A novel method for optimization of slit Venturi dimensions through CFD simulation and RSM design

Area of Science:

• Fluid Dynamics
• Mechanical Engineering

Background:

• Cavitating Venturi devices are crucial in various industrial applications.
• Optimizing Venturi geometry is essential for controlling cavitation intensity and performance.
• Existing design methods may lack comprehensiveness for specific applications.

Purpose of the Study:

• To present a novel, comprehensive seven-step method for optimizing cavitating Venturi design.
• To determine optimal geometrical and operational parameters for a given cavitation number.
• To provide a design framework applicable to diverse engineering needs.

Main Methods:

• Utilized computational fluid dynamics (CFD) for discharge coefficient calculation.
• Employed Response Surface Methodology (RSM) combined with CFD for parameter optimization.
• Validated the proposed design method through laboratory experiments.

Main Results:

• Optimized geometrical parameters (inlet pressure, throat area, width, length, height, divergence angle) for a cavitation number of 0.2.
• Calculated key hydraulic parameters including discharge coefficient, flow rate, throat velocity, cavitation volume, and length.
• Demonstrated the effectiveness of the proposed optimization method.

Conclusions:

• The developed seven-step method offers a robust approach to designing cavitating Venturis for desired cavitation intensity.
• The integration of CFD and RSM provides an efficient tool for Venturi parameter optimization.
• Experimental validation confirms the reliability and applicability of the proposed design strategy.