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Journal articles on the topic 'Oil jet lubrication'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Dai, Yu, Feiyue Ma, Xiang Zhu, Qiao Su, and Xiaozhou Hu. "Evaluation and Optimization of the Oil Jet Lubrication Performance for Orthogonal Face Gear Drive: Modelling, Simulation and Experimental Validation." Energies 12, no. 10 (2019): 1935. http://dx.doi.org/10.3390/en12101935.

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The oil jet lubrication performance of a high-speed and heavy-load gear drive is significantly influenced and determined by the oil jet nozzle layout, as there is extremely limited meshing clearance for the impinging oil stream and an inevitable blocking effect by the rotating gears. A novel mathematical model for calculating the impingement depth of lubrication oil jetting on an orthogonal face gear surface has been developed based on meshing face gear theory and the oil jet lubrication process, and this model contains comprehensive design parameters for the jet nozzle layout and face gear pa

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2

Hu, Xiaozhou, Pengfei Li, Can Quan, and Jianing Wang. "CFD Investigation on Oil Injection Lubrication of Meshing Spur Gears via Lattice Boltzmann Method." Lubricants 10, no. 8 (2022): 184. http://dx.doi.org/10.3390/lubricants10080184.

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The meshless Lattice Boltzmann Method (LBM) is introduced and employed to solve the complex two-phase flow problem of jet lubrication of meshing spur gears. Computational fluid dynamics (CFD) simulations based on LBM are carried out using the model of an oil jet impacting rotating gear presented by available experiments, which reveals how the liquid column is broken throughout the tooth tip cutting off the oil jet. Typical oil flow phenomena obtained by simulations are compared with experiments, demonstrating good qualitative agreement, which validates the feasibility of LBM to simulate the ai

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3

Gao, Shushen, Xiangying Hou, Chenfei Ma, et al. "Transient Simulation Analysis of Needle Roller Bearing in Oil Jet Lubrication and Planetary Gearbox Lubrication Conditions Based on Computational Fluid Dynamics." Lubricants 12, no. 2 (2024): 39. http://dx.doi.org/10.3390/lubricants12020039.

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The transient lubrication conditions of rolling bearings are different in gearboxes and bearing testers. It has been observed that samples of qualified rolling bearings tested in rolling bearing testers often fail and do not meet lifespan requirements when employed in other lubrication conditions. This may be caused by different factors affecting the bearing in testing and applying lubrication. Needle roller bearings were selected for this study to investigate the causes of this phenomenon in terms of lubrication. Based on the computational fluid dynamics (CFD) method, fluid domain models for

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4

Wei, Feng, Hongbin Liu, and Yongyan Liu. "Study on Atomization Mechanism of Oil Injection Lubrication for Rolling Bearing Based on Stratified Method." Lubricants 12, no. 10 (2024): 357. http://dx.doi.org/10.3390/lubricants12100357.

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The atomization mechanism of lubrication fluid in rolling bearings under high-speed airflow between the rings was investigated. A simulation model of gas–liquid two-phase flow in angular contact ball bearings was developed, and the jet lubrication process between the bearing rings was simulated using FLUENT computational fluid dynamics software (Ansys 19.2). The complex motion boundary conditions of the rolling elements were addressed through a layered approach. We can obtain more accurate boundary layer flow field changes and statistics of the diameter of oil particles in lubricating oil atom

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5

Shi, Chunxiang, Xiangkun Song, Weipeng Xu, et al. "SPH Simulation of Gear Meshing with Lubricating Fluid–Solid Coupling and Heat-Transfer Process." Processes 13, no. 3 (2025): 730. https://doi.org/10.3390/pr13030730.

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This study employs the meshfree Smoothed Particle Hydrodynamics (SPH) method to simulate the fluid–solid coupling process of gear meshing rotation with lubricating oil or oil jet lubrication fluids, considering the heat-transfer process under preset initial temperature conditions. While traditional grid methods face challenges in simulating the dynamic interaction between gear-meshing rotation and lubricating fluids, such as time-dependent contact in fluid–solid coupling and heat transfer, difficulties in handling meshing gaps, and the complexity of dynamic mesh setup, our approach leverages t

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6

Tang, Jichuan, Tianhao Wang, Huichuan Cheng, Xingyun Jia, Kening Li, and Decai Bian. "Design of Jet Control Device for Forced Lubrication System of Bearing." Journal of Physics: Conference Series 2694, no. 1 (2024): 012006. http://dx.doi.org/10.1088/1742-6596/2694/1/012006.

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Abstract In response to the problem of poor lubrication effect and unstable bearing operation leading to bearing failure in traditional bearings, the solution of installing a jet device on the bearing has been proposed. Using numerical calculation software, analyze the impact of installing a semi-circular or 1/4 circular jet device on the temperature field and leakage rate of the bearing. The results show that after installing a jet control device, the temperature of the flow field around the bearing decreases significantly at the same inlet pressure, while the leakage rate decreases. Keeping

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7

Dai, Yu, Xi Chen, Duan Yang, Lanjin Xu, and Xiang Zhu. "Performance of a New Aeronautic Oil-Guiding Splash Lubrication System." Lubricants 10, no. 6 (2022): 130. http://dx.doi.org/10.3390/lubricants10060130.

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Among ever-increasing demands for low power consumption, low weight, and compact reducer systems, an oil-guiding splash lubrication method integrating the oil-guiding cylinder and pipes is suggested to be more suitable for light helicopters, instead of conventional splash or oil jet lubrication. Aiming at improving the lubrication and cooling performance of this special lubrication method, this paper introduces an oil-guiding channel to increase oil quantity reaching the driving gear, bearings, and spline. Firstly, the lubrication and cooling effect of the oil-guiding channel in the main gearb

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8

Zou, Tiangang, Qingdong Yan, Wei Hou, Chunyu Wang, Ziqiang Zhang, and Junye Li. "Numerical Simulation and Experimental Study on the Role of Jet Angle in Controlling the Flow of Transmission Gears." Lubricants 13, no. 5 (2025): 225. https://doi.org/10.3390/lubricants13050225.

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Gears play an important role in modern machinery and are indispensable transmission components, particularly at high speeds, where lubrication is essential for the reliability and efficiency of the gear unit. In order to study the oil coverage law and heat dissipation mechanism of high-speed rotating meshing gears by injection angle, this paper adopts the moving particle semi-implicit method to establish a high-speed rotating gear lubrication model, study the intrinsic effect of different jet angles on gear lubrication, and build a gear lubrication bench for experimental verification. Numerica

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9

Yang, Duan, He Liu, Jianfeng Zhong, Xiang Zhu, and Yu Dai. "Influence of Nozzle Layouts on the Heat-Flow Coupled Characteristics for Oil-Jet Lubricated Spur Gears." Lubricants 11, no. 1 (2023): 25. http://dx.doi.org/10.3390/lubricants11010025.

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Aiming to explore the influence of nozzle layouts on the lubrication and cooling performance of spur gears under oil jet lubrication conditions, this paper introduces a heat-flow coupled analysis method to predict the temperature field of the tooth surface with different nozzle layouts. Firstly, the friction heat formulas integrating the coefficient of friction and average contact stress are presented for calculating heat generation. We also present the impingement depth model, which considers the nozzle orientation parameters, jet velocity, and gear structure of the given spur gear pair for l

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10

Yin, Mei, Xi Chen, Yu Dai, Duan Yang, Lanjin Xu, and Xiang Zhu. "Numerical and Experimental Investigation of Oil-Guiding Splash Lubrication in Light Helicopter’s Reducers." Aerospace 8, no. 11 (2021): 345. http://dx.doi.org/10.3390/aerospace8110345.

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Limited by the space and weight of the reducer, it is difficult to use traditional oil-jet lubrication and splash lubrication for a light helicopter, so an oil-guiding splash lubrication method is adopted as a research object in this paper. Firstly, the lubrication performance of the oil-guiding cylinder in the main reducer under different rotating speeds, oil levels, and flight attitudes is investigated based on the computational fluid dynamics (CFD) method. Then, a specific test rig is developed, and lubrication tests are carried out to verify the feasibility and correctness of the simulatio

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11

Dai, Yu, Jifu Jia, Bin Ouyang, and Jianeng Bian. "Determination of an Optimal Oil Jet Nozzle Layout for Helical Gear Lubrication: Mathematical Modeling, Numerical Simulation, and Experimental Validation." Complexity 2020 (May 12, 2020): 1–18. http://dx.doi.org/10.1155/2020/2187027.

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To provide a basic guidance for the selection of nozzle layout, a mathematical model of the impingement depth for helical gears under oil jet lubrication is established. Furthermore, computational fluid dynamics (CFD) methods are adopted to validate the effectiveness and accuracy of the derived impingement model. Firstly, the distribution characteristics of the oil volume fraction and oil-gas pressure in meshing area were obtained in flow field simulation. Meanwhile, the influence of spray angle, jet velocity, and gear ratio on lubrication effect was obtained. Then, the transient temperature f

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12

Hu, Xiaozhou, Yangmei Yuan, and Jie Chen. "Study on Temperature Field Distribution of a High-Speed Double-Helical Gear Pair with Oil Injection Lubrication." Lubricants 12, no. 9 (2024): 315. http://dx.doi.org/10.3390/lubricants12090315.

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The temperature field distribution of high-speed double-helical gears under oil injection lubrication is investigated by obtaining heat flux density and convective heat transfer coefficients through theoretical calculations and CFD (computational fluid dynamics) simulations. Based on the CFD method, fluid simulations are performed to obtain the distribution of lubricating oil on the surface of the double-helical gears, the velocity streamline diagram of the lubricating oil, and the convective heat transfer coefficients of different surfaces of the gears. The friction heat flux density is calcu

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13

Niu, Wentao, Yanzhong Wang, Yanyan Chen, and Guanhua Song. "Air barrier effect in out of mesh jet lubrication of ultra-high speed spur gears." Industrial Lubrication and Tribology 69, no. 2 (2017): 81–87. http://dx.doi.org/10.1108/ilt-12-2015-0208.

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Purpose This paper aims to reveal the mechanism of air barrier effect in jet lubrication and to figure out the influence of gear parameters and conditions on air barrier, thus providing guidance to the design of jet lubrication in ultra-high speed gear cooling system. Design/methodology/approach The computational fluid dynamics method is used to calculate the flow and pressure of ultra-high speed gears. The flow and pressure distributions are obtained under different gear parameters and working conditions, so their variations are obtained. A multiphase flow model is established to simulate the

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14

Wang, Lin, Ze-kai Du, Yong Wang, Zhi-zhen Zheng, and Guo-ding Chen. "Temperature measurement and error analysis of the transverse plane of oil-jet-lubrication herringbone gear with infrared pyrometers." Review of Scientific Instruments 94, no. 2 (2023): 024902. http://dx.doi.org/10.1063/5.0098729.

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Frictional power losses of high-speed and heavy-load herringbone gearboxes increase the temperature of the gearbox. Thus, real-time surface temperature measurement is significant for evaluating the gearbox lubrication design. A rotating gear test rig with an infrared pyrometer is developed in this paper to conduct real-time and accurate temperature measurements of the transverse plane of the oil-jet-lubrication herringbone gear. First, the influencing factors and measuring errors of surface temperature are analyzed using the infrared pyrometer. The emissivity of the measured surface of a gear

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15

Fushimi, Akihiro, Katsumi Saitoh, Yuji Fujitani, and Nobuyuki Takegawa. "Identification of jet lubrication oil as a major component of aircraft exhaust nanoparticles." Atmospheric Chemistry and Physics 19, no. 9 (2019): 6389–99. http://dx.doi.org/10.5194/acp-19-6389-2019.

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Abstract. Jet engine aircraft are ubiquitous and significant sources of atmospheric nanoparticles. Using size-resolved particulate samples collected near a runway of the Narita International Airport, Japan, we clearly demonstrate that organic compounds in the ambient nanoparticles (diameters: < 30 nm) were dominated by nearly intact forms of jet engine lubrication oil. This finding provides direct evidence for the importance of unburned lubrication oil as a source of aircraft exhaust nanoparticles and also has an implication for their environmental impacts near airports and in the upper tro

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16

Saitoh, Katsumi, Akihiro Fushimi, Koichiro Sera, and Nobuyuki Takegawa. "Elemental analysis of jet engine lubrication oil and jet fuel using in-air PIXE." International Journal of PIXE 28, no. 03n04 (2018): 85–92. http://dx.doi.org/10.1142/s0129083518500171.

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To understand the elemental characteristics of the exhaust particles from a jet aircraft, we performed an element analysis using an in-air PIXE system of the different lubrication oils of a jet engine (Mobil Jet Oil II, Mobil Jet Oil 254 and Eastman Turbo Oil 2380) and the jet fuel (JET A-1) to determine the effects on the exhaust particles. A high concentration (1,400–2,500 wt.-ppm) of P was detected from the analyzed three oil samples. The high concentration of P is probably due to the tricresyl phosphate (TCP: C[Formula: see text]H[Formula: see text]O4P) contained in the oil samples. The S

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17

Zi, Xintian, Kai Chen, Qinghua Bai, et al. "The Enhancement of Oil Delivery and Bearing Performance via A Guiding-Structured Nozzle under Oil–Air Lubrication." Lubricants 12, no. 2 (2024): 60. http://dx.doi.org/10.3390/lubricants12020060.

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The oil–air lubrication method is specifically employed for high or ultra-high-speed spindle rolling bearings. Under high-speed conditions, the air curtain formed inside the bearing cavity obstructs oil delivery, thereby limiting further increases in spindle rotation speed. To enhance oil delivery capability, a guiding-structured nozzle has been developed to concentrate the jet flow and improve penetration through the air curtain. Tests were conducted on an oil–air lubricated bearing test bench to investigate the impact of nozzle structures and oil types on torque and temperature rise. The res

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18

Ponsonby, Joel, Leon King, Benjamin J. Murray, and Marc E. J. Stettler. "Jet aircraft lubrication oil droplets as contrail ice-forming particles." Atmospheric Chemistry and Physics 24, no. 3 (2024): 2045–58. http://dx.doi.org/10.5194/acp-24-2045-2024.

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Abstract. The radiative characteristics and lifetimes of contrails are dependent on the number concentration of ice-forming particles in the engine exhaust plume. Aircraft gas turbine engines produce a variety of particles, yet it is understood that non-volatile black carbon aggregates are the dominant source of ice-forming particles with typical, fossil-derived jet fuel. However, with cleaner combustion technologies and the adoption of alternative fuels (e.g. hydrogen or synthetic aviation fuel), non-volatile black carbon particle emissions are expected to decrease or even be eliminated. Unde

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19

Wang, Jin Li, Li Quan Li, and Lin Cai. "The Numerical Study of Oil Drop Jet from Oil-Air Lubrication Nozzle." Advanced Materials Research 201-203 (February 2011): 361–64. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.361.

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Nozzle is an important part of oil-air lubrication system. This paper uses Computational Fluid Dynamics (CFD) software FLUENT to study the flow field of oil air, and different air pressure and nozzle throat size are discussed. The results show that: When air pressure is increased from 0.05Mpa to 0.1Mpa, the maximum diameter (2mm) percentage reduces, but the diameters distribution is almost unchanged as the air pressure is increased to 0.3MPa. The throat diameter is decreased, the mean Sauter diameter of oil drop reduces. This paper will provide a theoretical basis for oil-air lubrication nozzl

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20

Li, Linlin, Sanmin Wang, Xuyang Zhang, Zhibin Li, Fei Li, and Haoran Zou. "Numerical Calculation Analysis and Characteristic Research on Windage Loss of Oil-Jet Lubricated Aviation Gear Pair." International Journal of Aerospace Engineering 2022 (February 8, 2022): 1–15. http://dx.doi.org/10.1155/2022/7499587.

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The VOF (volume of fluid) multiphase transient simulation model of the windage loss of the gear pair under oil-jet lubrication was carried out by using the dynamic mesh technology with the powerful parallel computing capabilities of the Super Cloud Computing Center. Firstly, a two-phase (oil-gas) turbulence numerical model was established in the process of oil-jet lubrication. The numerical simulation test was designed by orthogonal experiment. The influence of the oil-jet lubrication parameters and their interaction on the windage power loss was studied by means of variance analysis. The resu

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21

Stanković, Miloš, Nenad Kolarević, Nikola Davidovic, and Marko Miloš. "Influence of the air pressure and oil amount to the temperature of the high-speed bearings lubricated by oil mist." Industrial Lubrication and Tribology 74, no. 3 (2021): 335–41. http://dx.doi.org/10.1108/ilt-06-2021-0222.

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Purpose The purpose of this paper is to improve the lubrication and remove as much as possible of the heat generated in the bearing assembly, embedded in the jet engine. Design/methodology/approach To determine the necessary values of the air pressure and oil amount, an experimental approach is used. For that purpose, a custom made test rig is developed. Findings Less amount of oil makes better lubrication conditions, reflected in the smaller temperature of the bearings. Concerning the air pressure, too high and too low air pressure deteriorates the lubrication parameters. An optimum value sho

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22

Dai, Yu, Chongyu Liang, Xi Chen, and Xiang Zhu. "Numerical Analysis for Wetting Behaviors of an Oil Jet Lubricated Spur Gear." Lubricants 10, no. 2 (2022): 17. http://dx.doi.org/10.3390/lubricants10020017.

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As it is widely employed in the aeronautical transmission system, a better understanding of the oil jet lubrication behavior is vital to determine the total system energy consumption. Firstly, this study presents related theoretical models such as the sum of oil jet resistance torque, impingement depth, and wetted area of the oil film for calibrating the physical characteristics of the impact of the oil jet on the gear flank. Then, in terms of the flow phenomenology of the liquid column for the oil jet impact on an isolated spur gear, a detailed transient and spatial flow field analysis become

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23

Zhao, Wentao, Lin Li, and Gaoan Zheng. "A Study on the Influence Mechanism of the Oil Injection Distance on the Oil Film Distribution Characteristics of the Gear Meshing Zone." Machines 13, no. 7 (2025): 606. https://doi.org/10.3390/machines13070606.

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Under the trend of lightweight and high-efficiency development in industrial equipment, precise regulation of lubrication in gear reducers is a key breakthrough for enhancing transmission system efficiency and reliability. This study establishes a three-dimensional numerical model for high-speed gear jet lubrication using computational fluid dynamics (CFD) and dynamic mesh technology. By implementing the volume of fluid (VOF) multiphase flow model and the standard k-ω turbulence model, the study simulates the dynamic distribution of lubricant in gear meshing zones and analyzes critical paramet

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24

Putintsev, S. V., S. S. Strelnikova, and S. A. Anikin. "Calculation and identification of the coordinate of oil jet ejection from the gap of a rotating connecting rod bearing." Traktory i sel'hozmashiny 1, no. 5 (2020): 25–32. http://dx.doi.org/10.31992/0321-4443-2020-5-25-32.

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The development of a modern high-speed, energy-efficient and reliable diesel engine requires high-quality lubrication of all friction parts in general and parts of the cylinder-piston group (CPG) in particular. The relevance of this research is due to the insufficient study of the process of oil jet supply of CPG parts, implemented in combined lubrication systems of modern high-speed four-stroke engines and significantly affecting the processes of friction, wear and scuffing of parts of this group. The analysis of previously performed works in this area has shown the feasibility of not only se

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25

Ozasa, Toshihiro, Takashi Noda, and Toshiaki Konomi. "Elastohydrodynamic Lubrication Model of Connecting Rod Big-End Bearings: Application to Real Engines." Journal of Tribology 119, no. 3 (1997): 568–78. http://dx.doi.org/10.1115/1.2833538.

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This study presents an elastohydrodynamic (EHD) lubrication model of connecting rod big-end bearings developed taking into consideration the effects of inertia and oil holes. In this model, the effect of inertia, namely the body force, on load and deformation is practically and rationally expressed based on engine dynamics and a structural model of a connecting rod. A method of defining the deformation of bearings has been proposed to simplify numerical analysis. The effect of oil holes, namely an oil feed hole in a journal and an oil jet hole in a bearing, is considered as a boundary conditio

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26

Fondelli, Tommaso, Antonio Andreini, Riccardo Da Soghe, Bruno Facchini, and Lorenzo Cipolla. "Numerical Simulation of Oil Jet Lubrication for High Speed Gears." International Journal of Aerospace Engineering 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/752457.

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The Geared Turbofan technology is one of the most promising engine configurations to significantly reduce the specific fuel consumption. In this architecture, a power epicyclical gearbox is interposed between the fan and the low pressure spool. Thanks to the gearbox, fan and low pressure spool can turn at different speed, leading to higher engine bypass ratio. Therefore the gearbox efficiency becomes a key parameter for such technology. Further improvement of efficiency can be achieved developing a physical understanding of fluid dynamic losses within the transmission system. These losses are

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27

Bianchi, Eduardo C., Rafael L. Rodriguez, Rodolfo A. Hildebrandt, et al. "Application of the auxiliary wheel cleaning jet in the plunge cylindrical grinding with Minimum Quantity Lubrication technique under various flow rates." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 4 (2018): 1144–56. http://dx.doi.org/10.1177/0954405418774599.

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Minimum Quantity Lubrication is an alternative technique to conventional techniques that are related to environmental sustainability and economic benefits. This technique promotes the substantial reduction of the amount of coolant employed in machining processes, representing a mitigation of risks to people’s health that are involved with the process. On the other hand, it has been reported in the literature that some problems of using the Minimum Quantity Lubrication technique can impair the grinding efficiency. One of these problems is associated with wheel clogging phenomenon, which is caus

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Sahoo, Sarthak Prasad, and Saurav Datta. "Machining response of Ti64 alloy under Nanofluid Minimum Quantity Lubrication (NFMQL)." E3S Web of Conferences 309 (2021): 01087. http://dx.doi.org/10.1051/e3sconf/202130901087.

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Rapid wear progression of cutting insert associated with attainment of excessive tool-tip temperature are indispensable causes which limit operational domain of cutting velocity during dry turning of Ti64 alloy. Again, to counteract demerits of flood cooling, jet of air-oil mist (MQL technology) is employed in which water-based coolants or vegetable oils are highly preferable. On the other hand, inclusion of nano-additives within base fluid, and supply the same through MQL system (NFMQL) is also a trendy area of research. Application potential of NFMQL is understood over conventional MQL in te

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29

Jiang, Le, Yaguo Lyu, Yanjun Li, Yewei Liu, Yankun Hou, and Zhenxia Liu. "Numerical and Experimental Investigations to Assess the Impact of an Oil Jet Nozzle with Double Orifices on the Oil Capture Performance of a Radial Oil Scoop." Aerospace 10, no. 12 (2023): 1015. http://dx.doi.org/10.3390/aerospace10121015.

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To study the influence of orifice spacing on the oil–air two-phase flow and the oil capture efficiency of an oil scoop in an under-race lubrication system, an experimental platform for under-race lubrication was built, and a calculation model for the oil–air two-phase flow field was established. The rationality of the experiment and the validity of the numerical model were verified by comparing the experimental and numerical results. The results showed that under the same oil supply pressure, the captured oil mass flow rate of the double-orifice structure was much higher than that of the singl

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Wen, Baogang, Yemin Li, Meiling Wang, and Yang Yang. "Measurement for Lubricant Distribution in an Angular Contact Ball Bearing and Its Influence Investigation." Lubricants 11, no. 2 (2023): 63. http://dx.doi.org/10.3390/lubricants11020063.

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Oil lubrication is widely adopted in rolling bearings, the characteristics of which affect the oil film formation and friction state, and also the heat generation and dissipation characteristics. However, it is difficult to measure the internal lubrication of rolling bearings in practice, which is of great importance for lubrication and structure design. In this work, one measurement system for lubricant distribution was built and installed on a test rig to obtain original pictures of the lubricant in bearings. Grayscale images were obtained by picture processing to characterize the lubricant

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Liu, Xiaochu, Xiujie Chen, Zhongwei Liang, et al. "The Tribological Properties of 30CrMnSiA Bearing Steels Treated by the Strengthening Grinding Process under Lubrication Wear." Materials 15, no. 20 (2022): 7380. http://dx.doi.org/10.3390/ma15207380.

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This study used the strengthening grinding process (SGP) to treat the surface of 30CrMnSiA bearing steels. The effect of the jet angle of SGP on the tribological properties of 30CrMnSiA bearing steels under lubrication was investigated. The principle of enhancing wear resistance of 30CrMnSiA bearing steel ascribed to SGP was discussed in detail. The results showed that the lubrication properties and surface hardness of the 30CrMnSiA steels were enhanced due to the formation of numerous microscale microscope oil pockets on the surface layer and the grain refinement of the surface microstructure

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32

Massini, Daniele, Tommaso Fondelli, Bruno Facchini, Lorenzo Tarchi, and Federico Leonardi. "High Speed Visualizations of oil Jet Lubrication for Aero-engine Gearboxes." Energy Procedia 101 (November 2016): 1248–55. http://dx.doi.org/10.1016/j.egypro.2016.11.140.

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Mirea, Radu, and Grigore Cican. "Theoretical Assessment of Different Aviation Fuel Blends based on their Physical-Chemical Properties." Engineering, Technology & Applied Science Research 14, no. 3 (2024): 14134–40. http://dx.doi.org/10.48084/etasr.6524.

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The current study focuses on the theoretical assessment of Sustainable Aviation Fuels (SAFs) obtained by blending traditional jet fuel (Jet A) and different liquids (biodiesel and alcohols) from an analytical point of view. Aeroshell 500 oil was added (5% vol.) to ensure the lubrication of the turbo engine. An in-depth analysis of the physical-chemical properties of Jet A fuel blended with different biodiesels and alcohols was performed. The considered blends consisted of Jet A fuel and biodiesel from palm oil, pork fat, and sunflower and methanol, ethanol, and butanol. All six liquids were mi

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Dai, Y., W. Wu, H. B. Zhou, J. Zhang, and F. Y. Ma. "Numerical Simulation and Optimization of Oil Jet Lubrication for Rotorcraft Meshing Gears." International Journal of Simulation Modelling 17, no. 2 (2018): 318–26. http://dx.doi.org/10.2507/ijsimm17(2)co6.

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Liu, Jinyu, Yu Su, and Pan Liu. "The formation process and mechanism of coaxial electrostatic atomization of nanofluid oil film droplets." Journal of Physics: Conference Series 2819, no. 1 (2024): 012072. http://dx.doi.org/10.1088/1742-6596/2819/1/012072.

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Abstract In coaxial electrostatic atomization cutting, the atomization effect of nanofluid oil film droplets directly affects the cooling and lubrication performance. To further understand the formation process of tiny oil film water droplets in coaxial electrostatic atomization, this paper takes LB2000/water, LB2000/0.1 vol.% graphite water-based nanofluids, LB2000/0.3 vol.% graphite water-based nanofluids, LB2000/0.5 vol.% graphite water-based nanofluids as the research object. Coaxial electrostatic atomization simulation is carried out based on the determined common voltage of the conical j

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Доценко, В. М., та Ю. В. Ковеза. "ВПЛИВ УМОВ РОБОТИ НА ТЕМПЕРАТУРНИЙ РЕЖИМ ПІДШИПНИКІВ З МЕТАЛЕВИМИ ТА КЕРАМІЧНИМИ КУЛЬКАМИ". Open Information and Computer Integrated Technologies, № 98 (15 квітня 2024): 69–76. http://dx.doi.org/10.32620/oikit.2023.98.06.

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The results of an experimental study of the temperature mode of operation of rolling bearings under different lubrication conditions are presented. Comparative tests of all-metal bearings and similar bearings with rolling elements made of silicon nitride (hybrid bearings) when lubricated with an oil jet and an oil-air mixture in the range of rotor rotation frequencies from 0 to 35000 rpm were carried out. For the experiments, a specially created set was used, which allows you to study the temperature of the bearings and the temperature of the lubricant at the entrance and exit from the bearing

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Babic, D. M., Andrew Torrance, and D. B. Murray. "Soap Mist Jet Cooling of Grinding Processes." Key Engineering Materials 291-292 (August 2005): 239–44. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.239.

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Grinding, like other abrasive processes, may generate high local temperatures along the arc of cut. These can cause various forms of surface damage in the most sensitive finishing phase of the manufacturing cycle. Traditional cooling methods based on large amounts of water-oil emulsions can be both ineffective and environmentally unacceptable. A new approach to this problem has been devised utilizing the high penetrative power of fast air jets combined with a water/soap mist to greatly improve convective cooling and lubrication along the arc of cut. The results obtained offer striking improvem

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Ma, Hao, and Min Yang. "Mechanism and Experimental Study on Electrostatic Atomization Using Needle-Shaped Electrodes." Lubricants 11, no. 6 (2023): 235. http://dx.doi.org/10.3390/lubricants11060235.

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The conventional pneumatic Minimum Quantity Lubrication (MQL), when not properly designed, may have poor atomization and insufficient wetting performance, resulting in higher oil mist concentration and poor film formation ability in the cutting zone. The intervention of an external electric field can change the atomization mechanism of microdroplets and enhance the lubrication and cooling capability of MQL. However, the mechanism of the effect of jet parameters on the atomization performance of Electrostatic Minimum Quantity Lubrication (EMQL) under the synergistic effect of multiple fields ha

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Keller, M. C., C. Kromer, L. Cordes, C. Schwitzke, and H. J. Bauer. "CFD study of oil-jet gear interaction flow phenomena in spur gears." Aeronautical Journal 124, no. 1279 (2020): 1301–17. http://dx.doi.org/10.1017/aer.2020.44.

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ABSTRACTOil-jet lubrication and cooling of high-speed gears is frequently employed in aeronautical systems, such as novel high-bypass civil aero engines based on the geared turbofan technology. Using such oil-jet system, practitioners aim to achieve high cooling rates on the flanks of the highly thermally loaded gears with minimum oil usage. Thus, for an optimal design, detailed knowledge about the flow processes is desired. These involve the oil exiting the nozzle, the oil impacting on the gear teeth, the oil spreading on the flanks, the subsequent oil fling-off, as well as the effect of the

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Van Treuren, K. W., D. N. Barlow, W. H. Heiser, M. J. Wagner, and N. H. Forster. "Investigation of Vapor-Phase Lubrication in a Gas Turbine Engine." Journal of Engineering for Gas Turbines and Power 120, no. 2 (1998): 257–62. http://dx.doi.org/10.1115/1.2818113.

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The liquid oil lubrication system of current aircraft jet engines accounts for approximately 10–15 percent of the total weight of the engine. It has long been a goal of the aircraft gas turbine industry to reduce this weight. Vapor-Phase Lubrication (VPL) is a promising technology to eliminate liquid oil lubrication. The current investigation resulted in the first gas turbine to operate in the absence of conventional liquid lubrication. A phosphate ester, commercially known as DURAD 620B, was chosen for the test. Extensive research at Wright Laboratory demonstrated that this lubricant could re

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Ungeheuer, Florian, Dominik van Pinxteren, and Alexander L. Vogel. "Identification and source attribution of organic compounds in ultrafine particles near Frankfurt International Airport." Atmospheric Chemistry and Physics 21, no. 5 (2021): 3763–75. http://dx.doi.org/10.5194/acp-21-3763-2021.

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Abstract. Analysing the composition of ambient ultrafine particles (UFPs) is a challenging task due to the low mass and chemical complexity of small particles, yet it is a prerequisite for the identification of particle sources and the assessment of potential health risks. Here, we show the molecular characterization of UFPs, based on cascade impactor (Nano-MOUDI) samples that were collected at an air quality monitoring station near one of Europe's largest airports, in Frankfurt, Germany. At this station, particle-size-distribution measurements show an enhanced number concentration of particle

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Pinel, Stanley I., Hans R. Signer, and Erwin V. Zaretsky. "Comparison Between Oil-Mist and Oil-Jet Lubrication of High-Speed, Small-Bore, Angular-Contact Ball Bearings." Tribology Transactions 44, no. 3 (2001): 327–38. http://dx.doi.org/10.1080/10402000108982465.

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Concli, Franco, and Marco N. Mastrone. "Advanced Lubrication Simulations of an Entire Test Rig: Optimization of the Nozzle Orientation to Maximize the Lubrication Capability." Lubricants 11, no. 7 (2023): 300. http://dx.doi.org/10.3390/lubricants11070300.

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In the framework of the H2020 project IDERPLANE, aimed at providing innovative, effective, and validated criteria for the design and assessment of more reliable planet bearings for aerospace application analyzing the problem from a damage tolerance perspective, the present paper presents the numerical study and optimization of a test rig specifically designed for the experiments on the full-test article. Specifically, for the first time ever, an entire system including shafts, gears and bearings with all the rolling elements have been studied with a Finite Volume Computational Fluid Dynamics a

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Dattatraya, P. Kshirsagar, and Venkatesh M.A. "A critical review on minimum quantity lubrication using biodegradable hybrid nano fluids of machining operation." Abstracts of International Conferences & Meetings (AICM) 1, no. 5 (2021): 22. https://doi.org/10.5281/zenodo.5374641.

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<strong>Abstract: </strong>Turning is one of the key and crucial processes of metal removal in industry. Increasing pollution preventing initiatives world over and consumer focus on environmentally conscious products has put increased pressure on industries to minimize or eliminate the use of cutting fluids. In the present study carried out the review work should be given to research topics aiming at the selection of hybrid nano materials and vegetable oil with the combination of biodegradable hybrid nano fluid using Minimum Quantity Lubrication assisted with turning operation based on the AIS

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Meier, T., D. Gross, and N. Hanenkamp. "COMPARISON OF SPRAYABILITY AND SOLUBILITY OF BIO-BASED LUBRICANTS WITH LIQUID CARBON DIOXIDE." MM Science Journal 2021, no. 5 (2021): 5077–84. http://dx.doi.org/10.17973/mmsj.2021_11_2021155.

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In recent years, cryogenic minimum quantity lubrication (CMQL) has been established in comparison to pure cryogenic cooling. The used oil has a crucial influence on the success of the technology. The aim of this study is to investigate the influence of oils from renewable resources with regard to their miscibility with carbon dioxide (CO2) and their spraying behavior. Ten different bio-based oils (synthetic ester, natural ester and fatty alcohol) have been examined regarding their suitability for CMQL compared to a conventional mineral hydrocrack oil. A validation based on sprayability and sol

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Obata, Fumio, Hisayuki Yamaura, Hisataka Tanaka, Kazuo Morioka, and Hideo Mitsudo. "Centrifugal Lubrication of Spur Gears. (1st Report, Behavior and Flow Rate of Oil Jet)." Transactions of the Japan Society of Mechanical Engineers Series C 60, no. 573 (1994): 1783–90. http://dx.doi.org/10.1299/kikaic.60.1783.

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Liu, Jinyu, Yu Su, and Jiaxi You. "Simulation of coaxial electrostatic atomization of nanofluids." Journal of Physics: Conference Series 2820, no. 1 (2024): 012107. http://dx.doi.org/10.1088/1742-6596/2820/1/012107.

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Abstract The microscopic characteristics of the coaxial electrostatic atomization of nanofluids have a very important impact on the field of cooling and lubrication. In this paper, a finite element model of coaxial electrostatic atomization of nanofluids is established by using the ternary phase field method in the voltage range of stable cone jets, and different outer and inner fluids are simulated to compare the influence of different inner and outer fluid types on the formation of cone jets and the broken droplets at the end of the coaxial electrostatic atomization of nanofluids. The result

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da Silva, E. J., E. C. Bianchi, J. F. G. de Oliveira, and P. R. de Aguiar. "Evaluation of grinding fluids in the grinding of a martensitic valve steel with CBN and alumina abrasives." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 217, no. 8 (2003): 1047–55. http://dx.doi.org/10.1177/095440540321700802.

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In this paper the performances of different cutting fluids and grinding wheel types were analysed in the grinding of SAE HVN-3 workpieces. The resulting residual stress, wheel wear and roughness were evaluated. The influence of the cutting fluid jet velocity vj was also analysed. As a conclusion, the lubrication ability seems to be the governing factor in the cutting fluid performance. The use of CBN wheels can significantly reduce the thermal damage in grinding, leading to compressive residual stresses. The CBN wheel and the cutting oil give an optimum combination for performing this grinding

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Darul, Lionel, Thomas Touret, Christophe Changenet, and Fabrice Ville. "Power Loss Analysis of an Oil-Jet Lubricated Angular Contact Ball Bearing: Theoretical and Experimental Investigations." Lubricants 12, no. 1 (2024): 14. http://dx.doi.org/10.3390/lubricants12010014.

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This study presents a theoretical and experimental analysis to quantify the power losses generated by an oil jet lubricated angular contact ball bearing. The analysis is conducted for a moderate speed range (N∙dm product less than 106) and a limited applied load (<5% of the static capacity). The lubrication regime of each ball is studied through a theoretical model and varies from Iso-Viscous Rigid to Elasto-Hydrodynamic. Therefore, the hydrodynamic effects are considered in the power loss calculation. An experimental campaign is carried out and the influence of several parameters (applied

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Ouyang, Bin, Feiyue Ma, Yu Dai, and Yanyang Zhang. "Numerical analysis on heat-flow-coupled temperature field for orthogonal face gears with oil–jet lubrication." Engineering Applications of Computational Fluid Mechanics 15, no. 1 (2021): 762–80. http://dx.doi.org/10.1080/19942060.2021.1918259.

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