Study on Separation Characteristics of Dust and Droplet on Air Intake Pre-filtration Systems of CV Based on CFD Simulation and Test

Abstract

In order to the problem of short life of air filter in intake system due to the harsh working conditions of commercial vehicles(CV), the computational fluid dynamics (CFD) method was used to simulate the velocity flow field of the three high inlet pipe assemblies, and the velocity cloud of different vortex fan angle were obtained. These velocity cloud diagram proves that the velocity gradient is caused by the angle of the vortex fan, and the velocity gradient can coarsely separate the dust, droplet and gas. The rack experiment method was adopted for the three high inlet pipe assemblies to evaluate its the pre-filter performance. The test results show that the vortex fan at the front end of the tube plays a good role in the pre-filtration of dusts and droplets. And the pre-filtration efficiency reaches over 87%. Effectively extend the life of the air filter element.