wherein the voltage application means is configured to apply the voltage such that polarity of the applied voltage is inverted at adjacent electrode pairs.

[claim2]
2. The plasma actuator according to claim 1, wherein the voltage application means is configured to, when applying the voltage to either of the upstream electrode or the downstream electrode in each of the plurality of electrode pairs, ground the other of the upstream electrode or the downstream electrode in each of the plurality of electrode pairs.

[claim3]
3. The plasma actuator according to claim 1, wherein the voltage application means is configured to, when applying the voltage between the upstream electrode of an odd-numbered electrode pair from the upstream side and the downstream electrode of an even-numbered electrode pair from the upstream side, ground the downstream electrode in an odd-numbered electrode pair from the upstream side and the upstream electrode in an even-numbered electrode pair from the upstream side and/or configured to, when applying the voltage between the downstream electrode of an odd-numbered electrode pair from the upstream side and the upstream electrode of an even-numbered electrode pair from the upstream side, ground the upstream electrode in an odd-numbered electrode pair from the upstream side and the downstream electrode in an even-numbered electrode pair from the upstream side.

[claim4]
4. The plasma actuator according to claim 1, wherein the voltage is voltage obtained by superimposing the AC voltage or the repeated pulse voltage with DC voltage.

[claim5]
5. The plasma actuator according to claim 4, wherein:
the voltage application means includes a DC power supply, a first switch, and a second switch; and
the voltage application means is configured such that either of the upstream electrode and the downstream electrode in each of the electrode pairs is electrically coupled to the DC power supply via the first switch and grounded via the second switch, the other of the upstream electrode and the downstream electrode in each of the electrode pairs is grounded, and an operation in which the first switch is turned on and the second switch is turned off, and the first switch is turned off and the second switch is turned on is repeated.

[claim6]
6. The plasma actuator according to claim 4, wherein:
the voltage application means includes a DC power supply, a first switch, a second switch, a third switch, and a fourth switch; and
the voltage application means is configured such that either of the upstream electrode and the downstream electrode in each of the electrode pairs is electrically coupled to the DC power supply via the first switch and grounded via the second switch, the other of the upstream electrode and the downstream electrode in each of the electrode pairs is electrically coupled to the DC power supply via the third switch and grounded via the fourth switch, and an operation in which the first switch and the fourth switch are turned on and the second switch and the third switch are turned off, and the first switch and the fourth switch are turned off and the second switch and the third switch are turned on is repeated.

[claim7]
7. A plasma actuator comprising:
a dielectric layer;
an upstream electrode disposed closer to one surface of the dielectric layer;
a downstream electrode disposed closer to another surface of the dielectric layer and displaced downstream from the upstream electrode so as to sandwich the dielectric layer between the upstream electrode;
a lowest electrode disposed closer to the one surface of the dielectric layer and displaced downstream from the downstream electrode so as to have the same potential as the downstream electrode; and
voltage application means configured to apply voltage including AC voltage or repeated pulse voltage to either of the upstream electrode and the downstream electrode and, when the voltage is applied to one of the upstream electrode and the downstream electrode, ground the other of the upstream electrode and the downstream electrode.

[claim8]
8. The plasma actuator according to claim 1, wherein:
the upstream electrode and the lowest electrode are divided into a pair of separated electrodes aligned in the predetermined direction; and
a separated electrode on an upstream side or a downstream side in each pair of separated electrodes is coupled to a resistor.
  • 発明者/出願人(英語)
  • OHNISHI NAOFUMI
  • SATO SHINTARO
  • TOHOKU UNIVERSITY
国際特許分類(IPC)
ライセンスをご希望の方、特許の内容に興味を持たれた方は、下記「問合せ先」までご連絡ください。

PAGE TOP

close
close
close
close
close
close