Features of Structure and Flow Field in Homemade Co-Current Cavitation Water Jet Nozzle

Area of Science:

• Engineering
• Fluid Dynamics
• Materials Science

Background:

• Cavitation water jet technology offers a sustainable approach to cleaning and coating removal.
• Nozzle design is critical for optimizing cavitation performance in atmospheric conditions.
• Existing methods require improvements for enhanced efficacy.

Purpose of the Study:

• To design and evaluate a novel dual-nozzle co-current cavitation water jet nozzle.
• To investigate the influence of inlet pressure on flow field characteristics and cavitation.
• To analyze the dynamic behavior of cavitation clouds for improved cleaning applications.

Main Methods:

• Utilized shear flow cavitation, organ pipe resonance, and jet pump principles for nozzle design.
• Employed Computational Fluid Dynamics (CFD) with ANSYS Fluent for simulation.
• Applied pseudo-color imaging techniques to analyze cavitation cloud dynamics.

Main Results:

• The designed nozzle achieved a maximum vapor volume percentage exceeding 95% across various inlet pressures.
• Analysis revealed distinct stages of cavitation: inception, development, shedding, and collapse.
• The dynamic change period of the cavitation cloud was determined to be 1.5 ms.

Conclusions:

• The developed co-current cavitation water jet nozzle demonstrates effective cavitation generation.
• The findings support the potential of this design for efficient and sustainable cleaning and coating removal.
• Further research can optimize nozzle geometry for specific industrial applications.