Yanan Yang

Nantong University

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Xuesi Chen

Changchun Institute of Applied Chemistry

Jianxun Ding

Chinese Academy of Sciences

Xiuli Zhuang

Chinese Academy of Sciences

Weirong Zhao

Zhejiang University

Wendong Zhang

North University of China

Tong Guo

Huazhong University of Science and Technology

Yang Cao

Nantong University

Qingzhu Zheng

Fujian Medical University

Yan Wang

State Forestry and Grassland Administration

Weiguo Xu

Tianjin Hospital

Cooperative Institutions

Chinese Academy of Sciences

Changchun Institute of Applied Chemistry

Zhejiang University

Nantong University

Jilin University

Changchun University of Technology

University of Science and Technology of China

Huazhong University of Science and Technology

State Key Laboratory of Polymer Physics and Chemistry

Shanghai Jiao Tong University

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Air Dynamic Stability of Airfoils in Lift-Type Vertical Axis Wind Turbine by Measuring Turbulence

Advances in transdisciplinary engineering (2023)

Qian Zhong Jinyi Li Guanben Xia Jianping Xia Xuhong Kang

Stability might be the other important target besides power efficiency. At this work, we focus on examining air dynamic stability of vertical axis wind turbine (VAWT). While our aim is on stability, we will consider it in instability aspect, specifically by measuring turbulence. The quantities are including turbulence kinetic energy, intensity, dissipation and production. Three representative airfoils have been selected, which are NACA0012, NACA23012 and NACA2412. The turbulence generated around these airfoils would be compared at different stages of running, at TSR of 0, 2, 5 and 7. Every position of the airfoil is taken into account, 360 degrees with interval of 5. Here we will apply static analysis instead of transient one because we attempt to eliminate some other effect of air flow in the meantime acquiring higher computation accuracy. At first, we would scrutinize some fundamental principles of turbulence theory. The theory is based on the structure of statistics. Unfolded, there is the kinetic energy equation that leads to the basic quantities mentioned above. Each quantity has certain meaning and role in turbulence. Then we will resent the computation method and results.

Lift (data mining)

10.3233/atde230132

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Influence of Magnetic Pole Stepping Combined with Auxiliary Stator Slots on the Stability of Dual-Rotor Disc Motors

Energies (2023)

Tong Guo Yang Cao Qian Zhong Jianping Xia Xuhong Kang

With the growing utilization of disc motors, the enhancement of their operational stability has become a critical research area. The existing studies usually focus on improving the pole structure of the rotor or the stator structure to optimize one performance of the motor and less on optimizing multiple performances. This paper simultaneously improves the rotor pole structure and stator tooth structure of the motor in order to optimize the sinusoidal waveform of the no-load back electromotive force and the cogging torque at the same time to achieve the goal of reducing the vibration and noise of the permanent-magnet synchronous dual-rotor statorless magnetically coupled disc motor and improve its operational stability. A finite element simulation model of a 20-pole, 24-slot permanent-magnet synchronous dual-rotor statorless magnetically coupled disc motor is established to analyze the influence of various factors, including the number of magnetic pole steps, the opening position, depth, and width of the stator auxiliary slot, on the motor performance. The results show that this stator–rotor combination improvement method effectively reduces the total harmonic distortion (THD) and attenuates multiple harmonics, and the peak cogging torque pulsation is significantly improved while other properties of the motor meet the technical requirements, and the motor performance is improved.

Cogging torque

Counter-electromotive force

Synchronous motor

10.3390/en16227512

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Preparation and characterization of PSF-TiO2 hybrid hollow fiber UF membrane by sol–gel method

Journal of Polymer Research (2020)

Hongchao Zhang Yuyang Guo Xuesong Zhang Xuemei Hu Chaoran Wang

Polysulfone

Ultrafiltration (renal)

Titanium Dioxide

Hollow fiber membrane

Thermal Stability

10.1007/s10965-020-02313-z

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Citations (12)

PEGylated Polyurea Bearing Hindered Urea Bond for Drug Delivery

Meishan Chen Xiangru Feng Weiguo Xu Yanqiao Wang Yanan Yang

In recent years, polyureas with dynamic hindered urea bonds (HUBs), as a class of promising biomedical polymers, have attracted attention as a benefit of their controlled hydrolytic property. The effect of the chemical structures on the properties of polyureas and their assemblies was rarely reported. In this study, four kinds of polyureas with different chemical groups have been synthesized, and the polyurea from cyclohexyl diisocyanate and tert-butyl diamine showed the fastest hydrolytic rate. The amphiphilic polyurea composed of hydrophobic cyclohexyl-tert-butyl polyurea and hydrophilic poly(ethylene glycol) was synthesized for controlled delivery of antitumor drug paclitaxel (PTX). The PTX-loaded PEGylated polyurea micelle more effectively entered into the murine breast cancer 4T1 cells and inhibited the corresponding tumor growth in vitro and in vivo. Therefore, the PEGylated polyurea with adjustable degradation might be a promising polymer matrix for drug delivery.

Polyurea

10.20944/preprints201904.0075.v1

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Citations (2)

The research of rheology and thermodynamics of organic–inorganic hybrid membrane during the membrane formation

Journal of Membrane Science (2007)

Yanan Yang Jun Wu Qingzhu Zheng Xuesi Chen Zhang Hui-xuan

Phase inversion

Membrane Technology

10.1016/j.memsci.2007.12.014

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Citations (89)

Mesomeric configuration makes polyleucine micelle an optimal nanocarrier

Biomaterials Science (2016)

Taoyuan He Di Li Yanan Yang Jianxun Ding Feng Jin

Micelle with mesomeric polyleucine (PDLLeu) core demonstrated the most uniform morphology, the smallest diameter and the highest drug loading capability compared to those with dextrorotatory (PDLeu), levorotatory (PLLeu) and racemic PLeu (PD/LLeu) cores. In addition, the modification with c(RGDfC) endowed the optimal PDLLeu micelle with enhanced intracellular drug release and cytotoxicity, indicating its great potential for targeted drug delivery.

Nanocarriers

10.1039/c6bm00022c

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Citations (16)

PEGylated Polyurea Bearing Hindered Urea Bond for Drug Delivery

Molecules (2019)

Meishan Chen Xiangru Feng Weiguo Xu Yanqiao Wang Yanan Yang

In recent years, polyureas with dynamic hindered urea bonds (HUBs), a class of promising biomedical polymers, have attracted wide attention as a result of their controlled hydrolytic properties. The effect of the chemical structures on the properties of polyureas and their assemblies has rarely been reported. In this study, four kinds of polyureas with different chemical groups have been synthesized, and the polyureas from cyclohexyl diisocyanate and tert-butyl diamine showed the fastest hydrolytic rate. The amphiphilic polyurea composed of hydrophobic cyclohexyl-tert-butyl polyurea and hydrophilic poly(ethylene glycol) (PEG) was synthesized for the controlled delivery of the antitumor drug paclitaxel (PTX). The PTX-loaded PEGylated polyurea micelle more effectively entered into the murine breast cancer 4T1 cells and inhibited the corresponding tumor growth in vitro and in vivo. Therefore, the PEGylated polyurea with adjustable degradation might be a promising polymer matrix for drug delivery.

Polyurea

10.3390/molecules24081538

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Citations (14)

Oxidation of Cationic Red X-GRL by ozonation combined with UV radiation in aqueous solution: Degradation, kinetics, and modeling

Chemical Engineering Journal (2011)

Weirong Zhao Qiu-wen Liao Jing Zhang Yanan Yang Jiusong Dai

Cationic polymerization

Degradation

10.1016/j.cej.2011.03.105

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Citations (19)