Complex pressure pulsation phenomenon in fuel rails is generated by rapid opening and closing of injectors and it commonly causes undesirable noise. In the previous study, fluid-structure interaction analyses based on FEM had been conducted to examine...
Complex pressure pulsation phenomenon in fuel rails is generated by rapid opening and closing of injectors and it commonly causes undesirable noise. In the previous study, fluid-structure interaction analyses based on FEM had been conducted to examine the pulsation damping characteristics for different shapes of fuel rails. The results showed that the fuel rail with a high aspect ratio rectangular cross section seems to be best in order to reduce the pressure pulsations as shown in the previous experimental test by Mizuno, K. et al. In this study, CFD analyses (the fuel rail is regarded as a rigid structure.) have been performed to compare with the fluid-structure interaction analyses. And also the modal analyses for the fuel rails are performed to examine the correlation between the structural behavior and pressure pulsation.