Analysis methods of determining velocity distribution waves in the cavitation zone ultrasound field

Abstract

The main parameters of cavitation processing technology environments is the speed of sound in a cavitation medium pressure, the duration, size: cavitation region, bubbles and core. The most successful use of ultrasound associated with handling liquid media, because in them the phenomenon of ultrasonic cavitation, which is an effective mechanism for concentration of energy of sound waves in the low-density high energy density, which is caused by pulsations and cavitation bubbles popping. An important component in ensuring an effective process of cavitation treatment process fluids is to calculate the ultrasonic technological devices that hold for precavitational mode with the following specification obtained by previous studies. However, reliable results associated with the methods of measuring the velocity of ultrasonic waves in a developed cavitation because it is a part of almost all the defining parameters of ultrasonic cavitation processing technology environments. Measuring the velocity of ultrasonic waves carried pulse, optical, amplitude-phase methods. Pulse methods have a wider dynamic range, measurement accuracy independent of the distance between the transmitter and the object opportunity emitter distance from the subject a considerable distance. Amplitude-phase methods require extended frequency band transceiver emitting element and amplifier path that reduces security and selectivity. Frequency and phase methods have the narrow bandwidth receiving radiating path that provides good value energy radiated and received signals, high noise immunity. Is an effective method for determining the rate for power characteristics, the essence of which is to determine the energy flux density and energy density relative to the ultrasound field. It has been found that the accuracy of measuring the speed of sound depends on whether it should receive the absolute value or relative value can restrict the speed of sound when changing any external parameters. Absolute measurement accuracy is about 10-5, while the relative change as accuracy is much higher, it reaches the order of 10-7. The choice of measurement due to the conditions of the experiment. The essential difference in the numerical values of the speed, complicates the acceptance of an opinion on the actual numerical value of speed and requires more informed research in determining the accepted assumptions and preconditions in the formulation and conduct research.