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A Review of Biological Fluid Power Systems and Their Potential Bionic Applications

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Journal of Bionic Engineering 2019年第3期16卷 367-399页

作者： chunbao Liu Yingjie Wang Luquan Ren Lei Ren School of Mechanical and Aerospace Engineering Jilin University Changchun 130022 China Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130022 China School of Mechanical Aerospace and Civil Engineering University of Manchester Manchester M13 9PL UK

Nature has always inspired human achievements in industry, and biomimetics is increasingly being applied in fluid power technology. Arachnida use hydraulic forces, rather than muscle, for leg extensions during locomotion. Many cold-blooded and soft-bodied organisms rely on a hydrostatic skeleton to transmit force, which involves a hydraulic mechanism. Biological hydraulic transmission differs from engineering hydraulic transmission in many aspects, such as in energy transfer and transformation, the movement mode, environmental friendliness, system pressure level, and energy supplement mode. The existence of a hydraulic mechanism in a biological drive requires 3 features: a power source, cavity, and working medium. The power source is similar to a hydraulic pump, and the cavity is similar to a hydraulic cylinder, both of which are necessary for producing deformation. The working medium is similar to a hydraulic fluid. Under these 3 conditions, a biological flow is generated inside or outside the body to meet the requirements of a biological drive. This paper reviews the biological organisms that employ hydraulic systems, identifies related studies on these biological hydraulic systems, and summarizes the mechanisms involved in using hydraulic pressure to achieve graceful and agile movements. This in-depth study and exploration of biological hydraulic systems can provide a good reference for solving the challenges of using hydraulic systems, such as increasing the energy efficiency, improving reliability, building smart components and systems, reducing the size and weight of components, reducing the environmental impact of systems, and improving and applying energy storage and redeployment capabilities. This paper also includes a detailed discussion of new ideas and innovative sources for the future development of hydraulic systems. In contrast with the bio-inspired designs used in other engineering fields, very few studies have reported on using bio-inspired methods

关键词： bionic fluid power pressurized liquids locomotion bio-inspired applications

A Brief Overview of Low CO_2 Emission Technologies forIron and Steel Making

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Journal of Iron and Steel Research(International) 2010年第3期17卷 1-7页

作者： chunbao (Charles) XU CANG Da-qiang Department of Chemical Engineering Lakehead'.University Ontario P7B 5El Canada School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083 China

The global steel production has been growing for the last 50 years, from 200 Mt in 1950s to 1 240 Mt in 2006. Iron and steel making industry is one of the most energy-intensive industries, with an annual energy consumption of about 24 EJ, 5% of the world＇s total energy consumption. The steel industry accounts for 3%-4% of totat world greenhouse gas emissions. Enhancing energy efficiency and employing energy saving/recovering technologies such as coke dry quechning （CDQ） and top pressure recovery turbine （TRT） can be short-term approaches to the steel industry to reduce greenhouse gas emission. The long-term approaches to achieving a significant reduction in CO2 emissions from the steel industry would be through developing and applying CO2 breakthrough technologies for iron and steel making, and：through increasing use of renewable energy for iron and steel making. Thus, an overview of new CO2 breakthrough technologies for iron and steel making was made.

关键词： greenhouse gas emission CO2 reduction technology ironmaking steelrnaking

Characterization of glucose isomerase-producing bacteria and optimization of fermentation conditions for producing glucose isomerase using biomass

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Green Chemical Engineering 2023年第2期4卷 239-249页

作者： Aristide Laurel Mokale Kognou Chonlong Chio Janak Raj Khatiwada Sarita Shrestha Xuantong Chen Hongwei Li Yuen Zhu Zi-Hua Jiang chunbao(Charles)Xu Wensheng Qin Department of Biology Lakehead UniversityThunder BayONP7B 5E1Canada Department of Chemical and Biochemical Engineering Western UniversityLondonONN6A 5B9Canada School of Environment and Resources Shanxi UniversityTaiyuan030006China Department of Chemistry Lakehead UniversityThunder BayONP7B 5E1Canada

Glucose isomerase(GI)is an enzyme with high potential *** of GI producing bacteria with interesting properties from an industrial point of view is *** sp.,Paenarthrobacter sp.,Chryseobacterium sp.,Hymenobacter sp.,Mycobacterium sp.,and Stenotrophomonas *** isolated from soil *** of enzyme production yield was investigated in various fermentation conditions using response surface *** isolates exhibited maximum GI activity at 40℃,pH 6–8 after 4 days of incubation.A mixture of peptone/yeast extract or tryptone/peptone enhanced higher enzyme *** same trend was observed in fermentation medium containing 1%xylose or 2%–2.5%wheat *** study advanced the knowledge of these bacterial isolates in promoting wheat straw as feedstock for the bio-based industry.

关键词： Cellulolytic bacteria Glucose/xylose isomerase 16S rRNA Biomass conversion

Design and Optimization of Bionic Janus Blade in Hydraulic Torque Converter for Drag Reduction

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Journal of Bionic Engineering 2018年第1期15卷 160-172页

作者： chunbao Liu Chuang Sheng Hualong Yang Zhe Yuan School of Mechanical Science and Engineering Jilin University Changchun 130022 China Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130022 China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun 130022 China

The chief aim of the present work was to achieve drag reduction in stator blades with liquid using boundary layer control. A stator blade of hydraulic torque converter with bionic grooves in suction side and hydrophobic surface in pressure side was designed. The hydrophobic surface was created using anodic oxidation method and irregular A1203 thin films were found on the surface. They formed hierarchical structure consisting of mini porous structures and microscopic pore spaces, resulting in the hydrophobicity. The bionic groove was designed by Computational Fluids Dynamics （CFD） method. Multi-Island Genetic Algorithm （MIGA） was adopted for groove multi-objective optimization. Through optimization, the maximum drag reduction was close to 12% in oil. In addition, the drag reduction calculation was verified by closed channel experiment and ＂Tire Vortex＂ was proposed to explain the drag reduction mechanism. The bionic Janus blade could maintain its initial profile without any additional device, which had lower risk and less cost. The results are encouraging and show great potential to apply in other flow machineries.

关键词： hydraulic torque converter bionic blade boundary layer control drag reduction

杭来湾煤矿大采高综采面回采巷道围岩变形规律

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陕西煤炭 2024年第3期43卷 12-16页

作者：闫鹏佳薛雄飞胡志华刘桂璋赵志杨许春宝陕西有色榆林煤业有限公司陕西榆林719000 中国矿业大学矿业工程学院江苏徐州221116

回采巷道超前段围岩变形规律对于评价和优化巷道支护技术和保证工作面正常生产具有重要意义。以杭来湾煤矿30201大采高工作面为例,采用十字观测法对30201工作面回采巷道超前段表面位移变化规律进行监测,发现胶运平巷在超前工作面约22~3... 详细信息

回采巷道超前段围岩变形规律对于评价和优化巷道支护技术和保证工作面正常生产具有重要意义。以杭来湾煤矿30201大采高工作面为例,采用十字观测法对30201工作面回采巷道超前段表面位移变化规律进行监测,发现胶运平巷在超前工作面约22~38 m处开始发生变形,顶底板、两帮移近速度分别从11~15 m处急剧增大。同时,采用钻孔窥视技术对胶运平巷超前段围岩松动圈分布情况进行了观测,发现工作面前方3 m处巷道围岩处于采动影响剧烈阶段,工作面前方8 m处于超前支承压力峰值影响阶段,工作面前方18 m处处于超前支承压力减弱段。综合分析表面位移变形规律和松动圈测试结果,30201回采巷道采动影响迹象显现范围约为超前18 m。该成果可为类似大采高工作面回采巷道围岩控制及支护参数优化提供借鉴。

关键词：大采高综采面回采巷道围岩变形表面位移观测钻孔窥视

NUMERICAL ANALYSIS ON THREE-DIMENSIONAL FLOW FIELD OF TURBINE IN TORQUE CONVERTER

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Chinese Journal of Mechanical Engineering 2007年第2期20卷 94-96页

作者： LIU Yue PAN Yuxue LIU chunbao School of Mechanical and Changchun University of ScienceChangchun 130022 China College of Mechanical Science and Engineering Jilin University Changchun 130025 China

Three-dimensional flow field of turbine in torque converter is simulated by numerical calculation in order to improve the performance of torque converter. Calculation model of a torque converter is presented based on the mixing-plane technology. In the calculation of flow field, the 3D N-S equations are separated by finite-volume method and solved by semi-implicit method for pressure-linked equations（SIMPLE）. Based on flow field calculation, the flow field of turbine is simulated. The velocity and pressure in the flow field of turbine are analyzed. The external performance of the torque converter is also calculated. Results of flow simulation show that there are secondary flow, off flow and velocity gradient in turbine passage. The validity of numerical simulation is verified by comparing the results of numerical simulation with experiment data.

关键词： Torque converter Turbine Flow field Numerical analysis

Three-dimensional VOF simulation of droplet impacting on a superhydrophobic surface

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Bio-Design and Manufacturing 2019年第1期2卷 10-23页

作者： Jin Sun Qi Liu Yunhong Liang Zhaohua Lin chunbao Liu School of Mechanical Science and Aerospace Engineering Jilin University Changchun 13002 China Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun. China

It is very important to analyze and study the motion process of droplets impacting superhydrophobic surface, which is of great significanee to understand the mechanism of superhydrophobic surface and guide the design and manufacture of superhydrophobic surface. Taking by three-dimensional volume of fluid (VOF) simulation coupling coupled level set (CLS) algorithm, on the one hand, we simulate the morphological changes in the process of droplet impingement, as well as the internal velocity and the pressure distribution;on the other hand,we focus on the effects of droplet impact velocity, surface wettability, surface tension on the dynamics of the droplets. The CLSVOF model inherits the advantages of the VOF model for accurately constructing the phase interface and inherits the advantage that the level set can accurately calculate the surface tension, which improves the accuracy of the calculation of the droplet impact on the superhydrophobic surface. The computed results distinctly demonstrated there were four stages: falling, spreading, shrinking and rebounding. The time history of each stage agreed well with the pictures captured by high-speed camera, which indicated the computational fluid dynamics scheme was effective. Moreover, the motion mechanism of the droplets impacting on the solid surface is elaborated, which was helpful to control the solid-liquid interface to achieve a variety of solid interface characteristics.

关键词： Superhydrophobic Droplet impact Computational fluid dynamic VOF

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硫脲对电解高性能双面光锂电铜箔性能的影响

材料保护 2024年第5期57卷 172-177,190页

作者：刘燕陈志林孔令花张倩倩王永森唐春保嘉应学院化学与环境学院广东梅州514015

为研究硫脲质量浓度对铜箔表面形貌、结构、性能以及电解液电化学行为的影响,以磷铜板为阳极,以硫脲(TU)、羟乙基纤维素(HEC)、聚乙二醇(PEG-1000)和聚二硫二丙烷磺酸钠(SPS)作为组合添加剂,采用自制旋转电镀装置以直流电沉积法在TAl钛... 详细信息

为研究硫脲质量浓度对铜箔表面形貌、结构、性能以及电解液电化学行为的影响,以磷铜板为阳极,以硫脲(TU)、羟乙基纤维素(HEC)、聚乙二醇(PEG-1000)和聚二硫二丙烷磺酸钠(SPS)作为组合添加剂,采用自制旋转电镀装置以直流电沉积法在TAl钛辊上制备电解铜箔,并利用扫描电子显微镜、铜箔拉伸强度试验仪以及电化学分析等方法,重点考察了组合添加剂中TU对铜箔表面形貌和物理性能的影响。结果表明:在组合添加剂体系中TU具有较强的极化作用,可以抑制铜核的生长,使铜箔结晶更细致,有效地起到光亮和整平作用并提高铜箔力学性能,且组合添加剂间表现出较好的协同效应。在高性能锂电铜箔的制备过程中,可通过适当调整电解液中硫脲的加入量来改善电解铜箔的各项性能。

关键词：电解铜箔抗拉强度添加剂硫脲

Preparation of nanometer yellow iron and its UV absorption capacity

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Journal of University of Science and Technology Beijing 2007年第1期14卷 72-76页

作者： chunbao Sun Beihai Zhou Nan Li Ruiming Wang Civil and Environment Engineering School University of Science and Technology Beijing Beijing 100083 China Semiconductor Manufacture International Corporation （Tianjin） Tianjin 300380 China

The nanometer yellow iron oxide was prepared by oxidizing Fe（OH）2 with air, which was verified with XRD and TEM. The result shows that nanometer yellow iron oxide is spindle-shaped and well-distributed with a long axis of 150-200 nm and short axis of 40-50 nm. Ultraviolet （UV） transmittance of the iron oxide shows the great effect of concentration on both transparency and UV ab- sorption, and it has been proven that iron oxide with a concentration of 0.025wt% is preferred. The spectrum of XRD indicates that it is goethite. When the yellow iron is dispersed in sol, given that the wavelength of UV is less than 300 nm, its UV absorption capacity is superior to those of ZnO and TiO2. The absorption capacity of the yellow iron is less than TiO2 and more than ZnO as the wavelength of UV is 300-400 nm.

关键词： yellow iron oxide nanometer particle UV absorption transparency