Pressure wave propagation characteristics in fluid-filled pipes with fluid-structure interaction

Considering Coriolis force,Centrifugal one and migration one,a 14-equation model of pipes with fluid-structure interaction was established.Angle conversion matrix between different pipes and the transfer matrix algorithms for a fluid pressure wave non-reflected boundary condition were established,and then the model and algorithms were validated with numerical examples.Furthermore,the influence laws and characteristics of fluid parameters,boundary condition and angle between two pipes on pressure wave transmission characteristics and dynamic response were analyzed and summarized in detail.It was shown that a standing-wave phenomenon occurs due to FSI,it is more obvious when fluid and pipe attribute are more similar;the effect of FSI on the pressure wave reaches the maximum when the fluid becomes an absolute rigid boundary;the pressure wave resonance peaks increase when the angle between different pipes appears as a result of Burdon coupling,and these peaks are more easily influenced by the angle.