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Discharge and flow characterizations of the double-side sliding discharge plasma actuator

Chinese Physics B 2020年第6期29卷 274-285页

作者： Qi-Kun He Hua Liang Bo-Rui Zheng Science and Technology on Plasma Dynamics Laboratory Air Force Engineering UniversityXi’an 710038China School of Automation and Information Xi’an University of TechnologyXi’an 710048China

We investigate the discharge and flow characterizations of a double-side siding discharge plasma actuator driven by different polarities of direct current(DC)*** discharge tests show that sliding discharge and extended discharge are filamentary *** irregular current pulse of sliding discharge fluctuates obviously in the first half cycle,ultimately expands the discharge *** instantaneous power and average power consumptions of sliding discharge are larger than those of the extended discharge and dielectric barrier discharge(DBD).The flow characteristics measured by a high-frequency particle-image-velocimetry system together with high-speed schlieren technology show that the opposite jet at the bias DC electrode is induced by sliding discharge,which causes a bulge structure in the discharge *** bias DC electrode can deflect the direction of the induced jet,then modifying the properties of the boundary *** discharge can accelerate the velocity of the starting vortex,improving the horizontal velocity profile by 203%.The momentum growth caused by extended discharge has the largest peak value and the fastest growth rate,compared with sliding discharge and ***,the momentum growth of sliding discharge lasts longer in the whole pulsed cycle,indicating that sliding discharge can also inject more momentum.

关键词： plasma double-side sliding discharge induced velocity induced vortex momentum analysis

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Numerical investigation of the control factors driving Zhe-Min Coastal Current

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Acta Oceanologica Sinica 2022年第2期41卷 127-138页

作者： Yang Zhang Fei Chai Joseph Zhang Yang Ding Min Bao Yunwei Yan Hong Li Wei Yu Liang Chang State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China School of Marine Sciences University of MaineOronoME 04469USA Virginia Institute of Marine Science College of William&Mary Center for Coastal Resource ManagementWilliamsburgVA 23185USA Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100China Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China

During the northeast monsoon season,Zhe-Min Coastal Current(ZMCC)travels along the Chinese mainland coast and carries fresh,cold,and eutrophic *** is significantly important for the hydrodynamic processes and marine ecosystems along its ***,this bottom-trapped plume deserves to be further discussed in terms of the major driving factor,for which different opinions *** this purpose,in this study,a high resolution Semi-implicit Cross-scale Hydroscience Integrated System Model(SCHISM)is established and *** correlation coefficients exist between along-shelf wind speeds and seasonal variations of both ZMCC volume transport and the freshwater *** coefficients imply that the wind is important in regulating ***,for similar annual mean ZMCC volume transports,the extreme south boundaries of Zhe-Min Coastal Water(ZMCW)are different among different *** difference is attracting attention and is explored in this *** to the low wind/discharge experiment,it was found that although the volume transport of ZMCC is more sensitive to the variation of local wind speeds,the carried freshwater is limited by the Changjiang River discharge,which ultimately determines the south boundary of *** momentum analysis at transects I and II shows that,for driving ZMCC,the along-shore wind forcing is as important as the buoyancy *** that this conclusion is supported by a zero-discharge *** was also found that the buoyancy forcing varies with respect to time and space,which is due to variations of the discharge of Changjiang *** addition,a particle tracking experiment shows that the substance carried by the Changjiang River diluted water would distribute along the Zhe-Min coastal region during the northeast monsoon season and it may escape due to the wind relaxation.

关键词： coastal current numerical model momentum analysis Changjiang River diluted water East China Sea

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