Study of Cyclone-type Dust Removal Device for Gas Flow Sensor

To improve the environmental adaptability of hot-film gas flow sensors, a cyclone-type dust removal device is designed. By analyzing the gas flow field and dust dynamics characteristics, the DPM two-phase flow model and the RNG k-ε turbulence model are selected for simulation. The parameters of the cyclone structure are determined by orthogonal tests to make it have the highest dust removal efficiency. Then the effects of the dust diameter, dust concentration, and inlet flow rate on the dust removal efficiency are analyzed by simulation and experiment. It is demonstrated that cyclone-type dust removal device has a good removal efficiency of up to 80%, which meets the application requirements in some non-filtered situations and poor air quality environments to reduce the dust deposition on the surface of the sensor chip.