Non-Axisymmetric Flows and Rotordynamic Forces in an Eccentric Shrouded Centrifugal Compressor—Part 1: Measurement
| Autor: | Bong-Jun Cha, Tae Wook Lee, Suyong Kim, Jieun Song, Joo Sung Hong, Seung Jin Song, Dong Hun Lim, Tae Choon Park |
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| Rok vydání: | 2019 |
| Předmět: |
020209 energy
Mechanical Engineering Instrumentation Centrifugal compressor Rotational symmetry Energy Engineering and Power Technology Aerospace Engineering Stiffness 02 engineering and technology Mechanics law.invention Fuel Technology Pressure measurement Nuclear Energy and Engineering law 0202 electrical engineering electronic engineering information engineering medicine Eccentric medicine.symptom Gas compressor Geology |
| Zdroj: | Journal of Engineering for Gas Turbines and Power. 141 |
| ISSN: | 1528-8919 0742-4795 |
| DOI: | 10.1115/1.4044874 |
| Popis: | Centrifugal compressors can suffer from rotordynamic instability. While individual components (e.g., seals, shrouds) have been previously investigated, an integrated experimental or analytical study at the compressor system level is scarce. For the first time, non-axisymmetric pressure distributions in a statically eccentric shrouded centrifugal compressor with eye-labyrinth seals have been measured for various eccentricities. From the pressure measurements, direct and cross-coupled stiffness coefficients have been determined. Thus, the contributions of the pressure perturbations in the shroud cavity and labyrinth seals have been simultaneously investigated. The cross-coupled stiffness coefficients in the shroud and labyrinth seals are both positive and one order of magnitude larger than the direct stiffness coefficients. Furthermore, in the tested compressor, contrary to the common assumption, the cross-coupled stiffness in the shroud is 2.5 times larger than that in the labyrinth seals. Thus, not only eye-labyrinth seals but also shrouds need to be considered in rotordynamic analysis. |
| Databáze: | OpenAIRE |
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