首页|The impact of actively injecting bubbles on propeller performance
The impact of actively injecting bubbles on propeller performance
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NETL
NSTL
Elsevier
With the widespread application of bubble lubrication technology in transport ships, the interaction between propellers and bubble flow has received increasing attention. Based on the Reynolds averaged equation and volume fraction equation, combined with slip mesh technology, a numerical calculation model for propellers in water air mixed fluids was established. On the basis of verifying the numerical calculation method of semi immersed propeller, uncertainty analysis is conducted on the flow characteristics of KP505 propeller, and the influence of ventilation position and ventilation volume on the open water performance of the propeller is explored. Further establish linear and nonlinear relationship models between ventilation rate and KP505 propeller propulsion performance, and construct an unstable surface model to describe the impact of ventilation position moving towards the blade tip on open water performance and ventilation rate. Research has shown that the ventilation position largely determines the gas transport effects of propeller tip vortices and hub vortices. As the ventilation rate increases, the tip vortices gradually evolve into vortex rings in the far field; When the ventilation position moves towards the blade tip, the wing tip vortex becomes the main path for bubble transport, which significantly affects the propulsion performance.
Air injection bubbleGas liquid two phasePropeller performanceNon-uniformNumerical analysisNUMERICAL-ANALYSISWAKECAVITATIONSIMULATIONEVOLUTIONPRESSURE
NETL
NSTL
Elsevier
