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.
Benefit: A successful SBIR program will introduce a revolutionary new abrasive blasting nozzle to the market place. In terms of noise (safety) and performance, the technology developed has the opportunity to, over time, replace the use of conventional dry abrasive blasting nozzles.
Keywords: Nozzle, Nozzle, abrasive blasting, Noise control, Jet noise
