Frequency‐flow speed dependence of structural response to turbulent boundary layer pressure excitation

1992 ◽  
Vol 91 (2) ◽  
pp. 907-910 ◽  
Author(s):  
M. L. Rumerman
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Structural Response ◽  
Flow Speed ◽  
Speed Dependence ◽  
Pressure Excitation

Resonant flow in small cavities submerged in a boundary layer

1988 ◽  
Vol 420 (1859) ◽  
pp. 219-245 ◽  
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Large Scale ◽  
Resonant Cavity ◽  
Cavity Flow ◽  
Flow Speed ◽  
Small Scale ◽  
S Waves ◽  
Grooved Surface ◽  
Tollmien Schlichting

The viscosity-dominated unsteady flow in a row of small transverse square cavities lying submerged in a turbulent boundary layer is first considered. Experiments performed primarily with one size of cavities show that the cavity flow can be excited by freestream disturbances in a narrow frequency band that is independent of the flow speed. The turbulent boundary layer in which the cavities are submerged remains transparent to the disturbances. The cavity flow resonates when the depths of the cavity and the Stokes layer are nearly the same, that is when 2π fk 2 / v = 1, where f is the frequency of the resonant cavity flow, k is the cavity height and v is the kinematic viscosity of the fluid. An associated laminar boundary-layer excitation experiment shows that the instability process over the grooved surface also involves the amplification of Tollmien–Schlichting (T–S) waves in much the same manner as in a smooth-wall Blasius profile but the grooves enhance receptivity. A theory is given proposing that the resonant groove flow in the low Reynolds number turbulent boundary layer is driven by highly amplified matched T–S waves. The possible relevance of the observed coupling between the large-scale freestream disturbances and the small-scale cavity flows to the turbulence production mechanism in a smooth flat-plate turbulent boundary layer is also discussed.

The random structural response due to a turbulent boundary layer excitation

2003 ◽  
Vol 6 (6) ◽  
pp. 437-450 ◽  
Author(s):  
S. De Rosa ◽  
F. Franco ◽  
G. Romano ◽  
F. Scaramuzzino
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Structural Response

Similitude laws for the structural response of flat plates under a turbulent boundary layer excitation

2019 ◽  
Vol 129 ◽  
pp. 590-613 ◽  
Author(s):  
Francesco Franco ◽  
Olivier Robin ◽  
Elena Ciappi ◽  
Sergio De Rosa ◽  
Alain Berry ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Structural Response ◽  
Flat Plates

Structural response of stiffened plates in similitude under a turbulent boundary layer excitation

2020 ◽  
Vol 98 ◽  
pp. 103119
Author(s):  
Francesco Franco ◽  
Alain Berry ◽  
Giuseppe Petrone ◽  
Sergio De Rosa ◽  
Elena Ciappi ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Structural Response ◽  
Stiffened Plates
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