PLASMA ACTUATOR

• Main Authors: AKIMOTO MASATO, KIMURA MOTOAKI
• Format: Patent
• Language: English; Japanese
• Published: 17.01.2019
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To provide a plasma actuator which efficiently diffuses a jet flow.SOLUTION: A plasma actuator includes a pair of electrodes, a dielectric body arranged between the electrodes, a voltage applying device which applies a voltage to the electrodes and a voltage controlling part which controls application of the voltage to the electrodes by means of the voltage applying device. Therein, the voltage controlling part repeats an application period for controlling application of a voltage to the electrodes and performing control of a first state, a limit non-application period for performing control of a second state only for a time in which shear is not generated in an air flow produced in the application period, after the application period, a plurality of short application periods for performing the control of the first state only for a time shorter than the application period and a non-application period for performing the control of the second state of the number in accordance with the number of the short application periods, by using the first state in which the voltage is applied to the electrodes and the second state in which the voltage is not applied to the electrodes or a voltage lower than the voltage applied on the electrodes is applied in the first state.SELECTED DRAWING: Figure 1 【課題】噴流を効率よく拡散するプラズマアクチュエータを提供する。【解決手段】プラズマアクチュエータは、一対の電極と、前記電極の間に配置される誘電体と、前記電極に電圧を印加する電圧印加装置と、前記電圧印加装置による前記電極への電圧の印加を制御する電圧制御部と、を備え、前記電圧制御部は、前記電極に電圧を印加する第１状態と、前記電極に電圧を印加しない、又は前記第１状態において前記電極に印加する電圧より低い電圧を前記電極に印加する第２状態とによって、前記電極への電圧の印加を制御し、前記第１状態の制御を行う印加期間と、前記印加期間の後に前記印加期間において発生される気流にせん断が生じない時間だけ前記第２状態の制御を行う限定非印加期間と、前記印加期間より短い時間だけ前記第１状態の制御を行う複数の短印加期間と、前記短印加期間の数に応じた数の前記第２状態の制御を行う非印加期間とを繰り返す。【選択図】図１