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Pavel N. Kazanskii
The complex unsteady flow in cavities leads to the formation of large-scale disturbances in the shear layer. Natural closed-loop mechanisms provoke a dramatic increase in pressure pulsations and aerodynamic noise. This paper presents the experimental stu...
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Yoshiki Shima, Ryuya Imai, Hitoshi Ishikawa and Takehiko Segawa
Plasma actuators (PA) can be utilized as fluid control devices without moving parts, but further improvement in drive efficiency is necessary. Herein, string-type PAs with up to 12 insulated conductive wires were evaluated to replace sheet-type PAs havin...
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Tasuku Tanaka, Hisashi Matsuda, Toshiki Takahashi, Takahiro Chiba, Nobuyoshi Watanabe, Hideaki Sato and Masafumi Takeyama
Using a high-durability designed plasma electrode (PA), the plasma actuation effect on both a two-dimensional backward-facing step flow (standard model) and an arc-shaped three-dimensional backward-facing step flow (arc model) was investigated experiment...
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Kozo Fujii
Both computational and experimental studies are conducted for understanding of the flow separation control mechanism of a DBD (dielectric barrier discharge) plasma actuator. Low speed flows over an airfoil are considered. A DBD plasma actuator is attache...
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Takayuki Matsunuma
Because axial flow turbines are widely used as the main components of jet engines and industrial gas turbines, their energy reduction effect is significant, even with a slight performance improvement. These turbines operate over a wide range of Reynolds ...
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Shintaro Sato, Tomoki Yoshikawa and Naofumi Ohnishi
The low-voltage operation of a dielectric-barrier-discharge (DBD) plasma actuator with a simple electric circuit has the potential to put it into industrial applications. However, there is an issue that the efficiency of the low-voltage operated DBD plas...
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Zhou Shen, Beimeng Hu, Guozhan Li and Hongjun Zhang
The effects of the coolant pulsation and the plasma aerodynamic actuation (PAA) on the film cooling are herein explored via large eddy simulations. The electrohydrodynamic force derived from the PAA was solved through the phenomenological plasma model. T...
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Sergey Chernyshev, Gadzhi Gadzhimagomedov, Aleksandr Kuryachiy, Dmitry Sboev and Stepan Tolkachev
In a subsonic wind tunnel, a three-dimensional separation of a developed turbulent boundary layer was simulated on a swept wing flap model. A multi-discharge plasma actuator operating on the basis of dielectric barrier discharge was used to overcome the ...
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Alexander Kotvitskii, Pavel Kazanskii and Ivan Moralev
The pulse electric arc discharge in an external magnetic field is studied as a vortex generator in the subsonic boundary layer. A pulsed Ampere force induces a hairpin vortex near the wall; its structure depends on the relative direction of arc propagati...
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Hai Chen, Yan Zhou, Zhenbing Luo and Pan Cheng
With the aim of increasing the momentum jet and obtaining better environmental adaptability, this study designs a new type of actuator combining a sparkjet actuator and a combustion-driven actuator. Numerical simulation shows that the combustion-driven s...
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Rodrigo Viguera, Yoshiki Anzai, Yasuo Sasaki and Taku Nonomura
This paper presents the experimental results of separation and reattachment transient flow processes over a NACA0015 airfoil wing when using a plasma actuator for flow control. In addition, it addresses the flow behavior in the transient processes when t...
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Yoshiaki Abe, Taku Nonomura, Makoto Sato, Hikaru Aono and Kozo Fujii
This study numerically investigated the mechanisms of separation control using a synthetic jet (SJ) and plasma actuator (PA) around an NACA0015 airfoil at the chord Reynolds number of 63,000. Both SJ and PA were installed on the leading edge with the sam...
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Takayuki Matsunuma and Takehiko Segawa
In an axial-flow turbine of a jet engine used for aircraft propulsion, the passage vortex (PV) and tip leakage vortex (TLV) generated inside the blade passage deteriorate the aerodynamic performance. In this study, a dielectric barrier discharge plasma a...
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Amir Abdullaev, Alexander Kotvitskii, Ivan Moralev and Maxim Ustinov
Cancellation of the cross-flow vortices in a swept-wing boundary layer is attempted by plasma actuator array in numerical simulation. The response of the boundary layer to the stationary excitation by a single actuator section is measured experimentally ...
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Rubing Liu, Shenghui Xue, Wentao Wei, Qi Lin and Kun Tang
Conventional plasma synthetic jet actuators rely only on jet orifice for suction when functioning for long durations. A limited supplementary gas leads to jet velocity reduction and weakening of the flow control ability. Therefore, this study proposes an...
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Irina V. Mursenkova, Igor E. Ivanov, Yugan Liao and Igor A. Kryukov
This study presents an experimental and numerical investigation on a surface sliding discharge in a supersonic airflow in the presence of an oblique shock wave. In experiments, flow Mach numbers were 1.20?1.68 in the shock tube combined with the discharg...
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Takayuki Matsunuma and Takehiko Segawa
This study examined how various plasma actuator (PA) configurations affect the passage vortex (PV) reduction in a linear turbine cascade (LTC) utilizing dielectric barrier discharge PAs. The experiments were carried out under three specific layout condit...
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Satoshi Sekimoto, Kozo Fujii, Masayuki Anyoji, Yuma Miyakawa, Shinichiro Ito, Satoshi Shimomura, Hiroyuki Nishida, Taku Nonomura and Takashi Matsuno
In this study, an experimental investigation of separation control using a dielectric barrier discharge plasma actuator was performed on an NACA0015 airfoil over a wide range of Reynolds numbers, angles of attack, and nondimensional burst frequencies. Th...
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Qijie Sun, Xi Geng, Zheng Li, Zhiwei Shi, Zhikun Sun and Keming Cheng
Dielectric barrier discharge (DBD) has been one of the most promising techniques for flow control, but the practical application needs a large plasma surface. A three-electrode sliding discharge plasma actuator (SDPA) can generate plasma filling the inte...
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Asami Hatamoto, Kumi Nakai and Hiroyuki Nishida
A tri-electrode plasma actuator (TED-PA), which has an additional electrode with a DC voltage, induces jets from two facing electrodes and achieves larger thrust and higher efficiency than a conventional dielectric barrier discharge plasma actuator. Howe...
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