Article
Engineering, Aerospace
Jianyang Yu, Yuhang Lu, Yabo Wang, Fu Chen, Yanping Song
Summary: This paper experimentally studies the effects of dielectric barrier discharge (DBD) plasma actuators (PAs) on the leakage flow structures and loss in a turbine cascade. The results show that the DBD plasma actuators can weaken the strength of the tip leakage flow near the casing, and this effect is influenced by the actuation strength and attack angle.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
F. Rodrigues, M. Abdollahzadeh, J. C. Pascoa, P. J. Oliveira
Summary: The novel design of the segmented dielectric barrier discharge (DBD) actuator/sensor allows for improved deicing performance and the detection of ice formation, location, and melting process.
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Aerospace
Yun Wu, Biao Wei, Hua Liang, Like Xie, Zhe LI, Yinghong LI
Summary: This research proposes a method of using distributed plasma to modulate ice shape, significantly improving aerodynamic performance and flight safety while saving power consumption for aircraft. Experimental results show that ice shape modulation can create a wavy leading edge, providing better improvements in flight characteristics compared to continuous ice.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Engineering, Aerospace
Pavel N. Kazanskii
Summary: This paper presents an experimental study on pressure fluctuations in closed-loop control in rectangular cavities using plasma dielectric barrier discharge. The results show that modulation of discharge frequency can increase or decrease the peak amplitude of pressure fluctuations.
Article
Chemistry, Multidisciplinary
Viktoras Papadimas, Christos Doudesis, Panagiotis Svarnas, Polycarpos K. Papadopoulos, George P. Vafakos, Panayiotis Vafeas
Summary: The study has developed a single dielectric barrier discharge-based actuator that is energy-efficient and stable, suitable for different aerodynamic profiles. Experimental results show that the average gas temperature above the actuator surface is around 400K, with fluid velocity reaching up to 4.5m/s, and a laminar flow layer less than 1.5mm thick is observed on the actuator surface.
APPLIED SCIENCES-BASEL
(2021)
Letter
Engineering, Mechanical
Rasool Kayvanpour, Sahar Noori, Peiman Sepahvand
Summary: This study investigates the impact of DBD plasma actuators on the flow over a pitching NACA 0012 airfoil. The effects of the plasma actuator on aerodynamic coefficients and dynamic stall are analyzed. The optimal location and variations in voltage and frequency are also explored. The accuracy of the results is validated against numerical and experimental data.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Engineering, Environmental
Hiresh Moradi, Dong-Su Kim, Se-Hee Kim, Yoon-Young Chang, Jae-Kyu Yang, Eun-Ha Choi, Telma Kamranifard
Summary: This study used experimental and numerical analyses to model and optimize the degradation and mineralization of the pesticide diazinon using non-thermal atmospheric pressure plasma. Factors such as the initial concentration of diazinon, pH of the medium, and flow rate of the plasma feeding gas were considered. It was found that the gas composition and flow rate had significant effects on the type and concentration of reactive nitrogen and oxygen species generated. The study also identified the importance of gas flow rate in total organic carbon (TOC) removal. The energy yield of the treatment procedure was high, suggesting the potential of plasma for treating diazinon-polluted water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Physics, Applied
Huw Borradaile, Konstantinos Kourtzanidis, Francois Rogier, Kwing-So Choi, Xuerui Mao
Summary: The study shows that the reversal of flow direction in millimetric annular dielectric barrier discharge (DBD) plasma actuators is induced by disproportionate reduction of the negative radial electrohydrodynamic forcing component during the positive sub-cycle. Factors influencing this flow reversal include the thickness of the electrode and the ambient oxygen content via similar discharging mechanisms.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Jun Deng, Ping Wang, Ying Sun, Junjie Zhou, Yanchun Luo, Dianwei He
Summary: By designing a dual swirl combined DBD plasma combustor head, the combustion performance of an aero-engine combustor under high altitude, high humidity, and other adverse conditions was significantly improved. Through discharge experiments and studying the characteristics at different humidity levels, it was demonstrated that the new combustor could stably and continuously produce a large number of active particles, resulting in increased combustion efficiency.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Aerospace
Mengxiao Tang, Yun Wu, Hongyu Wang
Summary: In this paper, experimental research is conducted to study the hypersonic shock-shock interaction control using plasma actuator array, aiming to explore a new surface thermal protection method for hypersonic aircraft. The results show that the plasma actuator array can effectively control the shock-shock interaction system, and increasing energy deposition has a positive impact on the control outcome.
Article
Chemistry, Analytical
Ernest Gnapowski, Jaroslaw Pytka, Jerzy Jozwik, Jan Laskowski, Joanna Michalowska
Summary: The experimental research conducted on the SD 7003 wing model with a plasma actuator showed promising results in controlling the boundary layer and increasing lift, even at high angles of attack. The unique structure of the plasma actuator used in the experiments allowed for a 5% increase in lift coefficient, demonstrating the effectiveness of the new electrode design.
Article
Chemistry, Multidisciplinary
Wentao Li, Zhiyuan Geng, Henglin Xiao, Yaoyao Pei, Kang Yang
Summary: This study analyzes the ice accumulation problem on high-density polyethylene stay cables under different conditions. The results show that ambient temperature, cable inclination angle, and diameter significantly affect ice accumulation. Low temperature promotes icicle formation and growth, while larger size and inclination angle of the cable inhibit icicle growth. When the cable inclination angle is less than 60 degrees, icicles easily form at the bottom of the cable. Smaller-diameter cables are more likely to accumulate icicles at the bottom.
APPLIED SCIENCES-BASEL
(2023)
Article
Nanoscience & Nanotechnology
Haitao Wang, Zhongyu Hou, Changlin Li, Bo Wang
Summary: Research in plasma actuation is focusing on enhancing thrust density for aerodynamic flow control. A new method involving nanoscaled structures and voltage/frequency tuning has been proposed and experimentally evaluated. Results show a 78% increase in thrust with nanostructures, but a threshold effect with lower voltages and frequencies impacting thrust generation. Electric characteristics are not sensitive to nanostructures, demonstrating the effectiveness of incorporating nanoscaled structures into DBD plasma actuators to improve mechanical performance.
Article
Thermodynamics
A. Daliri, M. J. Maghrebi, M. R. Soltani
Summary: The study evaluates the boundary-layer control ability of a DBD plasma actuator using surface mounted hot-film sensors in wind tunnel experiments on a wind-turbine blade section. Two distinct boundary-layer states are recognized, one influenced by low-frequency instabilities of the separated flow near deep stall, and the other influenced by both leading edge and trailing edge shear-layer instabilities and natural trailing edge vortex shedding near the static stall angle of attack.
JOURNAL OF APPLIED FLUID MECHANICS
(2021)
Article
Engineering, Environmental
Yinyin Zhang, Han Zhang, Ai Zhang, Paul Heroux, Zhuyu Sun, Yanan Liu
Summary: Dielectric barrier discharge (DBD)-biochar sequential batch experimental technology was used to degrade atrazine (ATZ) in soil. DBD treatment increased the hydrophilicity, particle size, and instability of soil particles, leading to the exposure of residual ATZ. Biochar introduction compensated for the shortcomings of sole DBD treatment and enhanced ATZ removal efficiency. Proposed ATZ degradation mechanisms included various reactions, such as dealkylation, dechloro-hydroxylation, and alkylic-oxidation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Aerospace
Afaq Ahmed Abbasi, Huaxing Li, Xuanshi Meng
Article
Engineering, Aerospace
Cem Kolbakir, Haiyang Hu, Yang Liu, Hui Hu
AEROSPACE SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Aerospace
Zichen Zhang, A. Lusi, Haiyang Hu, Xianglan Bai, Hui Hu
Summary: The study found that spraying Type-IV deicing fluid significantly degrades the performance of icephobic coatings, completely deteriorating their effectiveness for aircraft inflight icing mitigation.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Bo Li, Xuanshi Meng, Shiqing Yin, Weiwei Hui, Huaxing Li
Summary: A NACA0025 coflow jet airfoil model was designed and manufactured using 3D printing technology, and its flow characteristics and control mechanism were studied. Experimental results showed that the PCFJ airfoil had better performance in delaying flow separation in wind tunnel tests.
Article
Thermodynamics
Yihua Peng, Ramsankar Veerakumar, Zichen Zhang, Haiyang Hu, Yang Liu, Xuhui He, Hui Hu
Summary: The experimental study showed that utilizing a superhydrophobic surface coating on bridge cables can significantly reduce ice coverage and mass, as well as decrease aerodynamic drag forces. However, the effectiveness of the SHS coating in ice mitigation was found to be less effective under rime icing conditions, but it can reduce aerodynamic drag forces at the initial stage of the rime icing process.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2022)
Article
Mechanics
Weiwei Hui, Hexiang Zhang, Jianlei Wang, Xuanshi Meng, Huaxing Li
Summary: The coupling characteristics of the aerodynamic and thermal effects of a surface dielectric barrier discharge plasma actuator are studied experimentally in different boundary-layer flows. The results show strong coupling between the aerodynamic and thermal effects induced by plasma actuation. The temperature rise is consistent with the induced velocity field and is limited within the boundary-layer flows. In turbulent boundary-layer flows, the temperature is lower than in laminar flows, with a maximum temperature-rise difference exceeding 10 degrees C. In leading-edge separation-bubble flows, most heat generated by the plasma actuation is restricted inside the separation bubble.
Article
Thermodynamics
Haiyang Hu, Faisal Al-Masri, Linchuan Tian, Hui Hu
Summary: An experimental study was conducted to investigate the dynamic ice accretion process on a typical aeronautic Pitot probe model under different icing conditions. Different ice structures were observed to accrete on the probe surface depending on the icing condition. The study compared the 3D shapes of the ice structures, ice layer profiles, ice blockage, and total ice mass to understand the underlying icing physics.
JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
(2023)
Article
Mechanics
Weiwei Hui, Xuanshi Meng, Huanxing Li, Feng Liu
Summary: In this study, a pair of surface mounted dielectric-barrier-discharge (DBD) plasma actuators is placed on a circular cylinder model. The flow field generated by the actuators in different steady and duty-cycle actuation modes is measured and analyzed. The results show that as the frequency increases, the vortices generated by the actuators transform into steady jets.
Article
Engineering, Environmental
Nianhong Han, M. A. Siddique, Zichen Zhang, Linchuan Tian, Haiyang Hu, Hui Hu
Summary: A flight-testing campaign was conducted to examine the in-flight icing characteristics and its effects on the flight performance of a fixed-wing UAV. The results showed that the accumulation of ice on the exposed surfaces of the UAV, such as wings, fuselage, stabilizers, Pitot probe, and propeller, degraded the aerodynamic performance and increased power consumption. Inflight icing also caused structural vibrations and posed serious threats to flight safety.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Thermodynamics
Ramsankar Veerakumar, Linchuan Tian, Haiyang Hu, Yang Liu, Hui Hu
Summary: An experimental campaign was conducted to investigate the dynamic icing process and wind loads on an ACSR power cable under dry rime and wet glaze icing conditions. The icing process was recorded using high-resolution imaging, and the 3D shapes of the ice layers were quantified using a novel scanning system. The wind loads on the cable were measured using force/moment transducers and the evolution of the wake flow was analyzed using Particle Image Velocimetry (PIV). Differences were observed in the ice accretion and wind loads between the dry rime and wet glaze icing conditions.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
Article
Thermodynamics
Linchuan Tian, Linkai Li, Haiyang Hu, Hui Hu
Summary: An experimental campaign was conducted to study dynamic ice accretion on rotating aeroengine fan blades and evaluate its impact on fan rotor performance. The experiments revealed that ice accretion caused substantial degradation of the fan rotor, particularly under glaze icing conditions. The rougher blade surfaces due to ice accretion negatively affected the performance of the fan rotor. These findings are important for understanding fan performance and designing ice protection systems.
JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
(2023)
Article
Engineering, Aerospace
Haiyang Hu, Linchuan Tian, Hui Hu
Summary: An experimental study was conducted to examine the dynamic ice accretion process caused by microsized, airborne ice particles impinging onto a heated test surface. The study found that the ice accretion process consisted of three stages: ice-melting, ice/water mixture formation, and water refreezing. The formation of a liquid water film layer on the test surface was found to promote the sticking of impinged ice particles and enhance the growth of the water/ice layer.
Correction
Chemistry, Multidisciplinary
A. Lusi, Harish Radhakrishnan, Haiyang Hu, Hui Hu, Xianglan Bai
Article
Chemistry, Multidisciplinary
A. Lusi, Harish Radhakrishnan, Haiyang Hu, Hui Hu, Xianglan Bai
Article
Engineering, Aerospace
Haiyang Hu, Xuanshi Meng, Jinsheng Cai, Wenwu Zhou, Yang Liu, Hui Hu
JOURNAL OF AIRCRAFT
(2020)