Abrasive Blasting Nozzle Noise Control

An abrasive blasting nozzle is a complex aero-acoustic noise source, characterized by super-sonic, two-phase flow. Noise from an abrasive blasting nozzle is comprised of three sources: (i) turbulent mixing noise (ii) shock-associated noise and (iii) jet impingement noise. It is not uncommon for abrasive nozzles to generate noise levels greater than 120 dB(A); far exceeding typical occupational noise limits. The work proposed herein will apply sophisticated aero-acoustics principals to the design of an abrasive blasting nozzle; reducing noise from the nozzle while simultaneously improving the devices productivity. The nozzle developed through this effort will provide industry with a device that represents an evolutionary step forward in safety and efficiency.