Correlation Structures of Pressure Field and Integrated Forces on Oscillating Prism in Turbulent Flows

AbstractThis study sought to illuminate the turbulence-induced changes in the aerodynamic correlation structure on a stationary/oscillating rectangular prism. A forced-vibration system was used with a model instrumented with 66 pressure transducers. The study included the effects of the turbulence intensity, turbulence integral scale, and structural motion on the spanwise and streamwise correlation (or coherence) of integrated aerodynamic quantities (lift force or torsional moment) and pressures. These effects are discussed based on the stationary model tests, the oscillating model tests in the low to the high reduced velocity ranges, which are characterized as three different aerodynamic regimes. In general, the turbulence scale effects are more significant than those of the turbulence intensity. Larger turbulence scale usually leads to larger spanwise correlation of aerodynamic quantities on stationary models, but the results of the oscillating model tests in the low reduced velocity range indicate a re...

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