Self-excited vibration of a palisade in 2D subsonic, transonic and supersonic flow

• Autorzy: Rządkowski R. , Kovalyov A.
• Języki publikacji: EN

Abstrakty

EN

In recent years coupled fluid-structure problems have appeared. The computational method used to solve this problem was based on a time-marching algorithm, so it was natural to consider a time domain flutter analysis method. The time domain method of flutter analysis is based on the simultaneous integration in time of the equation of motion for the structure and the fluid. The flow model is capable of representing 2D flows over a wide Mach number range from low subsonic to supersonic, including transonic flows. The aerodynamic model fully accounts for blade thickness and camber and the angle-of-attack effects. The unsteady Euler equations are integrated by using the explicit monotonous second-order accurate Godunov scheme. The blade is modelled on the basis of extended beam theory including a bending-bending-torsional vibration and also by the simple two-degree of freedom model. The equation of motion is obtained by using the extended Hamilton's principle and the Ritz method. The direct integration method is used to find a solution of the coupled fluid-structure problem. In this work the comparison of numerical and experimental results is presented for the first and fourth standard configurations.

Słowa kluczowe

EN

blades; flutter; vibrations

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2000
• Tom: Vol. 4, No 1
• Strony: 49--80
• Opis fizyczny: Bibliogr. 22 poz., rys.

Twórcy

autor

Rządkowski R.

• Institute cf Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-952 Gdansk, Poland
• Polish Naval Academy, Faculty of Mechanical and Electrical Engineering, Gdynia, Poland

autor

Kovalyov A.

• Department of Hydromechanics of Power Machines, Institute for Problems in Machinery, Ukrainian National Academy of Sciences Pozarsky St. 2/10 Kharkov, 310046, Ukraine

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