دورية أكاديمية
Transient dynamic stress behavior analysis of the axial flow pump as turbine at part loads.
| العنوان: | Transient dynamic stress behavior analysis of the axial flow pump as turbine at part loads. |
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| المؤلفون: | Yang, Fan, Xu, Guiying, Guo, Jun, Li, Zhongbin, Luan, Yi, Tang, Fangping |
| المصدر: | Alexandria Engineering Journal; Jul2024, Vol. 99, p180-195, 16p |
| مصطلحات موضوعية: | AXIAL flow, STRAINS & stresses (Mechanics), PUMP turbines, TURBINE pumps, BEHAVIORAL assessment, IMPELLERS |
| مستخلص: | To explore the structural dynamic characteristics of the impeller and shaft system of the axial flow pump as turbine, the variation law of impeller transient equivalent stress, deformation, and the impeller and shaft system mode are analyzed by the transient fluid-structure interaction method. Findings indicate that the equivalent stress is centralized at the blade root around the hub and tends to decrease as it moves towards the shroud. The maximum equivalent stress at 1.0 Q bep and 1.1 Q bep is 1.26 times and 2.0 times higher than that at 0.8 Q bep. Blade deformation is significantly influenced by flow rate. The maximum deformation of the blade at 1.0 Q bep and 1.1 Q bep is 1.6 times and 3.6 times higher than that at 0.8 Q bep. The impeller and shaft system with prestress in dry mode has an average natural frequency of the first 10 orders that is 16.7 Hz higher than without prestress. However, with the fluid adding mass and flow damping, the average natural frequency of the first 10 orders of the impeller and shaft system in wet mode is reduced by 278.08 Hz compared with dry mode. In fact, the impeller and shaft system of the axial flow pump as turbine is not prone to vibration. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: | Supplemental Index |
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