Numerical investigation of the air injection effect on the cavitating flow in Francis hydro turbine Научная публикация
| Журнал |
Thermophysics and Aeromechanics
ISSN: 0869-8643 , E-ISSN: 1531-8699 |
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| Вых. Данные | Год: 2017, Том: 24, Номер: 5, Страницы: 691-703 Страниц : 13 DOI: 10.1134/S0869864317050055 | ||||||
| Ключевые слова | air injection; cavitation; hydro turbines; numerical modeling; self-excited oscillations | ||||||
| Авторы |
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| Организации |
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Реферат:
At full and over load operating points, some Francis turbines experience strong self-excited pressure and power
oscillations. These oscillations are occuring due to the hydrodynamic instability of the cavitating fluid flow. In many
cases, the amplitude of such pulsations may be reduced substantially during the turbine operation by the air injection/
admission below the runner. Such an effect is investigated numerically in the present work. To this end, the hybrid
one-three-dimensional model of the flow of the mixture “liquid−vapor” in the duct of a hydroelectric power station,
which was proposed previously by the present authors, is augmented by the second gaseous component the noncondensable
air. The boundary conditions and the numerical method for solving the equations of the model are described.
To check the accuracy of computing the interface “liquid−gas”, the numerical method was applied at first for
solving the dam break problem. The algorithm was then used for modeling the flow in a hydraulic turbine with air
injection below the runner. It is shown that with increasing flow rate of the injected air, the amplitude of pressure pulsations
decreases. The mechanism of the flow structure alteration in the draft tube cone has been elucidated, which
leads to flow stabilization at air injection.
Библиографическая ссылка:
Chirkov D.V.
, Shcherbakov P.K.
, Cherny S.G.
, Skorospelov V.A.
, Turuk P.A.
Numerical investigation of the air injection effect on the cavitating flow in Francis hydro turbine
Thermophysics and Aeromechanics. 2017. V.24. N5. P.691-703. DOI: 10.1134/S0869864317050055 WOS Scopus OpenAlex
Numerical investigation of the air injection effect on the cavitating flow in Francis hydro turbine
Thermophysics and Aeromechanics. 2017. V.24. N5. P.691-703. DOI: 10.1134/S0869864317050055 WOS Scopus OpenAlex
Оригинальная:
Чирков Д.В.
, Щербаков П.К.
, Черный С.Г.
, Скороспелов В.А.
, Турук П.А.
Численное исследование влияния вдува воздуха на кавитационное течение в радиально-осевой гидротурбине
Теплофизика и аэромеханика. 2017. Т.24. №5. С.711-723.
Численное исследование влияния вдува воздуха на кавитационное течение в радиально-осевой гидротурбине
Теплофизика и аэромеханика. 2017. Т.24. №5. С.711-723.
Идентификаторы БД:
| Web of science: | WOS:000418306000005 |
| Scopus: | 2-s2.0-85038882716 |
| OpenAlex: | W2775909038 |