The effects of the lower outlet on the flow field of small gas–liquid cylindrical cyclone

Abstract

In this study, the effects of the lower outlet on the flow field of small gas–liquid cylindrical cyclones are investigated using Reynold stress turbulence model. Under the same operating conditions, four configurations with different outlet styles and angles are established. The time-averaged tangential velocity, axial velocity, and root mean square velocity are compared, respectively. It is shown that many local secondary flow patterns are present in small gas–liquid cylindrical cyclones, and those flow patterns may cause serious energy losses. The lower outlet mainly influences the gas–liquid cylindrical cyclones flow field in the central region. The small gas–liquid cylindrical cyclones with single rectangular outlet provides a steady flow field and a large backflow zone, which are helpful in improving the separation efficiency. According to the simulations, a single rectangular lower outlet is the optimal one for small gas–liquid cylindrical cyclones.

Performance Prediction Model of Dynamic Pressure Oil-Air Separator

“…The simulation results were consistent with the experimental results. On this basis, Zhu et al [15] studied the outlet forms at the bottom of the separator by using RSM and discussed the influence of different outlet forms on the flow field distribution. They believed that the single tangential outlet is more conducive to improving the separation efficiency.…”

Numerical Study on the Influence of Length-Diameter Ratio on the Performance of Dynamic Pressure Oil-Air Separator

“…Wang et al [17] also used RSM to simulate the cyclone field in the separator and obtained the pressure drop and velocity distribution rules of the flow field in the separator, and the simulation results were basically consistent with the experimental results. On this basis, Zhu et al [18] studied the outlet forms at the bottom of the separator by using RSM, discussed the influence of different outlet forms on the flow field distribution, and believed that the single tangential outlet is more conducive to improving the separation efficiency. Ghasemi et al [19] conducted a numerical simulation of the separator using the Eulerian model, discussed the influence of structural factors such as inlet width, inlet angle, inlet height, cylinder diameter, and outlet pipe diameter on the separation efficiency, and proposed a structural optimization scheme.…”