Article
Physics, Applied
Huifeng Miao, Zhibo Zhang, Yun Wu, Wei Cui, Yinghong Li
Summary: A novel semiconductor enhanced plasma synthetic jet actuator (SEPSJA) with reduced driving voltage and improved jet performance is proposed in this study, showing better efficiency and higher jet velocity compared to traditional PSJA. The SEPSJA is worth further exploration in the field of flow control.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
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
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
Thermodynamics
Yuan-wei Lyu, Jing-zhou Zhang, Jing-yang Zhang, Yong Shan
Summary: This study uses experimental measurement and numerical simulation to reveal the variation of flow field during the issuing of a Plasma Synthetic Jet (PSJ) actuator. It is found that the high-pressure zone generated by plasma deposition shifts reciprocally between the bottom and top of the cavity. The pressure inside the cavity and the velocity of the PSJ attenuate while oscillating in real-time. The geometry of the actuator significantly affects the performance of the PSJ.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Aerospace
Max Huber, Andreas Zienert, Perez Weigel, Martin Schuller, Hans-Reinhard Berger, Joerg Schuster, Thomas Otto
Summary: This paper analyzes and optimizes synthetic jet actuators (SJAs) using a known one-dimensional analytical model. It found a power law describing the coupling between diaphragm resonance frequency and cavity volume, and calculated optimal orifice dimensions based on cavity height in agreement with literature. A transient oscillation correction is necessary for accurate simulation outcomes.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2021)
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
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
Optics
Ye Yuan, Yan Zhang, Cheng Guo, Xiaolu Kang, Zhong Yan, Xiaoping Huang, Qing Zhao
Summary: A new optical analysis method for plasma characterization is proposed in this paper. Instead of using the complex spectral diagnosis method, plasma characteristics are obtained directly by measuring the plasma luminous color. The corresponding relationship of electron temperature, electron density data points, and luminous color is established and analyzed. The research results indicate that this optical analysis method is feasible and promising for fast plasma characterization.
CHINESE OPTICS LETTERS
(2022)
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
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, Fluids & Plasmas
Borui Zheng, Qian Zhang, Taifei Zhao, Guozheng Song, Quanlong Chen
Summary: A self-supplementing, dual-cavity, plasma synthetic jet actuator (SD-PSJA) is designed to solve the performance attenuation issue of the plasma synthetic jet actuator (PSJA) at high frequencies. Experimental and numerical simulation results show that the SD-PSJA has two saturation frequencies, and both decrease as the volume of the bottom cavity increases. The SD-PSJA can effectively improve the jet intensity at high frequencies by reducing the refresh time through supplementing air to the top cavity via two holes.
PLASMA SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Baris Gungordu, Mark Jabbal, Atanas A. Popov
Summary: This study investigates the effect of using different types of piezoceramics and different orifice-diaphragm configurations on the performance of synthetic jet actuators. The results show that the use of PMN-PT piezoceramic leads to higher displacement and jet velocity compared to conventional PZT-5A piezoceramic. A peak exit jet velocity of 99.5 m/s was obtained at a low voltage supply of 40 V. The power conversion efficiency achieved was 72% and a new figure-of-merit of 0.09 MW-1 was defined to evaluate the potential impact for full-scale implementation.
Article
Engineering, Aerospace
TianXiang Gao, Zhen Bing Luo, Yan Zhou, Sheng Ke Yang
Summary: A novel de-icing strategy combining electric-heating with plasma synthetic jet actuator is proposed in this article, aiming to reduce energy consumption and accelerate the de-icing process. By using electric-heating to remove adhesion force and then applying force with a plasma synthetic jet actuator to fracture the ice, the ice layer can be divided into smaller blocks efficiently.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Engineering, Mechanical
Ying Kang, Zhenbing Luo, Xiong Deng, Yinxin Zhu, Zhixun Xia
Summary: This paper proposes a novel liquid cooling device based on DSJA technology, which efficiently cools the chip. The characteristics of temperature and velocity field of the device are studied numerically, and the entropy generation rate caused by heat transfer and fluid friction is analyzed. The results show that the device effectively reduces temperature and increases velocity, while the frictional entropy generation is mainly distributed near the inlet, outlet, and jet orifice of the channel, and becomes more noticeable with higher velocity.
Article
Engineering, Mechanical
Pawel Gil, Joanna Wilk
Summary: The paper presents preliminary results of an experimental investigation involving four different loudspeakers used for driving a synthetic jet actuator. Parameters like synthetic jet velocity, cavity pressure, sound pressure level (SPL) and heat sink thermal resistance were studied under various input power and driving frequency conditions. The highest synthetic jet momentum velocity and maximum sound pressure level were achieved at diaphragm resonance frequency. Heat sink thermal resistance was lowest for a specific loudspeaker, and synthetic jet velocity reached a maximum for this actuator. Sound pressure level for all tested actuators was found to be dependent on momentum velocity.
Article
Engineering, Mechanical
G. Arroyo-Callejo, E. Laroche, P. Millan, F. Leglaye, F. Chedevergne
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
(2016)
Article
Thermodynamics
F. Chedevergne
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
(2018)
Article
Engineering, Mechanical
Sylvain Morilhat, Francois Chedevergne, Frank Simon
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
(2019)
Article
Mechanics
Francois Chedevergne, Yann Marchenay
JOURNAL OF TURBULENCE
(2019)
Article
Engineering, Mechanical
Sylvain Morilhat, Francois Chedevergne, Francis Micheli, Frank Simon
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
(2020)
Article
Mechanics
D. Toussaint, F. Chedevergne, O. Leon
Article
Thermodynamics
Olivier Leon, Philippe Reulet, Francois Chedevergne
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
(2020)
Article
Mechanics
F. Chedevergne, P. Forooghi
JOURNAL OF TURBULENCE
(2020)
Article
Mechanics
Y. Marchenay, F. Chedevergne, M. Olazabal Loume
Summary: A new modeling strategy is proposed to predict the combined effects of roughness and blowing boundary conditions. Analysis of experimental data reveals deficiencies in existing roughness corrections when predicting the effect of blowing in the presence of surface roughness.
Article
Mechanics
F. Chedevergne
Summary: The article revisits the discrete element (roughness) method developed a few decades ago, and applies it to the double-averaging technique, deriving a k-omega-based DANS turbulence model. The notion of representative elementary roughness is introduced to reconcile the discrete element (roughness) method with the double-averaged Navier-Stokes equations. Validation using a large dataset from various DNS configurations shows the overall excellent behavior of the proposed DANS model.
JOURNAL OF TURBULENCE
(2021)
Article
Mechanics
A. Colombie, E. Laroche, F. Chedevergne, R. Manceau, F. Duchaine, L. Gicquel
Summary: This study uses large-eddy simulation to evaluate the Reynolds-stress budgets of a round impinging jet, focusing on the stagnation region where pressure terms dominate the budgets and balance the Reynolds-stress production and convective fluxes. The study highlights the role of pressure diffusion term in conveying energy to the wall and explains the failure of turbulence models due to inadequate modeling of this term.
Article
Engineering, Aerospace
Y. Marchenay, M. Olazabal Loume, F. Chedevergne
Summary: This study focuses on the modeling and simulation of roughness and blowing effects in hypersonic turbulent boundary layers. By comparing with experimental data, it is found that the combination of Zeman compressibility correction and roughness/blowing wall corrections shows promise for simulating hypersonic boundary layers over rough walls with blowing.
JOURNAL OF SPACECRAFT AND ROCKETS
(2022)
Article
Mechanics
F. Chedevergne
Summary: The discrete element method was revisited using a double averaged Navier-Stokes formulation and a new closure relation for the drag coefficient. The developed model is based on the notion of representative elementary roughness, and a procedure was proposed to compute the blockage factor and the elementary diameter of randomly distributed rough configurations. Computed velocity profiles matched experimental results and demonstrated the relevance of the procedure and the validity of the double averaged Navier-Stokes model across different rough regimes.
JOURNAL OF TURBULENCE
(2023)
Article
Engineering, Aerospace
F. Laurendeau, O. Leon, F. Chedevergne, J. -M. Senoner, G. Casalis
Article
Mechanics
M. Bouyges, F. Chedevergne, G. Casalis, J. Majdalani
JOURNAL OF FLUID MECHANICS
(2017)