关键词: 流体力学, U形惯性分离器, CFD, 气固两相流, 砂尘试验

Abstract: Sand/dust test is one of the key projects to examine the environmental adaptability of weapon and equipment. In order to decrease the abrasion of test facility caused by the sand/dust particles, the high efficacious callback of particles contained in the airflow is needed. A mathematical model of U-figure inertia separator is established, the flow field and the trajectories of particles in the separator are obtained by using a numerical simulation method, and the separation efficiency and pressure drop of separator with different rows of separate components are obtained at various flow velocities. The simulation results indicate that the efficiency of U-figure inertia separator is affected by the flow velocity evidently, and a reasonably designed separator can meet the requirement of the separation efficiency in a particular situation. All the results provide reference for the design and test of sand/dust separate systems.

Key words: hydromechanics, U-figure inertia separator, CFD, gas/solid two-phase flow, sand/dust test