Numerical Study of Two-Phase Flow for Fault Diagnosis in a Tail-Pipe Nozzle

In order to provide analysis results for fault diagnosis in a tailpipe nozzle to make some suggestions,twophase flow field is studied for a tailpipe nozzle by using the trajectory model and finite volume method to obtain the gas temperature and Mach number distributions,and to simulate the collision between the wall and different size particles under different total pressures.The calculation results show that there exists a point on the pipe inner wall where large size particles collide with wall intensively,giving rise to the tailpipe fault as a main cause,higher total pressure makes more collisions between particles and wall while larger size particles provoke makes more collisions.Accordingly some suggestions are prompted to enhance the reliability of heatresistant construction for a tailpipe nozzle.