3-D Simulation of Rotary Atomized Nozzle Flow Characteristics at Low Pressure

In order to realize liquid (oil etc.) atomized and to improve the combustion efficiency, the atomization or adding moisture is required by atomized nozzle in the oil burner and some power driven thrusters. Based on physics model and some suitable hypothesizes, the 3-D mathematical models for rotary atomized nozzle with micro-expanded tangent channel at low pressure are presented, and the same time, the various simulation tests are taken with the k-ε/RNG models and SIMPLE method, the tests results shown: The angle (θ) of the micro-expanded tangent channel plays an important role for the fluid characteristics, if θ<0, the circumfluence at the exit of the nozzle is obviously, and θ>0, the solid cone in nozzle are formed easily, but its energy loss is bigger. While the initial pressure p₀ = 0.3Mpa, U_x,0 = 0, U_y,0 = 0, U_z,0 = −0.2m/s, the circumfluence at the exit of the nozzle isn’t exactly formed with θ = 5.8°, and the energy loss is reduced and the atomized angle can get 80°. The nozzle can be widely adequate to the medium atomized instrument about the oil burner and some power driven thrusters.