旋转空化器功耗特性数值模拟OA

To investigate the coupling mechanism between internal flow fields and energy dissipation in rotary cavitation devices,CFD(computational fluid dynamics)was employed based on the standard k-s turbulence model to numerically simulate their power consumption characteristics,with model reliability validated through experimental measurements.A three-dimensional model was constructed using second-order discretization schemes to improve computational accuracy.The single-phase flow characteristics(including velocity gradients,shear rates,turbulent kinetic energy distribution,and dissipation rates)in the rotor-stator gap and blind hole regions were systematically analyzed.Dimensionless parameters(power number Po,Reynolds number Re,and flow number NQv)were used to establish a power consumption prediction model.The results show that high-shear zones are concentrated at the gap and blind hole edges,serving as the primary sources of energy dissipation.Second-order schemes demonstrate superior performance in fitting accuracy and convergence compared to first-order discretization.In the laminar regime,Po exhibits an inverse proportionality to Re,while in the turbulent regime,Po stabilizes at a constant value.A linear relationship between Po and NQv is established.This study reveals the coupling mechanism between internal flow and energy dissipation in rotary cavitation devices and provides a critical foundation for subsequent structural optimization and industrial applications.