A Prediction Tool For Spatially Decaying Freestream Turbulence

Paper presented at 2018 Canadian Society of Mechanical Engineers International Congress, 27-30 May 2018.A set of new correlation equations characterizing the spatial decay of isotropic homogeneous turbulence has been formulated in the current study. The correlation equations are based on the results from the current numerical simulations combined with data from earlier relevant experimental studies [10], [15], [16]. The correlation equations can be effective for predicting the local values of turbulent properties (turbulence intensity (TI) and integral length scale (Lu)) from well specified initial conditions and, similarly, the magnitudes of inlet turbulence (TI and Lu) can be estimated from the local magnitudes of length scale and turbulent kinetic energy (TKE) using the same prediction methodology. The set of prediction tools should be useful in the design of wind tunnel experiments to characterize bluff body aerodynamics in response to different incident turbulence conditions