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Numerical simulation of wind flow around an elastic inflated membrane

Viktor Šajn ; Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, SLOVENIA
Franc Kosel ; Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, SLOVENIA
Boris Štok ; Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, SLOVENIA

Sažetak

The aim of this paper is to present a simulation of a turbulent wind flow around an elastic inflated cylindrical membrane. The aeroelastic model consists of a flexible, large-displacement membrane and the Reynolds-averaged Navier-Stokes equation of a stationary flow with the k-ε turbulence model. The wind flow around the membrane was simulated as a two-dimensional turbulent flow around a deformable curve fixed at the ends. For simulating the problem, the Finite Element Method (FEM) was used. In the iterative calculation process, the shape of the fluid mesh is adapted to the shape of the solid. This adaptation is made so that in the calculation process of the solid the fluid mesh is taken as a weak, quasi solid. The simulations were performed for wind velocities of 10, 15, and 17.5 m/s, and the Reynolds numbers in terms of membrane diameters 6.7·106, 10·106, and 1.8·106 with an inflating pressure of 100 Pa. The results of the simulation show that the membrane is stable and has an acceptable shape when the ratio between the dynamic pressure of the wind and the inner pressure rp is less than 1 and it collapses when this ratio exceeds 2.

Ključne riječi

membranes, aeroelacticity, fluid-solid interaction, k-ε model of turbulence

Hrčak ID:

316175

URI

https://hrcak.srce.hr/316175

Datum izdavanja:

22.12.2003.

Posjeta: 23 *