Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump
The effect of a nonuniform radial/axial tip clearance on the flow field in a mixed-flow pump was studied by numerical simulation of the unsteady flow in the pump with two tip clearance shapes using the standard Reynolds average Navier–Stokes turbulence model, and the equations were solved with the S...
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| Дата: | 2018 |
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| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | English |
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Інститут проблем міцності ім. Г.С. Писаренко НАН України
2018
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| Назва видання: | Проблемы прочности |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/173824 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump / W. Li, L.L. Ji, W.D. Shi, Y.F. Ping, L. Zhou, X.P. Jiang // Проблемы прочности. — 2018. — № 1. — С. 151-160. — Бібліогр.: 18 назв. — англ. |
Репозитарії
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irk-123456789-1738242020-12-22T01:26:12Z Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump Li, W. Ji, L.L. Shi, W.D. Ping, Y.F. Zhou, L. Jiang, X.P. Научно-технический раздел The effect of a nonuniform radial/axial tip clearance on the flow field in a mixed-flow pump was studied by numerical simulation of the unsteady flow in the pump with two tip clearance shapes using the standard Reynolds average Navier–Stokes turbulence model, and the equations were solved with the SIMPLEC computational algorithm. The external characteristics, distribution of static pressure, streamline flow of the tip clearance, and vorticity in the impeller are analyzed. The accuracy of numerical simulation was assessed by comparing experimental data with computational results. Although a nonuniform tip clearance leads to a decline in the pump head, which is more pronounced under part-load conditions, the configuration with a nonuniform tip clearance (c = 0.5–1 mm) provides the more uniform velocity and pressure distribution both in the circumferential and axial directions, as the leakage vortex intensity is weakened and its shedding is suppressed. The research results pointed the way for improving the unsteady flow in the mixed-flow pump. Изучено влияние неравномерного зазора на поле течения в радиально-осевом насосе с помощью численного моделирования нестационарного течения в насосе с зазором двух конфигураций на основе стандартной модели турбулентности RNG k , выполнено решение уравнений с применением алгоритма SIMPLE. Проанализированы внешние характеристики, распределение статического давления, потока в зазоре и турбулентности в импеллере. Проведена оценка достоверности численного моделирования путем сравнения экспериментальных данных с результатами расчетов. Показано, что неравномерный зазор вызывает уменьшение напора в насосе, что становится более выраженным в условиях частичного нагружения, но конфигурация с неравномерным зазором (с = 0,5 1,0 мм) обеспечивает более равномерные скорость и распределение давления в касательном и осевом направлениях, поскольку интенсивность обтекания с кольцевым вихрем уменьшается, а его сброс замедляется. Полученные результаты открывают путь к стабилизации нестационарного потока в радиально-осевом насосе. 2018 Article Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump / W. Li, L.L. Ji, W.D. Shi, Y.F. Ping, L. Zhou, X.P. Jiang // Проблемы прочности. — 2018. — № 1. — С. 151-160. — Бібліогр.: 18 назв. — англ. 0556-171X http://dspace.nbuv.gov.ua/handle/123456789/173824 539.4 en Проблемы прочности Інститут проблем міцності ім. Г.С. Писаренко НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Научно-технический раздел Научно-технический раздел |
| spellingShingle |
Научно-технический раздел Научно-технический раздел Li, W. Ji, L.L. Shi, W.D. Ping, Y.F. Zhou, L. Jiang, X.P. Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump Проблемы прочности |
| description |
The effect of a nonuniform radial/axial tip clearance on the flow field in a mixed-flow pump was studied by numerical simulation of the unsteady flow in the pump with two tip clearance shapes using the standard Reynolds average Navier–Stokes turbulence model, and the equations were solved with the SIMPLEC computational algorithm. The external characteristics, distribution of static pressure, streamline flow of the tip clearance, and vorticity in the impeller are analyzed. The accuracy of numerical simulation was assessed by comparing experimental data with computational results. Although a nonuniform tip clearance leads to a decline in the pump head, which is more pronounced under part-load conditions, the configuration with a nonuniform tip clearance (c = 0.5–1 mm) provides the more uniform velocity and pressure distribution both in the circumferential and axial directions, as the leakage vortex intensity is weakened and its shedding is suppressed. The research results pointed the way for improving the unsteady flow in the mixed-flow pump. |
| format |
Article |
| author |
Li, W. Ji, L.L. Shi, W.D. Ping, Y.F. Zhou, L. Jiang, X.P. |
| author_facet |
Li, W. Ji, L.L. Shi, W.D. Ping, Y.F. Zhou, L. Jiang, X.P. |
| author_sort |
Li, W. |
| title |
Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump |
| title_short |
Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump |
| title_full |
Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump |
| title_fullStr |
Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump |
| title_full_unstemmed |
Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump |
| title_sort |
effect of a nonuniform radial/axial tip clearance on the flow field in a mixed-flow pump |
| publisher |
Інститут проблем міцності ім. Г.С. Писаренко НАН України |
| publishDate |
2018 |
| topic_facet |
Научно-технический раздел |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/173824 |
| citation_txt |
Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump / W. Li, L.L. Ji, W.D. Shi, Y.F. Ping, L. Zhou, X.P. Jiang // Проблемы прочности. — 2018. — № 1. — С. 151-160. — Бібліогр.: 18 назв. — англ. |
| series |
Проблемы прочности |
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2023-10-18T22:34:59Z |
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