A meshless method for subsonic stall flutter analysis of turbomachinery 3D blade cascade

• Autorzy: Prasad Chandra Shekhar , Šnábl Pavel , Pešek Luděk

Identyfikatory

DOI

10.24425/bpasts.2021.139000

• Języki publikacji: EN

Abstrakty

EN

The analysis of subsonic stall flutter in turbomachinery blade cascade is carried out using a medium-fidelity reduced-order aeroelastic numerical model. The model is a type of field mesh-free approach and based on a hybrid boundary element method. The medium-fidelity flow solver is developed on the principle of viscous-inviscid two-way weak-coupling approach. The hybrid flow solver is employed to model separated flow and stall flutter in the 3D blade cascade at subsonic speed. The aerodynamic damping coefficient w.r.t. inter blade phase angle in traveling-wave mode is estimated along with other parameters. The same stability parameter is used to analyze the cascade flutter resistance regime. The estimated results are validated against experimental measurements as well as Navier-Stokes based high fidelity CFD model. The simulated results show good agreement with experimental data. Furthermore, the hybrid flow solver has managed to bring down the computational cost significantly as compared to mesh-based CFD models. Therefore, all the prime objectives of the research have been successfully achieved.

Słowa kluczowe

EN

stall flutter; turbomachinery cascades; reduce-order-model; meshless method; viscous-inviscid coupling; boundary element method

PL

metoda bezsiatkowa; metoda elementów brzegowych

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2021
• Tom: Vol. 69, nr 6
• Strony: art. no. e139000
• Opis fizyczny: Bibliogr. 28 poz., il., fot. tab.

Twórcy

autor

Prasad Chandra Shekhar

• Institute of Thermomechanics of the CAS, Prague, Czech Republic

autor

Šnábl Pavel

• Institute of Thermomechanics of the CAS, Prague, Czech Republic

autor

Pešek Luděk

• Institute of Thermomechanics of the CAS, Prague, Czech Republic

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).