Improvement of air extracting characteristics for annular water-air self-excited oscillation jet

The flow field of the annular water-air self-excited oscillation jet was physically described with the realizable κ-Ε turbulent model and the Euler multiphase model, and numerically simulated with the Fluent code of the software package ANSYS13.0 for the purposes of increasing the low energy transfer efficiency and reducing the high residuary pressure. The impacts of the major factors involved, including the pressure, velocity, temperature, and geometry of the annular jet, on the gas entrainment capacity were analyzed by the orthogonal simulation. The simulated results show that the structure and geometry of the annular water-air self-excited oscillation jet significantly affect the gas entrainment capacity. After structural optimization of the key parts, the gas entrainment capacity of the newly-developed jet was found to be stronger than that of the conventional annul ar water-air jet.