HYDRODYNAMIC GENERATOR OF ULTRASONIC ACOUSTIC VIBRATIONS AND METHOD OF ITS GENERATING Russian patent published in 2008 - IPC B06B1/18 

FIELD: physics; acoustics.

SUBSTANCE: invention relates to hydrodynamic techniques for acoustic vibrations generating in free-flowing mediums. The engineering result of the invention is the increasing of sound waves intensity up to 1,500 W/cm² at sound frequency 1.0 MHz and distance of ultrasonic waves energy transfer 2,000 m as well as decreasing of device cost. The device comprises the hollow housing with inlet and outlet holes and the obstacle for fluid flow positioned inside the housing. The housing is designed as cone-cylindrical tube, the obstacle represents the system consisting of tandem connected bluff body, stem and disc positioned in axial alignment with the tube The central cylindrical section of the tube has the cross sectional diameter more than cross sectional diameter of peripherical cylindrical sections The central and peripherical sections are connected with cone tube sections The distance from disk to fluid outlet hole is chosen from the range. L=1.2-2.0 D₁, where D₁ - disk diameter The ratio D₁/D₂ is chosen from the range 0,6-0,95, where D₂ - diameter of central cylindrical section

EFFECT: increasing of sound waves intensity; decreasing of acoustic vibrations generator cost.

3 cl, 1 dwg