Numerical simulation of part load resonance: comparison of 1D 3D and 1D models

Numerical simulation of part load resonance: comparison of 1D 3D and 1D models Full article

Journal

IOP Conference Series: Earth and Environmental Science
ISSN: 1755-1307

Output data

Year: 2025,

Authors

Chirkov Denis ¹ , Ustimenko Аlexander ² , Skorospelov Vladimir ³ , Turuk Polina ³

Affiliations

1	Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2	JSC Power Machines, Saint Petersburg, Russia
3	Sobolev Institute of Mathematics SB RAS, Novosibirsk, Russia

Funding (1)

Russian Science Foundation

25-21-00195

Partial load resonance, caused by rotation of the draft tube vortex, is investigated using a 1D hydro-acoustic model and a coupled 1D-3D CFD model. Within the 1D model the influence of the draft tube wave speed, the excitation frequency, and the cavity compliance on the amplification factor is investigated. A range of cavity compliance values, corresponding to resonance, is determined. The same operating point was computed using the 1D-3D model for different Thoma numbers. The value of identified cavity compliance, corresponding to the maximum pressure pulsations amplitude is approximately the same as in the 1D model. However, the amplification factor in the 1D-3D model is much lower, than that found in 1D. Two approaches for identification of cavity compliance from CFD simulations are discussed.

Chirkov D. , Ustimenko А. , Skorospelov V. , Turuk P.
Numerical simulation of part load resonance: comparison of 1D 3D and 1D models
IOP Conference Series: Earth and Environmental Science. 2025.

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