Reliable Rotor Dynamic Design of High-Pressure Compressors Based on Test Rig Data1

Wagner, Norbert G.

doi:10.1115/1.1373396

Cited by 9 publications

(2 citation statements)

References 3 publications

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“…To reduce the overall forces that initiate resonance, it is important to minimize rotational unbalance and unnecessary external forces [1]. This paper highlighted on reliable rotor dynamic design as a whole, ranging from systematic R&D efforts to high-demand testing [2]. The literature shows several examples of high sub synchronous vibrations that made necessary changes to the machine [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Reliability based Maintenance Model to Assess the Condition of Rotor using XLrotor

Murgayya¹,

Suresh²,

Madhusudhan³

et al. 2019

Int J Performability Eng

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The work carried out is focused on study and behavior of rotors and to check the reliability at the design stage using the advanced XLrotor tool. For the selected rotor, the failures are controlled by shifting critical speeds above the maximum speed in which it is designed for. The rotor is balanced with safe limits of vibration severity criteria as per ISO standards for an optimized model. Sensitivity analysis is carried out on the rotor model by varying factors such as the diameter of shaft, disk configuration, disk offset, and load on rotor model. The results obtained show good agreement with the FEM results. The results obtained are undamped & damped critical speeds, as well as velocity & dynamic load on bearings due to imbalance using XLrotor. The rotor model is balanced for a steel shaft with a steel disk as well as a steel shaft with an aluminum disk (optimized rotor model) as part of the corrective method. The work clearly emphasizes XLrotor for designing a highly reliable rotor that is safe for operating conditions.

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Section: Introductionmentioning

confidence: 99%

Reliability based Maintenance Model to Assess the Condition of Rotor using XLrotor

Murgayya¹,

Suresh²,

Madhusudhan³

et al. 2019

Int J Performability Eng

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“…2-4 Song 5 presented a new model to predict the flow response in an axial turbine stage with a shrouded rotor. Wagner 6 developed a test rig supplied with N 2 for high pressures up to 25 MPa. The force that arose in the LS was considerably smaller than that of the honeycomb seal, and therefore better able to be kept under control.…”

Section: Introductionmentioning

confidence: 99%

Research on the leakage and dynamic characteristics of a new kind of radial annular seal and comparisons with labyrinth seals

Zhang

Yang

Tian

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part A:

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To minimize fluid leakage and improve rotordynamic stability of traditional seals, a new kind of radial annular seal is presented in this article. The structure and the sealing principle are analyzed. Compared to the traditional labyrinth seal, the fluid leakage direction is altered from the axial to radial direction. The flow resistance is increased, and the flowinduced force is reduced greatly. There is also a tremendous improvement in the wear resistance of the seal. Threedimensional numerical models of the traditional labyrinth seal and radial annular seal are set up. Calculated results show that the discharge coefficient of the radial annular seal is about 20% lower than that of the labyrinth seal. Though the rotating speed has a small influence on the radial seal force for both the radial annular seal and labyrinth seal, it has a large effect on the tangential seal force. The tangential seal force increases with the increasing speed, and the destabilizing force in the radial annular seal is reduced greatly when compared to that in the labyrinth seal. The radial seal force of the radial annular seal is about 1.5-2.5 times as strong as that of the labyrinth seal. The tangential seal force is about 30-50% lower than that of the labyrinth seal under the same eccentricity, and this ratio becomes larger and larger with the increasing speed. Finally, the dependency of the seal characteristics on the design parameters is studied. It is shown that the optimum ratios of the clearance s to the tooth thickness b (s/b) for the outward and inward flows are 4.5-5.5 and 11-13, respectively. The flow characteristics perform best with the ratio of the seal chamber width B to the tooth height H (B/H) on the same order of 5.5-7 for the two kinds of flows.

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Development and Validation of a Bulk-Flow Model for Staggered Labyrinth Seals

Cangioli

Vannini²,

Pennacchi

et al. 2018

Mechanisms and Machine Science

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Reliable Rotor Dynamic Design of High-Pressure Compressors Based on Test Rig Data1

Cited by 9 publications

References 3 publications

Reliability based Maintenance Model to Assess the Condition of Rotor using XLrotor

Reliability based Maintenance Model to Assess the Condition of Rotor using XLrotor

Research on the leakage and dynamic characteristics of a new kind of radial annular seal and comparisons with labyrinth seals

Development and Validation of a Bulk-Flow Model for Staggered Labyrinth Seals

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