Noise Radiation from Two Circular Cylinders in Tandem Arrangement Using High-Order Multidomain Spectral Difference Method

In order to develop a good understanding of noise sources generated by a landing gear, Large Eddy Simulations without a sub-grid scale model or coarse Direct Numerical Simulations of a turbulent flow over two circular cylinders in tandem arrangements have been carried out using a high-order multidomain unstructured spectral difference method. Two distinct nondimensional separation distances; L/D=3.7 and 1.435; are used in the simulations. The Mach number and Reynolds number used are M=0.1 and Re=2.0x103 based on the free stream condition and cylinder diameter for both cases. Some key features of the mean and fluctuating flow fields are obtained. The dominant shedding frequency in the wake of the tandem cylinders is in good agreement with experimental results. I