Article
Engineering, Mechanical
Guanghui Zhang, Kefan Xu, Jiazhen Han, Yanzhong Huang, Wenjie Gong, Yang Guo, Zhongwen Huang, Xinyang Luo, Bo Liang
Summary: This paper investigates the performance of textured gas foil bearings. By examining different texture distribution types, the study analyzes the effects of relative texture depth and textured portion on the bearing's performance. The results indicate that appropriate texture arrangement can significantly enhance the performance of gas foil bearings.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2022)
Article
Engineering, Mechanical
Krishnkant Sahu, Satish C. Sharma, Nathi Ram
Summary: Misalignment affects the operation of the journal bearing system, and smart lubricants can enhance the performance of fluid film bearings. The study finds that journal misalignment reduces the fluid film thickness, increases the fluid film damping coefficient, and frictional torque.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Georg Schnell, Hauke Studemund, Robert Thomas, Hermann Seitz
Summary: This study investigates the effect of partial texturing on the tribological performance of journal bearings using the relatively new technique of femtosecond laser texturing. The research findings show that textures in the high-load region of journal bearings provide the highest lubricant film thickness and lowest friction. Moreover, asymmetric texture designs have a detrimental effect on lubrication performance compared to symmetric designs.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Xuewei Zhao, Shuhong Xiao
Summary: This study presents a three-dimensional model of gas foil bearings considering axial variation of structural deflection and investigates the effect of misalignment on bearing performance. The results indicate that second generation foil bearings exhibit better performance in the presence of misalignment.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Adam Martowicz, Jakub Roemer, Slawomir Kantor, Pawel Zdziebko, Grzegorz Zywica, Pawel Baginski
Summary: This paper discusses the perspective of using smart materials to enhance the properties of Gas Foil Bearings, focusing on Shape Memory Alloys, Piezoelectric Transducers, Thermoelectric Modules, and Thermocouples. The authors provide an overview of the known and potential applications of smart materials to Gas Foil Bearings, discussing their capabilities, limitations, and effectiveness based on available literature and experience. The unique characteristics and requirements of Gas Foil Bearings are taken into consideration in this discussion.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Mechanical
Chuanbing Zhang, Wenwei Sun, Yongjun Cheng, Bi Wang, Zixi Wang, Yuming Wang
Summary: A metal rubber-bump foil gas journal bearing with three structure pads (MR-BFGJBTSPs) is proposed to improve the low load-carrying capacity and poor operational stability of a foil-type gas journal bearing. An equivalent stiffness model for the metal rubber damping element is developed considering the different contact states. The predicted structure stiffness Kc of MR-BFGJBTSPs shows the best comparison to limited test data, and the load-carrying capacity increases with the increase in friction coefficients μtb and μbh.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Yongpeng Gu, Xudong Lan, Gexue Ren, Ming Zhou
Summary: An efficient 3D structural model for bump-type gas foil bearings considering friction has been proposed, using reduction and synthesis methods to improve computational efficiency. Results show significant differences in predicted reaction torques for misaligned bearings between 2D and 3D foil structure models, suggesting the use of the latter for studying misalignment in GFBs.
Article
Engineering, Mechanical
Runeng Zhou, Yongpeng Gu, Gexue Ren, Suyuan Yu
Summary: In this study, a comprehensive model was developed to investigate the effect of friction on the stability and frictional dissipation mechanism of gas foil bearing (GFB) rotor systems. The results revealed that the friction coefficient and disturbance magnitude affect the stick-slip states, which directly govern the dissipation capacity of the foil structure.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Jitesh Kumar, Debanshu S. Khamari, Suraj K. Behera, Ranjit K. Sahoo
Summary: The use of gas foil bearings in turbomachines has gained attention due to their advantages over simple gas lubricated bearings. Researchers have established a mathematical model for gas foil journal bearings under slip-flow condition and compared the performance parameters for slip-flow and no-slip conditions through numerical calculations and simulations.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Shaoyu Zhu, Xiangjun Zhang
Summary: The modified average Reynolds equation for friction pairs with arbitrary three-dimensional rough surfaces lubricated by couple stress fluid is derived. The performance parameters under various factors, such as couple stress, surface roughness, journal misalignment, and thermal effect, are obtained using the finite difference numerical method. The results show that the surface roughness factor plays an important role in the performance of the friction pairs, even with small nominal eccentricity ratios.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2022)
Article
Engineering, Mechanical
Hongyang Hu, Ming Feng, Tianming Ren
Summary: The addition of shim foil under the bump foil of gas foil journal bearings (GFJBs) can significantly increase the load capacity and direct stiffness, especially with the presence of preload, while also improving stability. The stability threshold speed (STS) of rotors supported by the novel GFJBs is enhanced, indicating better stability.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Aerospace
Yu ZHOU, Longtao SHAO, Can ZHANG, Fenzhu JI, Jiang LIU, Guo LI, Shuiting DING, Qi ZHANG, Farong DU
Summary: This paper presents a simple experimental method to obtain the minimum film thickness and dynamic stiffness of bump-type foil journal bearing (BFJB) using the journal orbit. Results show that the experimental and numerical results fluctuate initially due to dry friction, but agree well once a gas film is generated to separate the shaft from the top foil. The proposed experimental method effectively predicts film thickness and dynamic characteristics, and can be used to predict rotor-bearing systems dynamics.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Engineering, Marine
Weixin Zhou, Yao Zhao, Hua Yuan, Jingxi Liu, Xiaoqiang Wang
Summary: This paper uses the influence coefficient factors method to analyze the contact pressure of misaligned bearings. The results show that the influence coefficient factors are greatly affected by the shape and constraints of the contact object. The proposed method is suitable for cylindrical shell contact analysis and has the same accuracy as FEM with half of the time consumption.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Mechanical
P. Ganai, R. K. Pandey, J. K. Dutt
Summary: By using micro-groove, micro-pocket and texture on the top foil, significant improvements in the static and dynamic performance of a self-acting air foil journal bearing have been achieved. In particular, the micro-pocketed top foil has shown to reduce friction coefficient and enhance the performance stability of the bearing.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2021)
Article
Engineering, Mechanical
Chenfei Wang, Xiaoli Wang, Yanqiang Hu
Summary: This study develops a transient gas mixed lubrication-wear model for non-Gaussian surface to investigate the effects of wear topography evolution and initial surface parameters on the start-up performance of gas foil bearing (GFB). The results show that considering wear topography evolution leads to smaller standard deviation, skewness, and minimum lift-off speed in GFB.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Environmental Sciences
Yanzhong Huang, Xiaofeng Luo, Lin Tang, Weizhen Yu
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Environmental Sciences
Yanzhong Huang, Xiaofeng Luo, Di Liu, Sanxia Du, Aqian Yan, Lin Tang
Summary: The research found that the relationship between farmers' pest control ability and pesticide overuse depends on whether there is external technical guidance; guidance from government agrotechnical stations and pesticide retailers can weaken pesticide overuse caused by lack of personal ability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Agronomy
Yanzhong Huang, Xiaofeng Luo, Zhaoliang Li
Summary: This study investigates the prevalence of Chinese rice farmers' mixed use of biopesticides and chemical pesticides. It found that 59.18% of the sample rice farmers used a combination of both types of pesticides. Farmers justify this approach in order to ensure food safety and reduce costs, but it does not significantly increase rice yield or output value.
PEST MANAGEMENT SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Lin Tang, Xiaofeng Luo, Yanzhong Huang, Sanxia Du, Aqian Yan
Summary: This study explores the internal mechanism of smartphone use influencing farmers' decision-making by using the endogenous switching probit model, based on survey data of farmers in the Hubei and Henan provinces. The results show that smartphone use has a positive impact on farmers' willingness to participate in rural domestic sewage-centralized treatment, and there is a positive correlation between use intensity and willingness. In addition, smartphone use also indirectly affects willingness through the intermediary effects of information search costs, environmental awareness, and social capital.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Environmental Sciences
Yanzhong Huang, Zhaoliang Li, Xiaofeng Luo, Di Liu
Summary: The beneficial effects of agricultural extension of biopesticides adoption have been demonstrated, but the effectiveness of extension still needs to be improved. A survey of rice farmers in China shows that biopesticides extension can increase farmers' adoption probability by 10.3 to 11.7%. Technology demonstration is currently the best approach for extending biopesticides. Inadequate supply and demand of biopesticides contribute to the inefficiency of extension in China.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Huidong Xuan, Yanzhong Huang, Li Zhou, Sushuang Deng, Congcong Wang, Jianyu Xu, Haitang Wang, Jinming Zhao, Na Guo, Han Xing
Summary: In this study, comprehensive comparative transcriptome analyses were conducted to explore the molecular mechanisms of soybean drought tolerance. The results revealed that drought-tolerant genotype Jindou 21 (JD) exhibited better adaptation and drought resistance compared to drought-sensitive genotype Tianlong No.1 (N1) through multiple signal transduction pathways, transcription factors, and stress-related proteins.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Di Liu, Yanzhong Huang, Xiaofeng Luo
Summary: Based on survey data from Hubei Province, this study examines rice farmers' technology preferences for pesticide reduction in China and identifies the factors influencing farmers' adoption behavior. The results show that large-scale farmers prefer drone services and efficient machinery, while small-scale farmers prefer scientific standards and biopesticides. Factors such as education, risk attitude, scale, rice price, cost, and training significantly influence farmers' adoption level of pesticide reduction technologies.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Business
Zhaoliang Li, Yanzhong Huang, Yurong Yang, Xiaomin Lai
Summary: In the context of agricultural digitalisation in China, TikTok is becoming widely popular in rural areas and a novel way for agricultural technology extension. The study found that TikTok usage significantly increases farmers' adoption of Green Control Techniques (GCT), particularly for small-scale, older, and non-plain-area farmers. This has important implications for the promotion of agricultural technology.
ASIAN JOURNAL OF TECHNOLOGY INNOVATION
(2022)
Article
Area Studies
Lin Tang, Xiaofeng Luo, Weizheng Yu, Yanzhong Huang
JOURNAL OF CHINESE POLITICAL SCIENCE
(2020)
Article
Area Studies
Yanzhong Huang, Christopher J. Smith
EURASIAN GEOGRAPHY AND ECONOMICS
(2010)
Article
International Relations
Bates Gill, Yanzhong Huang