Predicted and measured plate velocities induced by turbulent boundary layers

Sound transmission through double cylindrical shells lined with porous material under turbulent boundary layer excitation

“…The boundary conditions in the axial direction x at both ends were assumed to be simply supported [23,26,29,30] and can be expressed by…”

“…The quantities α and β will be defined based on Corcos [44] and Efimtsov [45] model which are frequently used in the literature. Φ p ðωÞ is the autospectrum of the wall pressure, which is given by [23] Φ p ðωÞU 1 q 2 δ n ¼ 2:14 Â 10 À 5 ; ωδ n =U 1 r0:25…”

“…The effect of the boundary layer thickness is considered in the Efimtsov model. It is suitable for a wide range of Mach number in the range 0.41-2.1 [23]. Besides the two models mentioned above, several other models have been proposed (as reviewed by Miller [46], Graham [47] and Hwang [48]).…”

“…Many researchers in the past have paid attention to the noise radiated by a single plate [17][18][19][20][21][22][23][24][25]. However, these studies are still quite far away from real industrial problems.…”

A preliminary study of the pressure and shear stress on a plane surface beneath a circular cylinder in turbulent flow fields

“…However, there appears to be a need to understand the fluctuating forces on the plane surface caused by the unstable flow generated by the flow-cylinder interaction, as fluctuating pressure and shear stress on a surface are important sources of surface vibration and sound radiation in structural acoustics (Liu et al, 2012). This paper focuses studying the fluctuating forces on the surface of a rigid plane below a cylinder.…”