Experimental Investigation And Numerical Simulation Of The Gas Flow Field In The Cylindrical Three-phase Cyclone With A Vaned Inlet And A Direct-current Outlet

For the optimization of the structure parameters and operation ones of the cylindrical three-phase cyclone with a vaned inlet and a direct-current outlet which is used for separating the mixtures of solid and liquid particles from gas flow, gas fluid field in three-phase cyclone was measured by five-hole pressure probe under two fluxes. Under maximal flux (Vi = 4.3 m/s),fluid field of 16 cross sections in the model were investigated, the tangential velocity empirical equation of each partition was got, and empirical equations of axial and radial velocity on the ring partition between baffle bar and cylinder wall were obtained. Expression of liquid drop centrifugal sedimentation velocity is reasoned,by which liquid drop critical diameter that can be separated was calculated as 200(m. After analysis,it is in the rotational flow within the diameter of exhaust pipe that energy loss is occurred,and the length of exhaust pipe is not very important to the quantity of energy loss.Simplifying the problem to 2D swirling flow, simulate it with the RNG k-( Model and the Reynolds Stress Model (RSM) in Fluent, and with experimental data as input boundary conditions. It is found that the result of RSM is better in consistent with experimental data than RNG k-( Model, and it is acceptable to study the flow field with this method. According to the huge difference in radial velocity is between simulation results and experimental ones, considering the theory of probe measurement, the recourses of measuring error, flow contuity, etc, the inaccuracy of radial velocity measurement was proved.