Abstract
In this paper, a kind of exhaust treatment device for drilling diesel engine with simple structure, low resistance, high filtration efficiency, wide collecting particle size range and low energy consumption was designed. Using RNG $$k - \varepsilon$$ turbulence model, the gas-phase flow field of the tail gas treatment unit and the gas-phase flow field of the conventional cyclone separator without corona pole were numerically calculated, and the three-dimensional velocity distribution law of the flow field in the tail gas treatment unit was studied. Compared with the conventional cyclone separator, the results show that the tangential velocity disturbance of the inner flow field is more obvious, the mean tangential velocity decreases, and the velocity in the outer vortex area decreases by 20%. Meanwhile, due to the influence of corona electrode, the eddy current flow in the treatment device is more disordered. The inner axial velocity of the processing device is slower in the down-flow area and larger in the up-flow area. Relatively speaking, the radial velocity magnitude is small, and the distribution is non-axisymmetric.
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