A study on buffeting force test and correlation based on active grid turbulence field

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (8) : 123-130.

XIANG Dan1，ZHU Lishan2，NIU Huawei1

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Abstract

In order to study the correlation of buffeting forces on a bluff body, a rectangular cylinder was taken as an example.In the pulsating flow field of active grids, a pressure measurement method was applied to study the span-wise buffeting force under turbulent flow, combined with different correlation model fitting methods.The spatial correlation of buffeting force was compared with static and moving states to analyze the influence of the self-excited force on the correlation of the buffeting force, by decomposing the two forces with matlab.Two different force measurement methods (synchronous pressure measurement) were compared by a balance force test.The results show that the span-wise correlation of buffeting force decreases with the frequency and span spacing.Under the influence of aerodynamic self-excited force, the correlation was improved and larger than that of turbulence.

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integral length scale of wind fluctuations / buffeting force / span-wise correlation / self-excited force

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XIANG Dan1，ZHU Lishan2，NIU Huawei1. A study on buffeting force test and correlation based on active grid turbulence field[J]. Journal of Vibration and Shock, 2020, 39(8): 123-130

References

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