Numerical Simulation of 3D Flow Field and Flow-Induced Noise Characteristics in a T-Shaped Reducing Tee Junction  

作　　者：Feiran Lv Min Wang Chuntian Zhe Chang Guo Ming Gao 

机构地区：[1]Shandong Engineering Laboratory for High-Efficiency Energy Conservation and Energy Storage Technology&Equipment,School of Energy and Power Engineering,Shandong University,Jinan,250061,China [2]Jinan Motor Vehicle Pollution Control Center,Jinan,250099,China [3]School of Energy and Power Engineering,Qilu University of Technology,Jinan,250306,China

出　　处：《Fluid Dynamics & Materials Processing》2023年第6期1463-1478,共16页流体力学与材料加工（英文）

基　　金：supported by the Shandong Engineering Laboratory for High-Efficiency Energy Conservation and Energy Storage Technology&Equipment.

摘　　要：The so-called T-shaped reducing tees are typically used to divide,change and control(to a certain extent)the flow direction in pipe networks.In this study,the Ffowcs Williams–Hawkings(FW-H)equation and the Large Eddy Simulation(LES)methods are used to simulate the flow-induced noise related to T-shaped reducing tees under different inlet flow velocities and for different pipe diameter ratios.The results show that the maximum flow velocity,average flow velocity,and vorticity in the branch pipe increase gradually as the related diameter decreases.Strong vorticity and secondary flows are also observed in the branch pipe,and the associated violent pressure fluctuations are found to be the main sources of flow-induced noise.In particular,as the pipe diameter ratio decreases from 1 to 0.45,the Total Sound Pressure Level(TSPL)increases by 6.8,6.26,and 7.43 dB for values of the inlet flow velocity of 1,2,and 3 m/s,respectively.The distribution characteristics of the flow-induced noise in the frequency domain follow similar trends for different pipe diameter ratios.

关 键 词：Flow field flow-induced noise FW-H equation large-eddy simulation 

分 类 号：O35[理学—流体力学]