Guoding Chen
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View article: Analysis of oil shedding and ligaments formation on bearing rotary elements
Analysis of oil shedding and ligaments formation on bearing rotary elements Open
For designing efficient lubrication system of an aeroengine bearing chamber, sufficient knowledge on oil/air two-phase flow characteristics is required. When analyzing bearing chamber two-phase flow, the essential prerequisite is quantifyi…
View article: A 3D CFD simulation of oil spray-collection and delivery process in an aeroengine inter-shaft bearing
A 3D CFD simulation of oil spray-collection and delivery process in an aeroengine inter-shaft bearing Open
Under-race lubrication applied to the inter-shaft bearing of aeroengine is characterized by spray oil collection and oil delivery to the bearing via flow-path structure. Droplet splashing induced by the collision between spray oil and the …
View article: Study on the Leakage and Inter-Stage Pressure Drop Characteristics of Two-Stage Finger Seal
Study on the Leakage and Inter-Stage Pressure Drop Characteristics of Two-Stage Finger Seal Open
To solve the high leakage and high wear problems faced by sealing devices in aeroengines under the condition of high axial pressure difference, the two-stage finger seal is proposed in this paper. The finite element method and computationa…
View article: Numerical Simulation of the Oil Droplet Size Distribution Considering Coalescence and Breakup in Aero-Engine Bearing Chamber
Numerical Simulation of the Oil Droplet Size Distribution Considering Coalescence and Breakup in Aero-Engine Bearing Chamber Open
In order to improve the inadequacy of the current research on oil droplet size distribution in aero-engine bearing chamber, the influence of oil droplet size distribution with the oil droplets coalescence and breakup is analyzed by using t…
View article: Performance analysis of compliant cylindrical intershaft seal
Performance analysis of compliant cylindrical intershaft seal Open
To improve the intershaft seal performance of the dual-rotor turbofan engine and extend the life of the intershaft seal, a compliant cylindrical aerodynamic intershaft seal structure is proposed, which avoids the problem of leakage increas…
View article: Analysis of Oil Droplet Deposition Characteristics and Determination of Impact State Criterion in Aero-Engine Bearing Chamber
Analysis of Oil Droplet Deposition Characteristics and Determination of Impact State Criterion in Aero-Engine Bearing Chamber Open
The research of oil/air two-phase flow and heat transfer is the fundamental work of the design of lubrication and heat transfer in aero-engine bearing chamber. The determination of impact state criterion of the moving oil droplets with the…
View article: Study of Morphology and Secondary Droplet Behaviors during Droplets Impacting on Static Hot Film
Study of Morphology and Secondary Droplet Behaviors during Droplets Impacting on Static Hot Film Open
The phenomenon of droplet impacting on hot film exists widely in nature and engineering applications. Considering limitations in current researches, an experimental setup to record the process of droplets impacting on hot film was built in…
View article: Effects of thermal and elastic deformations on lubricating properties of the textured journal bearing
Effects of thermal and elastic deformations on lubricating properties of the textured journal bearing Open
Hydrodynamic journal bearing is an important part of rotary machine and faces many challenges such as high rotating speed, heavy specific pressure, and large temperature rise with the development of industry. These challenges lead to notab…
View article: Influence of Geometric Error of Rollers on Rotational Accuracy of Cylindrical Roller Bearings
Influence of Geometric Error of Rollers on Rotational Accuracy of Cylindrical Roller Bearings Open
As the rotation of roller bearings is carried out under geometrical constraint of the inner ring, outer ring and multiple rollers, the motion error of the bearing should also be resulted from geometric errors of bearing parts. Therefore, i…
View article: Thermo-Elastohydrodynamic Study on Textured Journal Bearing with High-Speed and High-Specific-Pressure
Thermo-Elastohydrodynamic Study on Textured Journal Bearing with High-Speed and High-Specific-Pressure Open
The performance of supporting journal bearing of the star gear transmission system in the geared turbo fan engine (GTF) is analyzed. A thermal-elastohydrodynamic analysis model was developed for textured journal bearing used in high-speed …
View article: Temperature charateristics of droplet impacting on static hot pool
Temperature charateristics of droplet impacting on static hot pool Open
创建了“高速-红外”同步摄影装置, 并利用该装置开展了大量的冷液滴/热液池碰撞实验, 观测了冷液滴/热液池碰撞过程中混合换热区域的形态及温度变化, 分析了工况条件对碰撞过程中冷热液体混合换热的影响, 并建立了碰撞混合换热区域平均温度与工况条件间无量纲关系. 通过研究发现: 冷液滴/热液池碰撞区域温度迅速升高的主要原因为冷/热液体发生了混合; 在碰撞初始阶段, 冷液滴并没有与热液池迅速融为一体, 而是以新月状“变形液滴”的形式存在; 在中心射流向上移动的过程中, 正在混合的冷…
View article: Thermoelastohydrodynamic analysis of misaligned bearings with texture on journal surface under high-speed and heavy-load conditions
Thermoelastohydrodynamic analysis of misaligned bearings with texture on journal surface under high-speed and heavy-load conditions Open
Hydrodynamic journal bearings are used to support the planetary gears in the transmission system of a Geared Turbo Fan engine, and they operate under severe working conditions, such as misalignment, high speed, and heavy load. Surface text…
View article: A method to predict the radial runout of outer ring in cylindrical roller bearings
A method to predict the radial runout of outer ring in cylindrical roller bearings Open
For the rotary motion of a rolling bearing implemented by bearing components under geometric constraints, the rotational accuracy of assembled bearing should also be the result of interaction among geometric errors of bearing components. T…
View article: Transient Analysis of Air/Oil Two-Phase Flow in Bearing Chamber under the Periodic Boundary Conditions
Transient Analysis of Air/Oil Two-Phase Flow in Bearing Chamber under the Periodic Boundary Conditions Open
\nThe air/oil two-phase flow is extremely complex in the aero-engine bearing chamber, so the comprehensive understanding of the flow phenomenon is helpful to improve the design of the lubrication and heat exchange system. In this paper, tr…
View article: Prediction Method for the Radial Runout of Inner Ring in Cylindrical Roller Bearings
Prediction Method for the Radial Runout of Inner Ring in Cylindrical Roller Bearings Open
The motion error of assembled bearing depends on the geometric profile of bearing components. Therefore, it is crucial to establish the relationship between geometric error of bearing components and motion error of assembled bearing, which…
View article: Research on Rotational Accuracy of Cylindrical Roller Bearings
Research on Rotational Accuracy of Cylindrical Roller Bearings Open
To investigate transferring mechanism of form error of bearing elements and rotational accuracy in cylindrical roller bearings, according to the bearing components motion and geometric relationships, a prediction model for rotational accur…
View article: Dynamic performance of a C/C composite finger seal in a tilting mode
Dynamic performance of a C/C composite finger seal in a tilting mode Open
The complex operating state of aeroengines has an impact on the performance of finger seals. However, little work has been focused on the issue and the dynamic performance of finger seals is also rarely studied. Therefore, a distributed ma…
View article: Impact of lubricant traction coefficient on cage’s dynamic characteristics in high-speed angular contact ball bearing
Impact of lubricant traction coefficient on cage’s dynamic characteristics in high-speed angular contact ball bearing Open
In this paper, the formulas of elasto-hydrodynamic traction coefficients of three Chinese aviation lubricating oils, 4109, 4106 and 4050, were obtained by a great number of elasto-hydrodynamic traction tests. The nonlinear dynamics differe…
View article: Theoretical and experimental studies on dynamics of double-helical gear system supported by journal bearings
Theoretical and experimental studies on dynamics of double-helical gear system supported by journal bearings Open
The dynamic behaviour of a double-helical gear system supported by journal bearings is theoretically and experimentally investigated in this study. A bending–torsional–axial coupling model for dynamic analysis of double-helical gear system…
View article: Effect of Assembly Condition on Dynamic Performance of C/C Composite Finger Seal
Effect of Assembly Condition on Dynamic Performance of C/C Composite Finger Seal Open
The performance of finger seal as an important component has decisive influence on performance of aeroengine.The complicated operating state of aeroengine, such as assembly condition, also has important influence on finger seal performance…
View article: Ligament and Droplet Generation by Oil Film on a Rotating Disk
Ligament and Droplet Generation by Oil Film on a Rotating Disk Open
The lubrication and heat transfer designs of bearing chamber depend on an understanding of oil/air two-phase flow. As initial and boundary conditions, the characteristics of ligament and droplet generation by oil film on rotating parts hav…