دورية أكاديمية
Research on the Unsteady Flow and Vortex Characteristics of Cavitation at the Tongue in Centrifugal Pump
| العنوان: | Research on the Unsteady Flow and Vortex Characteristics of Cavitation at the Tongue in Centrifugal Pump |
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| المؤلفون: | Z. Y. Luo, Y. Feng, X. Y. Sun, Y. Gong, J. X. Lu, X. W. Zhang |
| المصدر: | Journal of Applied Fluid Mechanics, Vol 17, Iss 3, Pp 646-657 (2024) |
| بيانات النشر: | Isfahan University of Technology, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Mechanical engineering and machinery |
| مصطلحات موضوعية: | centrifugal pump, tongue cavitation, vortex, vorticity transport equation, stability, Mechanical engineering and machinery, TJ1-1570 |
| الوصف: | In order to study the unsteady flow and vortex characteristics of tongue cavitation, numerical calculation is carried out for the whole flow channel given different conditions. Then, the calculation results are verified experimentally. The results show that after the occurrence of tongue cavitation in the centrifugal pump, it deteriorates with the decrease of NPSHa. However, when NPSHa is reduced to 3.78 m, it does not change significantly anymore with the decrease of NPSHa. The extrusion of fluid by the vapor at the tongue promotes the formation of the separation vortex, and the re-jet flow caused by the separation vortex leads to vapor shedding. The frequency of cavitation shedding is consistent with the frequency of vortex shedding. In the vorticity transport equation, the relative vortex stretching term and the relative vortex dilatation term dominate the vapor shedding by controlling the change in vorticity. The baroclinic torque term mainly affects the change of vorticity at the vapor-liquid interface, but to a much lesser extent than the first two terms. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1735-3572 1735-3645 |
| العلاقة: | https://www.jafmonline.net/article_2371_2a9c58f278bccdb76e12640df8fc5088.pdfTest; https://doaj.org/toc/1735-3572Test; https://doaj.org/toc/1735-3645Test |
| DOI: | 10.47176/jafm.17.3.2181 |
| الوصول الحر: | https://doaj.org/article/dca7c809979b464fbafbc1f39c315a64Test |
| رقم الانضمام: | edsdoj.7c809979b464fbafbc1f39c315a64 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 17353572 17353645 |
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| DOI: | 10.47176/jafm.17.3.2181 |