Three-dimensional simulation of full load instability in Francis turbines | Sciact - Система учета научной деятельности ИМ СО РАН

Three-dimensional simulation of full load instability in Francis turbines Научная публикация

Журнал

Journal of Hydraulic Research
ISSN: 0022-1686 , E-ISSN: 1814-2079

Вых. Данные

Год: 2019, Том: 57, Номер: 5, Страницы: 623-634 Страниц : 12 DOI: 10.1080/00221686.2018.1494047

Ключевые слова

Cavitation; flow instabilities; Francis turbine; numerical simulation; three-dimensional models; water pipelines

Авторы

Chirkov Denis V. ^1,2 , Cherny Sergey G. ^1,2 , Shcherbakov Pavel K. ² , Skorospelov Vladimir A. ³ , Zakharov Alexander V. ⁴

Организации

1	Institute of Computational Technologies Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
2	Mechanics and Mathematics Department, Novosibirsk State University, Novosibirsk, Russian Federation
3	Sobolev Institute of Mathematics Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
4	OJSC “Power Machines” LMZ, St. Petersburg, Russian Federation

Full load instability is one of the most dangerous unsteady flow phenomena, and practically restricts the zone of stable operation of the whole hydraulic power plant. This paper presents a mathematical model and a numerical method for simulation of full load instability and the resulting pressure pulsations in Francis turbines. The model consists of one-dimensional hydro-acoustic equations for a long penstock domain, and three-dimensional Reynolds averaged Navier–Stokes equations of “liquid-vapour” flow for the turbine domain. Series of computations of a high head hydraulic power plant are carried out. Investigated are the sensitivities to time step and mesh size refinements as well as the effect of turbulence model. Thoma number and operating point dependencies of the computed amplitude and frequency of pressure pulsations are compared to measurements and to the predictions of the fully one-dimensional model of the power plant. The amplitude of the computed pressure and power oscillations agree well with the available experimental data, showing the potential of the presented approach to investigate and predict high load pulsations in hydraulic power plants. © 2018, © 2018 International Association for Hydro-Environment Engineering and Research.

Chirkov D.V. , Cherny S.G. , Shcherbakov P.K. , Skorospelov V.A. , Zakharov A.V.
Three-dimensional simulation of full load instability in Francis turbines
Journal of Hydraulic Research. 2019. V.57. N5. P.623-634. DOI: 10.1080/00221686.2018.1494047 WOS Scopus OpenAlex

Web of science:	WOS:000482979900002
Scopus:	2-s2.0-85052337205
OpenAlex:	W2888239136

БД	Цитирований
Scopus	12
OpenAlex	13
Web of science	10