摘要: An industrial valve used in plane Environmental Control systems (ECS) is investiged numerically to determine its passive (effect of the component on the propagation of the acoustic-field) and active (sound generation) acoustic beh... 展开 An industrial valve used in plane Environmental Control systems (ECS) is investiged numerically to determine its passive (effect of the component on the propagation of the acoustic-field) and active (sound generation) acoustic behavior. The valve is first simulated using RANS computations to obtain the correct operating condition corresponding to experiments. The mean flow field is then used in two acoustic solvers (Discontinuous-Galerkin solving Linearized-Euler Equations in time domain and high-order finite element solver in frequency domain) to determine the passive part of the component with and without including flow effects. The unsteady sources are obtained with an unsteady Scale Adaptive Simulation and used in the second acoustic solver to determine the active part. Comparisons are made with experiments and a satisfactory agreement is found for both passive and active parts of the valve. 收起