Fluid-structure Interaction Analysis In Reciprocating Compressor Piston And Cylinder Labyrinth Seals

Labyrinth seal is a kind of untouched dynamic seal which has advantages as nolubrication, simple mechanism，job stabilization, convenient use. It is commonly usedin the engine, turbo-expander, compressors and other mechanical structures.Labyrinth seal reduce the leakage by increasing the amount of local kinetic energyloss of fluid flow and improve the sealing performance. So, how to reduce thelabyrinth leakage effectively is important.The staggered labyrinth seal used in the labyrinth piston compressor is modeledin this paper. CFD fluid-structure interaction analysis method is used to perfect thetheory of labyrinth seals and offer basis for the design of labyrinths and labyrinthpiston compressors localization. Specific studies are as follows.Firstly, the labyrinth seal structure geometry and numerical model are established.Use CFD software ANSYS Workbench as simulation platform to simulate the processof labyrinth seal by fluid-structure interaction analysis method.Secondly, do numerical simulation of the sealing process with the influence ofinternal structure size of labyrinth seal performance as the main parameters, thecharacteristics of fluid flow in different structure be obtained. Study the changes ofleakage characteristics in different sealing structure sizes. Therefore, this study resultprovides reference for later numerical study on labyrinth seal mechanism.Thirdly, compare the leakage of fluid-structure interaction simulation and theinternal flow field simulation with the experience formula calculation results. Theresult reveals the influence of FSI for labyrinth seal performance. Aims to prove thevalidity of the labyrinth seal FSI analysis method.