NUMERICAL SIMULATION OF UNSTEADY FLOW FIELD IN PULSE CLEANING SYSTEM OF CERAMIC FILTER

On the basis of experimental results of instantaneous velocity, the flow in the entraining region of unsteady flow field in the pulse cleaning system of a ceramic filter is regarded as two dimensional, unsteady, compressible and axisymmetrical flow. The computation analysis shows that the interaction process between the pulsed jet and entrained gas can be observed. In the initial stage, there exist the secondary entrained phenomena because of lower jet pulsing velocity. The mass flowrate of entrained gas increased gradually, while increasing the jet pulsing velocity. The computed and measured transient velocities are in good agreement. The simulation result is useful to performance analysis and optimum design of pulse backing cleaning system.