Academic Journal
Relationship between Casing Pressure and Non-Synchronous Vibration in an Axial Compressor
| العنوان: | Relationship between Casing Pressure and Non-Synchronous Vibration in an Axial Compressor |
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| المؤلفون: | Valerie Hernley, Aleksandar Jemcov, Jeongseek Kang, Matthew Montgomery, Scott C. Morris |
| المصدر: | International Journal of Turbomachinery, Propulsion and Power, Vol 9, Iss 2, p 14 (2024) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2024 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | compressor, non-synchronous vibration, convective NSV, rotating instabilities, pre-stall disturbances, Mechanical engineering and machinery, TJ1-1570 |
| الوصف: | The relationship between aerodynamic forcing and non-synchronous vibration (NSV) in axial compressors remains difficult to ascertain from experimental measurements. In this work, the relationship between casing pressure and blade vibration was investigated using experimental observations from a 1.5-stage axial compressor under off-design conditions. The wavenumber-dependent auto-spectral density (ASD) of casing pressure was introduced to aid in understanding the characteristics of pressure fluctuations that lead to the aeromechanical response. Specifically, the rotor blade’s natural frequencies and nodal diameters could be directly compared with the pressure spectra. This analysis indicated that the rotating disturbances coincided with the first bending (1B) and second bending (2B) vibration modes at certain frequencies and wavenumbers. The non-intrusive stress measurement system (NSMS) data showed elevated vibration amplitudes for the coincident nodal diameters. The amplitude of the wavenumber-dependent pressure spectra was projected onto the single-degree-of-freedom (SDOF) transfer function and was compared with the measured vibration amplitude. The results showed a near-linear relationship between the pressure and vibration data. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2504-186X |
| Relation: | https://www.mdpi.com/2504-186X/9/2/14; https://doaj.org/toc/2504-186X; https://doaj.org/article/e6b02e9a140e47fc97cf5954327f2472 |
| DOI: | 10.3390/ijtpp9020014 |
| الاتاحة: | https://doi.org/10.3390/ijtpp9020014 https://doaj.org/article/e6b02e9a140e47fc97cf5954327f2472 |
| رقم الانضمام: | edsbas.9B1B3FFA |
| قاعدة البيانات: | BASE |
| تدمد: | 2504186X |
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| DOI: | 10.3390/ijtpp9020014 |