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Comparative assessment of regenerative potential of 0.8% hyaluronic acid gel combined with deproteinized bovine bone mineral in the management of furcation defects: A randomized controlled clinical study.

J Indian Soc Periodontol
Elanchezhiyan S, Priya AN, Kumar PKS, Santhosh S, Maruthamuthu N, Murali S.   +5 more
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Effects of Reynolds number and tooth front angle on leakage loss and heat transfer characteristics in a rotating labyrinth seal

Journal of Thermal Science and Engineering Apllications, 2023
The labyrinth seal is effective in reducing leakage losses at the rotor blade top in the turbine. This study investigates the variation in labyrinth seal performance at different speeds, different Reynolds numbers and different tooth front angles ...
Shaoyun Yang, Wei Du, L. Luo, Songtao Wang   +3 more
semanticscholar   +1 more source

Rotordynamic characteristics of a novel labyrinth seal with partition walls and helical groove teeth

Proceedings of the Institution of mechanical engineers. Part A, journal of power and energy, 2023
To improve the stability of the conventional labyrinth seal (LS), in this paper, four novel fully partitioned helically labyrinth seals (FPHGLS) were designed and they were in comparison with one FPPGLS.
Wensong Xue, Z. Fang, Tianhao Wang, Zhigang Li, Jun Li   +4 more
semanticscholar   +1 more source

Rotordynamic Characteristics of a Novel Labyrinth Seal with Swirl Brakes At Seal Entrance and Cavity

Journal of Engineering For Gas Turbines and Power, 2022
In this article, to improve the rotordynamic performance of the labyrinth seal, a novel labyrinth seal (Design 3), which possesses inlet swirl brakes at the seal entrance and swirl-reversal brakes in the fourth cavity, was designed.
Wensong Xue, Z. Fang, Zhigang Li, Jun Li
semanticscholar   +1 more source

A Stepped Shaft Labyrinth Seal Vs. a Pocket Damper Seal: Leakage and Dynamic Force Coefficients Under Wet Gas Operation

Journal of Engineering For Gas Turbines and Power, 2022
Modern turbomachinery favors pocket damper seals (PDS) which produce more effective damping than labyrinth seals (LS). Liquid tolerant compressors enable deep sea oil and gas (O&G) facilities; and seals supplied with a two-phase flow, can have an ...
Jose M. Torres, L. San Andrés, Jing Yang   +2 more
semanticscholar   +1 more source

Theoretical Leakage Equations Towards Liquid-Phase Flow in the Straight-Through Labyrinth Seal

Journal of tribology, 2021
Labyrinth seals are widely applied in turbomachinery for gas and liquid sealing. A series of labyrinth seal leakage equations so far have been proposed for compressible gas and few equations for incompressible liquid.
Han Lingsheng, Yongqing Wang, Kuo Liu, Ban Ziyou, Qin Bo, Haibo Liu, M. Dai   +6 more
semanticscholar   +1 more source

Leakage and rotordynamic performance of a semi-Y labyrinth seal structure for centrifugal pump based on multi-frequency whirl method

Journal of Engineering For Gas Turbines and Power
A semi-Y labyrinth seal (SYLS) is proposed to reduce leakage and enhance the stability of centrifugal pump. The calculation adopts a multi-frequency circular whirling model with two-control user-defined functions (UDFs) and the numerical predictions ...
Wenjie Zhou, Huihao Su, Hui Liu, Yang Zhang, Ning Qiu, Bo Gao   +5 more
semanticscholar   +1 more source

System Level Analysis of Compressor Eye-Labyrinth Seal Rotordynamic Forces: A Computational Fluid Dynamics Approach

Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, 2021
Accurate characterization of compressor rotordynamic coefficients during the design phase reduces the risk of sub-synchronous vibration (SSV) problems occurring in the field.
Shujan Ali, Farzam Mortazavi, A. Palazzolo   +2 more
semanticscholar   +1 more source

Inlet Preswirl Effects on the Leakage and Dynamic Characteristics of a Labyrinth Seal: Experimental Results and Computational Fluid Dynamics Analysis

Journal of Engineering For Gas Turbines and Power
In this paper, a rotordynamic test rig based on the mechanical impedance method has been developed to measure the leakage and dynamic coefficients of annular gas seals.
Tianhao Wang, Wensong Xue, Zihan Zhang, Zhigang Li, Jun Li   +4 more
semanticscholar   +1 more source

Rotordynamic Characteristics of the Straight-Through Labyrinth Seal Based On the Applicability Analysis of Leakage Models Using Bulk-Flow Method

Journal of Engineering For Gas Turbines and Power, 2021
The fluid excitation induced by the labyrinth seal would deteriorate the stability of turbomachinery shaft. Developing an accurate and rapid prediction approach is crucial for the analysis of the fluid excitation rotordynamics of the labyrinth seal ...
Tianhao Wang, Zhigang Li, Jun Li
semanticscholar   +1 more source