Experimental study of the air-jet stem generator

Résumé

Applications of sound and ultrasound air-jet stem generators became of great interest in heat and power engineering, in environmental protection, in the production of heat insulating material, extraction of poor uranium ore, in metallurgical production, in food industry for stabilization and clarification in beer production, in the agriculture sector for laying and fodder, for water disinfection, in medical treatments and in other fields[1]. Thus the aim of this paper was the assessment of construction, calculation method and acoustic parameters of air-jet stem generator. We determined the generator’s acoustic parameters considering different distances between nozzle and resonator, but also by placing a disk perpendicular to the nozzle and inserting the generator into a cylindrical tube. We studied the influence of the resonator distance (ΔR=0.7, 1.2 and 1.7 mm) and the pressure on acoustical field parameters (frequency and intensity level) produced by the air-jet stem generator. The results established the optimal parameters for the air jet stem generator in order to get maximal acoustical intensity.