A model of wall pressure correlation for prediction of turbulence-induced vibration

Determining correlation and coherence lengths in turbulent boundary layer flight data

“…These phase errors would have greatly reduced the measured coherence length between sensors. Similar estimates of long coherence lengths have been reported by at least one other recent study [15]. As mentioned above, the long coherence lengths are due primarily to the influence of coherent structure in the log region on the wall pressure.…”

“…Analysis of the data reveal a coherence length of 0.45 m at 1 kHz requiring parameters of 0.06, 15 and 3. Another recent study also reports a similar trend towards increased measured coherence lengths requiring modifications to model parameters [15]. The observed increased coherence lengths may be due to several factors including improved instrumentation, location of the array, the conditions under which the data were acquired and the processes used to reduce the data.…”

Analysis of the scaling laws for the turbulence driven panel responses

“…Nevertheless, in order to make the plate response independent of the input it seems convenient to consider the ratio S w /S p as done already in Finnveden et al (2005).…”

Prediction of the response of a thin structure subjected to a turbulent boundary-layer-induced random pressure field

“…Innovative and fast solutions for the stochastic response of a plate have been carried out by many researchers [15][16][17][18][19]. Birgersson et al [15] used spectral finite element and dynamic stiffness methods to analyze the autospectral density of the velocity of a plate due to a turbulent boundary layer.…”

“…They utilized an approach in which the cross spectral density of the response was determined by a single integration over all wavenumbers rather than double integrals over the surface. Finnveden et al [16] investigated the vibration response of a plate excited by a turbulent boundary layer experimentally and numerically. The vibration response of the velocity of a thin-walled plate was measured and then predicted using wall pressure models.…”