Influence of structure parameters on aeroelastic stability for labyrinth seal based on energy method

Wang, Nengmao; Wang, Yanrong; Tian, Anmin

doi:10.1016/j.jppr.2018.11.002

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…With the development of computer technology and fluid mechanics, people use theoretical analysis, numerical analysis and experimental research to study the non-contact labyrinth sealing technology. Wang Nengmao et al [4], predicted the stability of a straight-through labyrinth seals by solving aerodynamic work and damping. The results showed that the change of structural parameters would affect the stability of the labyrinth seal to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Non-contact Labyrinth Seal under Negative Pressure Intervention

Wu,

Sun,

et al. 2024

J. Phys.: Conf. Ser.

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The non-contact labyrinth seal structure of a high-speed gearbox was taken as the research object, a non-contact labyrinth seal structure under negative pressure intervention was designed, and its rationality was verified by simulation analysis. An airfoil-shaped acquisition device for collecting negative pressure was designed, and its rationality was analyzed by simulation. According to the design, a test platform for non-contact labyrinth seal under negative pressure intervention was built to measure the pressure data of each sealing chamber of the non-contact labyrinth seal under different working conditions. The results showed that it was effective to balance the internal and external pressure of the non-contact labyrinth seal by using the negative pressure collected by the airfoil-shaped device in the complex flow field of the high-speed gearbox. It also showed that the non-contact labyrinth seal structure under negative pressure intervention designed in this paper is an effective way to solve the leakage problem of the non-contact labyrinth seal used in high-speed gearbox.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Non-contact Labyrinth Seal under Negative Pressure Intervention

Wu,

Sun,

et al. 2024

J. Phys.: Conf. Ser.

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“…Yan et al [5] conducted a study on the leakage characteristics of the labyrinth seal, examining the impact of the bending angle of the seal teeth and the mushroom radius on the seal's performance. From the viewpoint of energy dissipation, Haghiabi et al [6] and Wang et al [7] studied the energy variation of the fluid medium before and after flowing through the labyrinth weir. Through the above literature, we can see that when the sealing medium flows through the seal chamber and the seal clearance, its kinetic energy will be converted at the throttling clearance and dissipated in the expansion cavity, so the leakage can be reduced.…”

Section: Introductionmentioning

confidence: 99%

Influence of Structural Parameters of Gearbox Seal System of Electrical Multiple Units on Seal Performance

Shen,

Zhu,

Shao

et al. 2024

Mathematical Problems in Engineering

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The gearbox seal system is a critical component of the electrical multiple units drive system, with a direct impact on the safety and reliability of train operations. This study intends to analyze how structural parameters of the gearbox seal system influence the seal performance from the viewpoint of “oil–air separation and scavenge oil” by using a discrete phase model and volume of fluid. The results show that the oil–air separation performance is mainly affected by the oil droplets’ inertia force and the airflow traction force, and the scavenge oil performance is decided by the oil–air separation performance of each seal chamber. The relationships between seal chamber size, axial seal clearance width, height difference, scavenge oil hole diameter, and seal performance are analyzed, and the study also found that optimizing the stator chamber depth–width ratio of the seal system studied in this paper at 2.5, reducing the rotor chamber depth–width ratio and axial seal clearance width, and increasing the relative height difference can improve the seal performance. And increasing the scavenge oil hole diameter also enhances the seal system’s performance. The simulation results can be used as design references for gearbox seal systems.

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“…Bendikson [18,19], Vahdati [20][21][22], Wang [23][24][25], and many other researchers have conducted a lot of research on the mechanism of blade aerodynamic damping. Sayma [26], Phibel [27], and Wang [28] analyzed the aerodynamic damping of the labyrinth and its parameter sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Damping of the Tubed Vortex Reducer in an Axial Compressor Disk Cavity

Fang¹,

Wang²,

Jiang³

et al. 2023

Aerospace

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The tubed vortex reducer in the axial compressor can destroy the vortex in the disk cavity, by a thin-walled tube, to reduce the total pressure loss. The tube may suffer from vibration problems, such as flutter and forced vibration, which are closely related to aerodynamic damping. In this paper, the energy method and the influence coefficient method are used to study the aerodynamic damping of the tube. Based on the modal characteristics, steady and unsteady flow characteristics of the tube, the first and second modes with lower frequencies and greater vibration risk are selected as the analysis objects. The energy method is used to calculate the aerodynamic damping of the tube with different amplitudes, which shows that the results approximately meet the linear assumption and are accurate. The results obtained by the influence coefficient method show that the aerodynamic influence between adjacent tubes is very small, and the effect of inter-tube phase angle on the aerodynamic damping can be ignored. Finally, it is found that the effect of structural coupling caused by the support ring on the aerodynamic damping of the tube is mainly reflected in two aspects: frequency reduction and tube mode coupling.

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Influence of structure parameters on aeroelastic stability for labyrinth seal based on energy method

Cited by 11 publications

References 15 publications

Experimental Study on Non-contact Labyrinth Seal under Negative Pressure Intervention

Experimental Study on Non-contact Labyrinth Seal under Negative Pressure Intervention

Influence of Structural Parameters of Gearbox Seal System of Electrical Multiple Units on Seal Performance

Aerodynamic Damping of the Tubed Vortex Reducer in an Axial Compressor Disk Cavity

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