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Characteristics of a pre-combustion plasma jet igniter

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Chinese Journal of Aeronautics 2024年第7期37卷 178-189页

作者： Jinlu YU Baowen ZHANG Yang YU bingbing zhao Lei ZHANG Aviation Engineering School Air Force Engineering UniversityXi’an 710038China Equipment Management and Unmanned Aerial Vehicle Engineering School Air Force Engineering UniversityXi’an 710038China

Plasma ignition technology has delivered good performance in the aerospace industry. In this study, a pre-combustion plasma jet igniter was designed, and its characteristics were examined from three aspects: the morphology, temperature, and discharge characteristics and process of ignition. Images of the OH distribution were obtained by using an OH Planar Laser-Induced Fluorescence(OH-PLIF) experimental system. Results have shown that the proposed plasma jet had a higher OH concentration, longer length, and larger area than those of a traditional igniter. The stability of discharge of the igniter was improved as the equivalence ratio φ was increased, and reducing gas flow reduced the pulsation of the plasma jet. When the input current was increased from 15A to 35 A, the highest average temperature increased from 5127 K to 7987 K. An increase in the equivalence ratio reduced the region of arc ionization, but expanded the regions of the core combustion reaction and the outer flame. Herein, this study has obtained a deep understanding of the jet and ignition law and developed a new idea for the application of plasma in the ignition field.A pre-combustion plasma jet igniter can significantly improve the efficiency of ignition and shorten the ignition process compared with a traditional igniter.

关键词： Pre-combustion plasma igniter Plasma Jet temperature field Ignition process Arc Flame

Antidepressant effect of Xingnao Jieyu decoction mediated by alleviating neuroinflammation in a rat model of post-stroke depression

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Journal of Traditional Chinese Medicine 2019年第5期39卷 658-666页

作者： Yan Yongmei Li Tao Wang Dou zhao bingbing Zhou Qi Department of Encephalopathy Affiliated hospital of Shaanxi University of Chinese Medicine

OBJECTIVE: To identify the antidepressant effect of Xingnao Jieyu (XNJY) decoction on a post-stroke depression (PSD) rat model and the underlying molecular mechanism. METHODS: We established a rat PSD model by middle cerebral artery occlusion (MCAO) combined with chronic unpredictable mild stress (CUMS). Healthy SD rats were randomly divided into six groups: sham, PSD, fluoxetine (Flu), and XNJY groups at low, middle, and high doses. The sham group underwent sham operation, while the other groups underwent MCAO+CUMS. The Flu and XNJY decoction groups were intragastrically administered with Flu or different doses of XNJY for 21 consecutive days. Histopathological changes in the cortex and hippocampus were observed by staining with hematoxylin and eosin and Terminal-deoxynucleoitidyl Transferase Mediated Nick End Labeling. Iba1 positive cells were evaluated by immunofluorescence assay. The expressions of tumor necrosis factor-α(TNF-α), interleukin-6 (IL-6), interleukin-1β(IL-1β), 5-hydroxytryptamine (5-HT), and norepinephrine (NE) in the cortex and hippocampus were measured by enzyme linked immunosorbent assay. RESULTS: The PSD group rats had a significant decrease in body weight, consumption of sucrose water, and locomotor activity but an increase in immobility time during a forced swimming test (P < 0.01) compared with sham group. Flu and different doses of XNJY significantly recovered these indices (P < 0.01). XNJY also inhibited neuronal damage and apoptosis in the cortex induced by PSD (P < 0.01). Furthermore, XNJY reduced the number of Iba1 positive cells and the expressions of TNF-α, IL-6, and IL-1β, in addition to recovered the levels of 5-HT and NE in the cortex and hippocampus (P < 0.01). CONCLUSION: The alleviation of neuroinflammation might be an important mechanism of the XNJY decoction against PSD. Thus, XNJY might be a promising candidate for the treatment of PSD.

关键词： Depression Stroke Infarction, middle cerebral artery Stress Inflammation Antidepressive agents Xingnao Jieyu

Relationship between inter-α-trypsin inhibitor heavy chain 4 and ovarian cancer

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Chinese Journal of Cancer Research 2019年第6期31卷 955-964页

作者： Min Huang Wei Zhang bingbing zhao Li Li Department of Gynecologic Oncology Affiliated Tumor Hospital of Guangxi Medical UniversityNanning 530021China Department of Gynecologic and Obstetrics The First Affiliated Hospital of Guilin Medical CollegeGuilin 541100China Guangxi Key Laboratory for Highincidence-tumor Prevention and Treatment Nanning 530021China

Objective:The inter-α-trypsin inhibitor heavy chain 4(ITIH4)protein is involved in the development of ***,the relationship between ITIH4 and ovarian cancer(OC)has not been extensively *** study aimed to explore the effect of ITIH4 on OC and to identify its underlying ***:Expressions of ITIH4 in OC tissues and cells were determined using quantitative reverse transcription polymerase chain reaction(RT-qPCR)and western *** function of ITIH4 in the OC cell line HO8910 pm was tested via ITIH4 *** cell growth rate was measured using MTT and colony formation *** cytometry was performed to evaluate cell cycle *** migration and invasion abilities were observed using the transwell migration ***:ITIH4 was downregulated in OC tissues and ***4 knockdown promoted cell growth and cell cycle *** with these results,inhibition of ITIH4 in OC cells significantly increased cell migration and invasion *** regression analysis suggests that ITIH4 expression alone is not a good predictor of the prognosis of malignant ovarian tumors in ***:ITIH4 inhibits the progression of OC,suggesting that ITIH4 may be a useful biomarker for *** study may provide a potential novel target for the treatment of OC.

关键词： Ovarian cancer inter-α-trypsin inhibitor H4 protein quantitative reverse transcription PCR RNAi

Effects of Dielectric Barrier Discharge Plasma on the Combustion Performances of Reverse-Flow Combustor in an Aero-Engine

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Journal of Thermal Science 2019年第5期28卷 1035-1041页

作者： DENG Jun PENG Changxin HE Liming WANG Shuai YU Jinlu zhao bingbing Science and Technology on Plasma Dynamics Laboratory Air Force Engineering University Xi'an 710038 China AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412002 China

In order to apply plasma assisted combustion(PAC) into a reverse-flow aero-engine and verify the improvement of combustion performance, a feasible approach was proposed in this work. In this approach, based on the structure characteristics of the reverse-flow combustor, a parallel plate double dielectric barrier discharge(DBD) PAC actuator was designed to generate plasma. It was installed at the front of combustor. When the actuator is driven, the original air flow is not disturbed for the device’s structure and installation. Using aviation kerosene as fuel, the effects of plasma on ignition boundary and outlet temperature of the combustor were experimentally investigated at atmosphere pressures. Through the dual high voltage differential power supply, the large gap, large area and uniform plasma discharge was achieved. The results of PAC actuator discharge indicate that inlet air temperature has a small increase of 4–9 K. After PAC is applied, the combustion performances of reverse-flow combustor in an aero-engine are remarkably improved. Experimental results indicate that ignition boundary is widened by 3.7%–12.5% because of the impact of plasma. Outlet highest temperature of combustor is raised by 19–75 K;outlet temperature distribution coefficient is reduced by 11.1%–26.6%. This research provides an effective and practicable way to implement the application of PAC in aero-engine combustor and has some engineering application significance.

关键词： aero-engine reverse-flow combustor double dielectric barrier discharge plasma assisted combustion

Case study on the seismic response of a subway station combined with a flyover

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Underground Space 2021年第6期6卷 665-677页

作者： Qi Wang Ping Geng Xiangyu Guo Xinqiang Wang Peisong Li bingbing zhao Key Laboratory of Transportation Tunnel Engineering Ministry of EducationSouthwest Jiaotong UniversityChengduSichuan 610031China China Railway Construction Bridge Engineering Bureau Group No.2 Engineering Co. LtdShenzhenGuangdong 518083China Tianjin Municipal Engineering Design&Research Institute Tianjin 300392China

With the rapid development of urban traffic networks,subway stations will inevitably be constructed close to other structures in the *** subject of this study is a new subway station in China,combined with a flyover standing on the roof,owing to its unique structural *** on the time history-analysis method,the dynamic responses of the subway station,piers,and piles under seismic conditions were *** results show that the internal force and deformation of the underground structure vary under seismic excitation in different directions and are more dangerous in the under transverse excitation than under longitudinal ***,the dynamic response of the underground structure is severe under the action of low-frequency-rich Wenchuan waves,and the resonance effect is *** load of the bridge was found to inhibit the deformation of the underground structure to a certain ***,the mid-pillar and slab-mid-pillar connections are the weakest parts,and special attention should be paid to their seismic ***,the piers and piles can maintain good working condition under the action of an earthquake with the peak acceleration of 0.1g.

关键词： Subway station Time-history analysis Seismic design Spectrum characteristics Integrated structure

Application study on plasma ignition in aeroengine strut–cavity–injector integrated afterburner

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Plasma Science and Technology 2021年第10期23卷 186-196页

作者： Li Fei bingbing zhao Xiong Liu Liming He Jun Deng Jianping Lei Ziehen zhao Zhiyu zhao Air Force Engineering University Xi'an 710038People's Republic of China Aviation University of Air Force Changchun 130022People's Republic of China

To increase the thrust-weight ratio in next-generation military aeroengines,a new integrated afterburner was designed in this *** integrated structure of a combined strut–cavity–injector was applied to the *** improve ignition characteristics in the afterburner,a new method using a plasma jet igniter was developed and optimized for application in the integrated *** effects of traditional spark igniters and plasma jet igniters on ignition processes and ignition characteristics of afterburners were studied and compared with the proposed *** experimental results show that the strut–cavity–injector combination can achieve stable combustion,and plasma ignition can improve ignition *** with conventional spark ignition,plasma ignition reduced the ignition delay time by 67 ***,the ignition delay time was reduced by increasing the inlet velocity and reducing the excess air *** investigation provides an effective and feasible method to apply plasma ignition in aeroengine afterburners and has potential engineering applications.

关键词： integrated afterburner aeroengine plasma ignition ignition process ignition characteristics

China Henan Cultural and Art Troupe's Performance Tour of Venezuela and Brazil

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Voice of Friendship 2007年第4期 45-46页

作者： zhao bingbing

Invited by the Venezuelan National Council of Culture and the Brazil Chinese Cultural Exchange Association, a 69-member cultural and art troupe from Henan Province, China gave three performances with a total audience ... 详细信息

关键词： Brazil Henan audience bringing overseas Vladimir M

Innovative Construction of Employment-oriented Two-year Vocational English Teaching System

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International English Education Research 2014年第4期 71-73页

作者： Guopeng zhao bingbing Shi Foreign Languages Department Handan Polytechnic College Handan Hebei 056005 China 056005

This paper by analyzing the current situation and problems in China＇s current two-year vocational college English teaching system, employment-oriented focuses on developing students＇ professional competence jobs for Reconstruction and innovative two-year vocational college English teaching system reform ideas, curriculum segments, curriculum construction, teaching design, teaching evalua-tion model and extracurricular teaching supplement five in-depth discussions, in order to make it more effective, science, flexibility and professional relevance, and lay a good foundation for English language students＇ future employment and real work.

关键词： Vocational Colleges Two-Year System College English Teaching System Innovation

Reform and Innovation of Higher Graduation Comprehensive Practice Mode -- Take tourism English professional for example

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International English Education Research 2014年第4期 83-85页

作者： bingbing Shi Guopeng zhao Foreign Languages Deparlxnent Handan Polytechnic College Handan Hebei Province China 056005

In this paper, we take Tourism Vocational English for example, through the analysis of the problems and contradictions in vocational high school practice, around the vocational training objectives, make in-depth discussion of reform and innovation of graduation comprehensive practice mode from the overall design, stage promotion and process management.

关键词： Vocational Colleges Graduation Practice Intemships Thesis Innovation