Article
Engineering, Electrical & Electronic
Huifeng Miao, Zhibo Zhang, Yun Wu, Yangyang He, Yinghong Li
Summary: This study introduces a novel self trigger three-electrode plasma synthetic jet actuator that can extend the electrode distance with low breakdown voltage, leading to higher precursor shock velocity and discharge efficiency compared to traditional PSJA.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Computer Science, Information Systems
Xin Wang, Jie Yan, Jaspreet Singh Dhupia, Xiaosong Zhu
Summary: This article demonstrates the effectiveness of PSJA in the flapless control system by studying the characteristics of the aviation actuator and its influence on the air field around the aircraft.
Article
Engineering, Mechanical
Yoshiaki Abe, Taku Nonomura, Makoto Sato, Hikaru Aono, Kozo Fujii
Summary: This study investigated the mechanisms of separation control using a synthetic jet (SJ) and plasma actuator (PA) on an NACA0015 airfoil. Large-eddy simulations (LES) showed that there were four main differences in the induced flows of the SJ and the PA, but both methods exhibited a common feature of better recovering the lift-to-drag ratio in the frequency range of F (+) = 6.0-20.
Article
Engineering, Aerospace
Marcin Kurowski, Ryszard Szwaba
Summary: This study presents the results of experimental and numerical investigations on synthetic jet actuators with different arrangements. The promising results show an increase in output velocity and vorticity in the context of separation control by the modified arrangement.
JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Ru-bing Liu, Xiao-yin Mei, Sheng-hui Xue, Yu-wen Lu, Zhe-zhe Su, Qi Lin
Summary: In this study, a serial two-electrode plasma synthetic jet (PSJ) actuator array was used to actively control the flow field in the S-duct of an aircraft engine. The results showed that the PSJ significantly improved the wall pressure recovery coefficient, suppressed flow separation, and improved outlet pressure distortion. The best jet control position was near the separation location, and the best jet configuration was the '?' shape. Higher jet momentum coefficient and excitation frequency led to better flow control.
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
(2022)
Article
Engineering, Aerospace
Ming Xue, Zhangsong Ni, Chao Gao, Bin Wu, Borui Zheng
Summary: A tri-electrode dielectric barrier discharge plasma actuator is proposed to achieve a deflected synthetic jet by changing the polarity and magnitude of the direct current component. The experiment results show that different discharge modes induce different vortices, resulting in different jet deflection effects.
Article
Mechanics
Xi Geng, Weilin Zhang, Zhiwei Shi, Zheng Li, Qijie Sun, Zhikun Sun
Summary: The frequency characteristics of nanosecond plasma synthetic jet actuators were studied using the high-speed Schlieren method, revealing three typical working states: continuous, critical, and discontinuous. The relationship between discharge frequency and actuation states was discussed, defining critical and saturated discharge frequencies, and exploring the effects of geometric parameters on frequency characteristics.
Article
Mechanics
Zeinab Zavarian, G. R. Abdizadeh, Sahar Noori
Summary: This paper presents a numerical study on the effect of four key parameters on flow control around a wind turbine airfoil. The results show that the location of the DBD actuator, as well as the power and length of the momentum jet, have significant effects on flow control, leading to smaller vortices and lower drag coefficient.
Article
Engineering, Mechanical
Lianshan Lu, Dong Li, Zhenhui Zhang, Yin Yang, Dawei Liu, Yang Tao, Bo Lu
Summary: This paper designs an acoustic synthetic jet actuator that can generate multiple jets with one diaphragm. The governing parameters are given by theoretical derivation and the velocity characteristics of the jets are measured, showing the applicability of this technology to turbulent boundary layer flow control.
Article
Engineering, Mechanical
Zuzana Antosova, Zdenek Travnicek
Summary: This paper investigates the active control of a continuous jet by using a concentrically placed annular synthetic jet. Experiments were conducted in different flow regimes with varying Reynolds numbers, showing the possibility of turbulence reduction through forcing in transitional jets, especially at Re = 2555. The results demonstrate a significant decrease in the ratio of turbulence intensities between forced and unforced jets.
Article
Engineering, Aerospace
Rubing Liu, Shenghui Xue, Wentao Wei, Qi Lin, Kun Tang
Summary: This study proposes an air-supplied actuator with a check valve externally connected to the cavity to improve its gas-supplying ability and jet performance. High-speed schlieren is employed to photograph the internal flow field of the discharge chamber, revealing that the inhalation airflow velocity of the jet orifice is doubled when the actuator is continuously working in the effective frequency band under the combined action of additional air supply from the check valve in the inhalation recovery stage. The results have important implications for the performance optimization of the air-supplied actuator.
Article
Engineering, Aerospace
Rubing Liu, Ruixin Lin, Guangce Lian, Shenghui Xue, Qi Lin
Summary: The study designed a multi-channel PSJ actuator driven by a four-stage Marx high-voltage generator, determining its basic discharge characteristics and jet performance, and explored the effect of discharge frequency on jet performance through theoretical analysis and experimental research.
Article
Mechanics
Chenguang Lai, Liangkui Tan, Shigeru Obayashi
Summary: This study investigates the aeroacoustic control mechanism of a plasma jet on a high-speed moving wing under a wing-in-ground effect. The results show that different plasma excitation modes interfere with the vortex generation and development in different ways to achieve aeroacoustic reduction. The modal analysis reveals that the change in each order of the modal corresponds to the energy decrease at the peak frequency and the energy increase at high frequencies.
Article
Nanoscience & Nanotechnology
Shintaro Sato, Tomoki Enokido, Naofumi Ohnishi
Summary: A new concept of electrode shape and arrangement is proposed for developing a multi-stage plasma synthetic jet actuator that can operate at low voltage, producing uniform discharge and unidirectional ionic wind. Particle image velocimetry measurements show that the wall-normal jet induced by the actuator is characterized as an axisymmetric free shear flow.
Article
Thermodynamics
Jun-Lin Chen, Ying-Hao Liao
Summary: This study experimentally investigates flow interactions downstream of a bluff-body incorporated with an annular plasma actuator. It is found that square wave operation of the actuator leads to stronger discharge and more significant flow effects. The formation of a vortex ring downstream of the bluff-body is shown to have a positive impact on flow control and flame stabilization.
APPLIED THERMAL ENGINEERING
(2021)
Article
Physics, Applied
Banghuang Cai, Huimin Song, Zhibo Zhang, Min Jia, Weizhen Wang, Dong Lin
Summary: This paper presents a C-shape embedded multi-channel plasma igniter (CEMPI) and compares it with traditional spark igniters (SI). It is found that increasing air flow can shorten the ignition delay caused by flame stagnation, improve flame propagation speed, and facilitate fast ignition. CEMPIs can produce larger and more powerful fire kernels, penetrate deeper into the central recirculation zone, and have a faster flame propagation speed, significantly reducing ignition time. Additionally, CEMPI widens the lean ignition boundary and shows a more significant ignition advantage when air flow is small.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
Dong Lin, Min Jia, Zhibo Zhang, Huimin Song, Wei Cui, Weizhen Wang, Banghuang Cai
Summary: This study investigated the ignition performance of a multichannel gliding arcs (MGA) system under extreme conditions and found that the 3-channel and 5-channel gliding arcs generated more averaged power than the 1-channel gliding arc at a constant air velocity. The MGA system can ignite faster, continuously inject energy, and ultimately produce a larger flame area.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Aerospace
Huifeng Miao, Zhibo Zhang, Min Jia, Yun Wu, Wei Cui, Yi Chen, Yinghong Li
Summary: A novel multichannel jet enhanced plasma ignition strategy is proposed to improve ignition efficiency and energy by using plasma synthetic jet to enhance spark discharge. The MJEPI significantly enlarges the initial flame kernel, extends lean ignition limit, and reduces ignition time during the ignition process.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Min Jia, Zhibo Zhang, Wei Cui, Huimin Song, Zhangkai Huang
Summary: A Gliding Arc Plasma Jet Igniter (GAPJI) is designed to generate initial flame kernels with deeper penetration for successful ignition at high altitude. The GAPJI demonstrates higher penetration and discharge power, extending the lean ignition limit and enhancing combustion.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Engineering, Chemical
Min Jia, Yinxiang Zang, Wei Cui, Dong Lin, Zhibo Zhang, Huimin Song
Summary: In this study, a plasma-actuated flame holder was designed and its aerodynamic effects and ignition performance were investigated. The results showed that increasing the number of discharge channels and frequencies can improve the performance of the flame holder. Additionally, the plasma-actuated flame holder can significantly improve combustion efficiency under different temperature conditions.
Article
Physics, Fluids & Plasmas
Yinxiang Zang, Min Jia, Zhibo Zhang, Wei Cui
Summary: In a scramjet engine, the ignition is challenging due to the increased viscosity of kerosene, decreased oxygen content, and reduced flame propagation speed at low total temperature. This article proposes the use of gliding arc plasma as a stable high-temperature heat and chemical reaction source to enhance ignition in scramjet engines. The research focuses on the discharge characteristics of the gliding arc plasma igniter and the cracking properties of kerosene. The results indicate that the gliding arc igniter achieves higher average power in air than in nitrogen environment, and the concentration of cracking products is higher in air with hydrogen being the dominant component.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Physics, Fluids & Plasmas
Yangyang He, Jian Wang, Xin Chen, Huifeng Miao, Yun Wu, Zhibo Zhang
Summary: Studied the performance differences of nylon and Teflon as insulation materials for synthetic jet actuators. Found that nylon and Teflon materials undergo ablation after ionization, resulting in faster jet velocity and longer jet duration. Teflon actuator had larger affected area and higher jet velocity than other actuators.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2022)
