Experimental study of the flow characteristics of a cellular well seal for steam turbines
Keywords:
seal, steam turbines, flow characteristics, gap, stator, rotorAbstract
In this paper, a study of the flow characteristics of a seal with a cellular stator is carried out. The rotor had a well surface with a diameter of d = 10 mm and a depth of h = 1 mm. The stator part is made of stamped rings and radial plates, forming a cellular structure with a rectangular cross section. Holes were made on the outer plate to separate moisture into the sealing chamber behind the stator. A series of experiments were carried out with a fixed disk and rotating at different speeds (1000; 2000; 3000 rpm). The results of the construction of consumption characteristics showed that the effect of rotation is negligible. Numerical research at Ansys revealed the complex spatial nature of the gas flow in the flow part of the seal with the formation of reverse vortex flows. In a seal with wells, the vortices in the cells, on the contrary, have a more gentle structure. The strengthening of vortex structures is associated with a changing gradient of the area of the wells, where local acceleration of the main flow occurs, which, in turn, pumps the perturbed flow into the cells. The numerical calculation and field experiment performed have shown the effectiveness of using this seal design for steam turbines, especially in nodes of large axial displacements of the shaft line relative to the housing.
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1. Дмитриев С.С., Петрунин Б.Н., Ахмед М.Э.А.Э. Экспериментальные исследо-вания расходных характеристик разношаговых многогребенчатых уплотнений // Теп-лоэнергетика. – 2021. – № 4. – С. 47-54. EDN: BHZYDQ. DOI: 10.1134/S0040363621030024
2. Зарянкин А.Е. Механика несжимаемых и сжимаемых жидкостей. – М.: Изд. дом МЭИ, 2022. – 590 с.
3. Паровые и газовые турбины для электростанций / А.Г. Костюк, В.В. Фролов, А.Е. Булкин, А.Д.Трухний; под ред. А.Г. Костюка. – М.: Изд. дом МЭИ, 2016. – 557 с.
4. Дмитриев С.С., Петрунин Б.Н., Ахмед М.Э.А.Э. Экспериментальные исследо-вания влияния вращения ротора и закрутки потока перед уплотнениями на расход утечки // Теплоэнергетика. – 2021. – № 2. – С. 16-27. EDN: ZTLRIO. DOI: 10.1134/S0040363621010124.
5. Исследование сепарационной способности нового периферийного уплотнения НИУ МЭИ / В.Г. Грибин, С.С. Дмитриев, Б.Н. Петрунин, М.Э.А.Э. Ахмед // Тепло-энергетика. – 2020. - №6. – С. 21-27. EDN: EYSVEW. DOI: 10.1134/S004036362006003X
6. Афанасьев И.В., Грановский А.В., Манаев И.А. Исследование влияния кон-струкции корпуса на потери в безбандажных турбинных лопатках // Теплоэнергетика. – 2022. – № 8. – С. 21-30. EDN: MXDABS. DOI: 10.56304/S0040363622070013
7.Результаты исследования регулирующего клапана с обратным подводом пара / В.Г. Грибин, О.М. Митрохова, А.В. Шерстнева, П.М. Нестеров // Теплоэнергетика. – 2023. – № 6. – С. 56-66. EDN HADTIN. DOI: 10.56304/S004036362306005X
APA
1. Dmitriev, S. S., Petrunin, B. N., & Mohamed, E. A. E. A. (2021). Experimental studies of the discharge characteristics of variable-pitch multifinned seals. Thermal Engineering, 68(4) , 295-301. https://doi.org/10.1134/S0040601521030022
2. Zaryankin, A. E. (2022). Mexanika neszhimaemy`x i szhimaemy`x zhidkostej [Mechanics of incompressible and compressible fluids] . Izd. dom MEI. [In Russian]
3. Kostyuk, A. G., Frolov, V. V., Bulkin, A. E., & Truxnij, A.D. (2016) Parovy`e i gazovy`e tur-biny` dlya e`lektrostancij [Steam and gas turbines for power plants] (Ed. A.G. Kostyuk). Izd. dom MEI. [In Russian]
4. Dmitriev, S. S., Petrunin, B. N., & Mohamed, E. A. E. A. (2021). Experimental studies into the effect that the rotor rotation and flow swirling upstream of seals have on the leakage flowrate. Thermal Engineering, 68(2) , 94-104. https://doi.org/10.1134/S0040601521010122
5. Gribin, V. G., Dmitriev, S. S., Petrunin, B. N., & Ahmed Mohamed, E.A.E. Study into the separa-tion ability of the new nru mpei peripheral sealing. Thermal Engineering, 67(6) , 343-348. https://doi.org/10.1134/S0040601520060038
6. Afanasyev, I. V., Granovsky, A. V., & Manaev I. A. (2022). Studying the casing design influ-ence on the losses in unshrouded turbine blades. Thermal Engineering, 69, 569-577. https://doi.org/10.1134/S0040601522070011
7. Gribin, V. G., Mitrokhova, O. M., Sherstneva, A. V., & Nesterov, P. M. (2023). Results from the study of a control valve with reverse steam supply. Thermal Engineering, 70, 443-452. https://doi.org/10.1134/S0040601523060058
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