Influence of Stator-rotor Movement on Inner Hole Cavitation of Rotary Cavitator

In order to study the influence of the stator-rotor movement on the inner hole cavitation of the rotary cavitator, the parameters were determined as stator-rotor clearance δ and rotor rotational speed n through model simplification. By establishing the geometric modeling, the gap δ and rotor inner hole fluid domain model was completed, and the mesh independence verification was carried out, and the inner hole transient cavitation model was given. The transient changes of gas contour under different gap δ were simulated by using gas volume fraction as the cavitation characterization standard, and the influence of gap δ on inner hole cavitation was obtained: the smaller the gap δ , the larger the gas volume fraction, and the 10 mm gap was better than 15 mm and 20 mm. The influence of rotational speed n on gas volume fraction was obtained by numerical simulation: the larger the speed n, the larger the gas volume fraction, and the 3 000 r/min was better than 2 500 r/min and 2 000 r/min. In the experiment, according to the frequency conversion speed regulation, the influence of speed n on the conductivity of pure aqueous solution was obtained: the speed n increased, the conductivity of the pure aqueous solution increased, and 9 000 r/min was better than 3 000 r/min. The reference for the optimization of structural parameters and practical application of inner hole rotary cavitator are provided.