Study on the key parameters of ice particle air jet ejector structure

Area of Science:

• Materials Science and Engineering
• Surface Treatment Technologies
• Mechanical Engineering

Background:

• Existing ice particle jet technologies suffer from ice particle adhesion, hindering application efficiency.
• Ice particle storage and transport present challenges in engineering applications.
• The need for improved ice particle handling in surface treatment is critical.

Purpose of the Study:

• To propose and develop an ice particle air jet surface treatment technology for instant ice particle preparation and utilization.
• To design an integrated jet structure for efficient ice particle ejection and acceleration.
• To optimize ejector nozzle parameters for enhanced ice particle kinetic energy and surface treatment performance.

Main Methods:

• Development of an integrated jet pump-based structure for in-situ ice particle generation and acceleration.
• Systematic investigation of working nozzle position (Ld), expansion ratio (n), acceleration nozzle diameter ratio (Dn), and length-to-diameter ratio (Ln).
• Optimization of structural parameters using ice particle impact kinetic energy as the evaluation index.
• Verification through aluminum alloy plate depainting tests.

Main Results:

• Optimal ejector nozzle parameters (n=1.5, Dn=4.0, Ld=4, Ln=0 mm) were identified under 2 MPa air pressure.
• These parameters effectively ejected and accelerated ice particles, enhancing treatment efficiency.
• Surface treatment tests showed a larger paint removal radius and reduced surface roughness of aluminum alloy plates from 3.194±0.489 μm to 1.156±0.136 μm.

Conclusions:

• The developed ice particle air jet technology successfully addresses ice particle adhesion and storage issues.
• Instant preparation and utilization of ice particles offer a feasible and efficient solution for material surface treatment.
• The optimized design provides a promising technical method for advanced surface engineering applications.