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Research on the Application of supportability Analysis technology in Ejection Seat

Journal of Physics: Conference Series 2019年第1期1215卷

作者： Wensheng Wang Liying Jin Jing Liu Xi Sun Aviation Key Laboratory Science and Technology on Life-Support Technology HubeiXiangyang 441003 China Aerospace Life-Support Industries Ltd. HubeiXiangyang 441003 China School of Mechanical Engineering Xi'an Jiaotong University Shaanxi Xi'an 710049 China

Ejection seat is a complex system that can be both one-time-used and continuous-used, in which the supportability analysis technology plays an essential role. supportability analysis includes Reliability-Centered Maintenance Analysis (RCMA, for short), Corrective Maintenance Analysis, Level of Repair Analysis (LORA, for short), Operation and Maintenance Task Analysis (O&MTA, for short), support Equipment Requirement Analysis and Spare Parts Requirement Analysis (shortened as '6A'). Firstly, in this paper, the concept of '6A' technology and their relationship are introduced. The general '6A' working process of a certain type of ejection seat is then studied. In the end, the '6A' work is carried out on a certain type of ejection seat according to the analytical steps and requirements to '6A'.

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Simultaneously static and dynamic layout designs of stiffening structures

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IOP Conference Series: Materials science and Engineering 2020年第1期892卷

作者： Zhijie Feng Kai Wu Xuan Liang Jianbin Du AVIC Aerospace Life-Support Industries LTD Aviation Key Laboratory of Science and Technology on Life-Support Technology Xiangyang 441000 P.R. China School of Aerospace Engineering Tsinghua University Beijing 100084 P.R. China

In the present paper, the topological design problem of lightweight stiffening structures are studied. Multiple design criteria like static compliance, dynamic compliance, eigenfrequency/eigenfrequency gaps and weight are considered simultaneously as sub-objectives in the optimization model. A bound formulation is developed and implemented to deal with the problem concerned, by which the difficulties of non-continuity of the multiple objective functions can be got over. Comparing with the empirical adjustment design or more elaborated parametric design, the topological design may introduce more degrees of design freedom, and thus is possible to produce more innovative conceptual design. The method of sequential convex programming is employed to find the solution of the optimization problem. Numerical examples show that, using the presented approach, the optimized layout of the stiffening structures with enhanced static and dynamic mechanical properties can be obtained.

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Performance comparation of two kinds of aircraft ram air outlet

Performance comparation of two kinds of aircraft ram air out...

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CSAA/IET International Conference on Aircraft Utility Systems (AUS 2020)

作者： L. Zhimao Z. Xinlong W. Boyu P. Houju X. Wenbing S. Hong Shanghai Aircraft Design and Research Institute Environment Control and Oxygen System Department Shanghai 201210 China Jiangsu University of Science and Technology College of energy and power Zhenjiang 212003 China MIIT Nanjing University of Aeronautics and Astronautics Key Laboratory of Aircraft Environment Control and Life Support Nanjing 210016 China

With the development of electronic equipment integration technology, the air demand for cooling in cabin and electronic system is increasing continuously. The ram air outlet plays an important role in the airflow system. In this paper, the three-dimensional modeling of the door-type ram air outlet and the grille-type ram air outlet is carried out. Then, the flow characteristics and resistance characteristics of ram air outlet are analyzed based on structured grid technology. The results show that the flow rate of the door panel ram air outlet is greater than that of the grille-type ram air outlet in the same size, the discharge rate of the door panel outlet is 0.3kg/s more than that of the grille-type outlet under the design condition, and the skin surface temperature at the back of the door panel outlet is 13.5K lower than that of the grille outlet. Therefore, the door-type ram air outlet has better emission characteristics and flow characteristics, which is more suitable for the aircraft in this research. This study provides a technical reference for the design of the civil aircraft.

关键词： aircraft control refrigerators refrigeration skin electric actuators design engineering metal foams heat exchangers cooling

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Reliability Analysis of Certain Rocket Engine Based on Fault Tree

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IOP Conference Series: Materials science and Engineering 2019年第1期538卷

作者： Wensheng Wang Liying Jin Xi Sun Jing Liu Aviation Key Laboratory Science and Technology on Life-Support Technology Hubei Xiangyang 441003 China Aerospace Life-Support Industries Ltd. Hubei Xiangyang 441003 China School of Mechanical Engineering Xi'an Jiaotong University Shaanxi Xi'an 710049 China

In this paper, a fault tree model of certain rocket engine is established according to its structure and working principle. Through qualitative analysis and quantitative calculation, the factors affecting the reliability of a certain type of rocket engine are obtained, and the corresponding improvement measures are put forward to improve the reliability and safety of a certain type of rocket engine.

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Enhancing Water Toxicity Determination Sensitivity by Using Tmao as the Electron Acceptor of Inward Extracellular Electron Transfer in Electrochemically Active Bacteria

SSRN

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SSRN 2024年

作者： Zang, Yuxuan Cao, Bo Yi, Xuemei Zha, Fan Ge, Yanhong Liu, Hong Yi, Yue Key Laboratory of Smart Medicine and Health Care for Elderly Chronic Diseases School of Medical Shanxi Datong University Datong037009 China School of Life Beijing Institute of Technology Beijing100081 China Institute of Environmental Biology and Life Support Technology School of Biological Science and Medical Engineering Beihang University Beijing100191 China International Joint Research Center of Aerospace Biotechnology and Medical Engineering Beihang University Beijing100191 China Infore Environment Technology Group Foshan528000 China

Toxicity determination based on electrochemically active bacteria (EAB) shows great prospects for early warning of sudden water pollution. However, the main bottleneck for practical application is the low sensitivity. Extracellular electron transfer (EET) is a key parameter influencing sensitivity. Our previous research has demonstrated that EAB exhibit higher sensitivity when performing inward EET compared with outward EET. Inward EET relies on electron acceptors, but the effects on sensitivity remain unclear. In this study, the sensitivity of toxicity determination with different electron acceptors was compared. Results indicated that the choice of electron acceptors significantly changed the sensitivity. When Trimethylamine N-oxide (TMAO) was chosen as the electron acceptor, EAB exhibited the highest sensitivity, with a lower response limit of 0.05 mg/L Cd2+. The main reason was that the utilization of TMAO for inward EET increases the membrane permeability of EAB cells, facilitates toxic pollutant penetration, and results in high mortality after toxicity exposure. © 2024, The Authors. All rights reserved.

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Effects of Geometric Parameters on Performance of Rectangular Submerged Inlet for Aircraft

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Transactions of Nanjing University of Aeronautics and Astronautics 2021年第6期38卷 984-992页

作者： LIU Chao PEI Houju CHEN Changdong XU Wenbing YANG Kaijie Environment Control and Oxygen System Department Shanghai Aircraft Design and Research InstituteShanghai 201210P.R.China AVIC Nanjing Servo Control System Corporation Nanjing 210016P.R.China College of Energy&Power Engineering Jiangsu University of Science and TechnologyZhenjiang 212003P.R.China Key Laboratory of Aircraft Environment Control and Life Support MIITNanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China

To improve the comfortability and safety of aircraft,the demand of rectangular submerged inlets(RSIs)with low resistance is proposed to increase the inlet flow rate of ram air. A theoretical model is built to numerically analyze the effects of geometric parameters on the inlet mass flow rate of RSIs. The geometric parameters in question here encompass the aspect ratio of 2—4,the ramp angle of 6°—7°,the characteristic parameter of the throat of 0.20 —0.30,the ramp length of 939—1 337 mm,and the cone angle of 0° —3°. Simulation results demonstrate that the mass flow rate(MFR)is positively correlated with the aspect ratio,ramp angle,ramp length,and cone angle,and negatively correlated with characteristic parameter of the throat. Within the range of the geometric parameters considered,the RSI with the aspect ratio of 3,the ramp angle of 6°,the characteristic parameter of the throat of 0.20,the ramp length of 1 337 mm,and the cone angle of 3° obtains the largest MFR value of about 2.251 kg/s.

关键词： ram air system rectangular submerged inlet geometric parameter mass flow rate(MFR)

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Numerical simulation and experimental research of shear-driven water film on flat plate

Numerical simulation and experimental research of shear-driv...

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CSAA/IET International Conference on Aircraft Utility Systems (AUS 2024)

作者： Qinyang Li Ning Guan Bo Ning Guangya Zhu Dalin Zhang Weijian Chen Key Laboratory of Aircraft Environment Control and Life Support MIIT Nanjing University of Aeronautics and Astronautics Nanjing People's Republic of China College of Aeronautics Shandong Jiaotong University No.5001 Haitang Road Changqing University Science and Technology Park Jinan People's Republic of China Utility System Design and Research Department Jiangxi Hongdu Aviation Industry Group Company Ltd. Nanchang People's Republic of China

ISBN: (数字)9781837242108

The supercooled water droplets in the air will form a water film on the aircraft during flight, which will then form icing, which will have an impact on the aerodynamic performance of the aircraft and even endanger the flight safety. In this paper, based on the Eulerian Wall Films model, the partial wetting effect is introduced, and the water film flow on flat plates driven by airflow shear force is investigated. The flow behaviours of water film with different contact angles under different flow rates were explored through water film test. The effectiveness of the calculation method for water film flow characteristics in this paper was verified by comparison between numerical simulation and test records, which laid a foundation for the anti-icing calculation in subsequent studies.

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Gold nanoparticle-directed autophagy intervention for antitumor immunotherapy via inhibiting tumor-associated macrophage M2 polarization

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Acta Pharmaceutica Sinica B 2022年第7期12卷 3124-3138页

作者： Siyue Zhang Fangyuan Xie Kaichun Li He Zhang You Yin Yuan Yu Guangzhao Lu Shihao Zhang Yan Wei Ke Xu Yan Wu Hong Jin Lan Xiao Leilei Bao Can Xu Yulin Li Ying Lu Jie Gao Department of Pharmacy Naval Medical UniversityShanghai 200433China Changhai Clinical Research Unit Shanghai Changhai HospitalNaval Medical UniversityShanghai 200433China Institute of Translational Medicine Shanghai UniversityShanghai 200444China Department of Pharmacy Shanghai Eastern Hepatobiliary Surgery HospitalNaval Medical UniversityShanghai 200433China Department of Oncology Shanghai Fourth People’s HospitalSchool of MedicineTongji UniversityShanghai 200434China Unit for Drug and Instrument Supervision and Inspection of Wuxi Joint Logistic Support Center Nanjing 210000China Key Laboratory for Ultrafine Materials of Ministry of Education Engineering Research Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Gastroenterology Shanghai Changhai HospitalNaval Medical UniversityShanghai 200433China Department of Neurology Changzheng HospitalNaval Medical UniversityShanghai 200003China Department of Biomaterial College of Life SciencesMudanjiang Medical UniversityMudanjiang 157011China Department of Laboratory Medicine Hongqi HospitalMudanjiang Medical CollegeMudanjiang 157011China Centre for Biomedical Technologies Queensland University of TechnologyBrisbane QLD 4000Australia mWenzhou Institute of Shanghai UniversityWenzhou 325000China

Tumor-associated macrophages(TAMs),one of the dominating constituents of tumor microenvironment,are important contributors to cancer progression and treatment ***,regulation of TAMs polarization from M2 phenotype towards M1 phenotype has emerged as a new strategy for tumor ***,we successfully initiated antitumor immunotherapy by inhibiting TAMs M2 polarization via autophagy intervention with polyethylene glycol-conjugated gold nanoparticles(PEG-Au NPs).PEG-Au NPs suppressed TAMs M2 polarization in both in vitro and in vivo models,elicited antitumor immunotherapy and inhibited subcutaneous tumor growth in *** demonstrated by the m RFP-GFP-LC3 assay and analyzing the autophagy-related proteins(LC3,beclin1 and P62),PEGAu NPs induced autophagic flux inhibition in TAMs,which is attributed to the PEG-Au NPs induced lysosome alkalization and membrane ***,TAMs were prone to polarize towards M2phenotype following autophagy activation,whereas inhibition of autophagic flux could reduce the M2polarization of *** results revealed a mechanism underlying PEG-Au NPs induced antitumor immunotherapy,where PEG-Au NPs reduce TAMs M2 polarization via induction of lysosome dysfunction and autophagic flux *** study elucidated the biological effects of nanomaterials on TAMs polarization and provided insight into harnessing the intrinsic immunomodulation capacity of nanomaterials for effective cancer treatment.

关键词： Macrophage polarization Tumor-associated macrophages Nanomaterials Autophagy flux Lysosomal damage Gold nanoparticles M2 macrophage Cancer therapy

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A Novel Petal-Type Battery Thermal Management System with Dual Phase Change Materials

SSRN

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SSRN 2022年

作者： Li, Yonghao Chen, Zhaolin Feng, Yi Liu, Meinan Kang, Chuanzhi Yang, Kaijie Yuan, Jie Qiu, Chenghui Shi, Hong Jiang, Yanlong Key Laboratory of Aircraft environment control and life support MIIT Nanjing University of Aeronautics & Astronautics 29 Yudao Street Nanjing210016 China College of Energy & Power Engineering Jiangsu University of Science and Technology 2 Mengxi Jingkou Zhenjiang212003 China China Ship Development and Design Center 268 Zhangzhidong Road Wuchang Wuhan430064 China

Phase change material (PCM) cooling is a promising approach to battery thermal management, but its wide application is limited by the narrow phase change temperature range. When the PCM temperature is below the melting point, PCM is equivalent to a purely thermally conductive material. When the ambient temperature exceeds the phase change temperature of PCM, PCM melts completely and cannot play the role of battery thermal management. Therefore, a novel petal-type battery thermal management system (BTMS) with dual PCMs is proposed in this paper to solve the environmental adaptability problem of PCM cooling. The thermal performance of the system at different ambient temperatures and different discharge rates is investigated by numerical simulation methods. The results show that the maximum temperature of battery at 2 C discharge rate is 30.49 ℃, 34.16 ℃ and 43.70 ℃ at ambient temperatures of 20 ℃, 30 ℃ and 40 ℃, respectively. Compared with the BTMS filled with a single PCM, the thermal performance of the proposed BTMS is particularly good at the high operating temperature represented by 40 ℃. At lower ambient temperatures such as 20 ℃ and 30 ℃, the thermal performance is not the best, but it fully meets the requirements of battery thermal management. Furthermore, the above BTMS is optimized using fin-reinforced heat transfer technology in this paper. The solution with the optimal fin arrangement can reduce the maximum temperature difference by 36.2% and 42.8% and the maximum temperature rise by 5.53% and 29.19% at 30 ℃ and 40 ℃, respectively. © 2022, The Authors. All rights reserved.

关键词： Phase change materials

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A Novel Petal-Type Battery Thermal Management System with Dual Phase Change Materials

SSRN

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SSRN 2022年

Phase change material (PCM) cooling is a prominent approach for battery thermal management. However, its wide application is limited by the narrow range of phase change temperature. When the temperature of PCM does not reach the phase change temperature range, it is either a pure thermal conductive material or a completely molten liquid material, neither of which can take effect in battery thermal management. The present study provides a novel petal-type battery thermal management system (BTMS) with dual PCMs, which has greatly enhanced environmental adaptability compared to other PCM-based BTMS. The thermal performance of the BTMS at different ambient temperatures and discharge rates is investigated by numerical simulation methods. The results show that when the ambient temperature is 20 °C, 30 °C and 40 °C, the maximum temperature of battery ( [[EQUATION]] ) at 2 C discharge rate is 30.49 °C, 34.16 °C and 43.7 °C, respectively. Considering the three common ambient temperature conditions comprehensively, the thermal performance and environmental adaptability of the proposed BTMS is the best compared to the other two conventional BTMS with a single filled PCM. Furthermore, the above BTMS is optimized using fin-reinforced heat transfer technology in this paper. At an ambient temperature of 30 °C, the solution with a better fin arrangement can reduce the maximum temperature difference ( [[EQUATION]] ) by 42.8% and the maximum temperature rise ( [[EQUATION]] ) by 29.19% compared to the system without fins, respectively. © 2022, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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