TITLE:
Liquid Jet Blasting Using Ultra-High Frequency Supersonic Pulsed Air Jet
AUTHORS:
John T. Solomon
KEYWORDS:
Ultrasonic Actuators, Flow Control, Liquid Blasting
JOURNAL NAME:
Journal of Flow Control, Measurement & Visualization,
Vol.10 No.2,
April
11,
2022
ABSTRACT: This paper reports an experimental study on a liquid injector assembly integrated with an ultra-high frequency pulsed air jet that operates at 21 kHz. The active air-blasting assembly steadily injects a liquid through four micro-nozzles of 0.4 mm diameters each, positioned around a 1 mm nozzle through which the pulsed actuation jet flows out at supersonic velocity. High-frequency compressible air vortexes and shock waves generated by the injector atomize the liquid stream into finer droplets and distribute them to a larger area to improve mixing with the ambiance. The paper presents the design details and preliminary studies on the flow field characteristics of this novel injection scheme, which is a potential candidate for high-speed flow mixing and control applications.