SI Hai-qing, WANG Tong-guang, ZONG Hui-Ying. Influence of the plate on the cavity flow-induced oscillations and the modification of the oscillation frequency equation[J]. 2006, 21(6).
SI Hai-qing, WANG Tong-guang, ZONG Hui-Ying. Influence of the plate on the cavity flow-induced oscillations and the modification of the oscillation frequency equation[J]. 2006, 21(6).DOI:
A numerical solution of the three-dimensional URANS equation was presented using the fully implicit unfactored methods
where the turbulent coefficient was calculated based on the revised B-L turbulence model
and numerical simulations were implemented for supersonic three-dimensional open cavities.The self-sustained oscillatory motion of the shear layer was studied for plates with different lengths.The plate in the cavity isolates the shear layer and the cavity
and therefore reduces the coupling between the cavity pressure fluctuations and the shear layer.The oscillation of the shear layer decreases with the increase of the plate length.Based on the different characteristic lengths
Heller’s frequency equation was modified.The frequencies predicted by the modified equation agree with those by the close-box acoustic model;several comparisons demonstrate the validity of the modified equation.