The article is devoted to designing of multi-frequency source of ultrasonic action with radiator in form of stair-step disc.

The article is devoted to the development of ultrasonic radiator in form of stair-step plate. The influence of radiator sizes on frequency and vibration amplitude is studied. On the base of the represented calculations it was determined the set of recommendations for designing of such radiators.

The article presents the results of studying of the process of aggregate formation at the ultrasonic coagulation of submi-cron particles. The results are obtained on the base of mathematical modeling of translatory motion and rotary motion of the couple of particles under the action of ultrasonic field. The novelty of proposed model is in the fact that specific feature of flow of small-scale particles (less than 1 μm) by continuous medium at the deflection of their form from spherical is taken into consideration. Obtained results let formulating requirements to the radiators of ultrasonic vibrations for realization of the coagulation process with maximum efficiency.

The article is devoted to the development of the equipment for contact-free energy action of high-intensity ultrasonic vibrations for practical treatment of biological tissues with simultaneous spraying of medicines. The model of the apparatus, which was able to provide necessary treatment of biological tissues, was developed. The results of measurements of distribution of ultrasonic vibration intensity of the disk radiator were obtained, disperse composition of the aerosol was determined.

In the article the construction of improved apparatus of opposite rotational flotations for collection of ready nanodispersed product is considered. The main feature of perfected construction is an introduction of two sources of ultrasonic vibrations into the apparatus, for which piezoelectric vibrating systems with the disk radiators are used. Carried out analysis of the apparatus of opposite rotational flotations by finite element method showed high efficiency of developed centrifugal apparatus providing collection of 90% of nanomaterial particles.

The article is devoted to the development of the agglomerator to increase the efficiency of separation of nanoscale dispersed particles. Designed agglomerator provides preliminary coagulation due to ultrasonic action, and it allows to enlarge particles in 8 times at the productivity of 1000 m 3 /hour, with the concentration of upto 200gr/m 3 , density of the material agglomerates is 200 kg/m 3 and initial size of the particles is 200 nm. It guarantees essential increase of the efficiency of the apparatus of centrifugal acoustic collection.

The article is devoted to the process of liquid spraying by the ultrasonic radiator in the form of disk. New functional possibilities of the ultrasonic disk radiators during liquid spraying were studied. The results of productivity and power inputs for spraying at the application of different systems of fluid supply were obtained.

In the article the results of the researches on efficiency definition of ultrasonic coagulation of ready nanodispersed product are presente. Developed measuring bench allowed to control changes of concentration of nanoparticles due to their agglomeration at the application of high-intensity ultrasonic vibrations.

Статья посвящена разработке оборудования и исследованию процесса пеногашения. Разработан аппарат с изгибно-колеблющимся излучателем и показано, что применение ультразвуковых колебаний высокой интенсивности позволяет ускорить процесс осаждения пен. На основании анализа результатов экспериментальных исследований процесса пеногашения рекомендованы оптимальные режимы и условия ультразвукового воздействия на пивную и мыльную пены.

The article is devoted to development and study of the defoaming process. The device with the radiator in the form of flexural vibrating disk was designed. It was shown that application of high-intensity ultrasonic vibrations allows accelerating the foam sedimentation process. The optimum modes and conditions of ultrasonic influence on brewer foam and lather are recommended based on the analysis of the results obtained from the experimental studies of the defoaming process.

The article is devoted to the method of low-temperature drying of materials in the food industry based on application of the compact drier consisting of the ultrasonic vibration system with the aluminum thickness stepped-variable disk radiator.

Разработка пьезоэлектрических ультразвуковых колебательных систем для интенсификации процессов в газовых средах УДК 534.14:534.122 В.Н. Хмелев, д-р техн. наук, проф., (3854) 43-25-81, vnh@bti.secna.ru, (Россия, Бийск, БТИ), С.Н. Цыганок, к-т техн. наук, доц., (3854) 43-25-70, grey@bti.secna.ru, А.В. Шалунов, к-т техн. наук, доц., (3854) 43-25-70, shalunov@bti.secna.ru, А.Н. Лебедев, инженер, (3854) 43-25-70, lan@bti.secna.ru, C.C. Хмелев, аспирант, (3854) 43-25-70, ssh@bti.secna.ru, А.Н. Галахов, аспирант, (3854) 43-25-70, galakh@bti.secna.ru

The article proposes a new method of particle coagulation with the help of ultrasonic vibrating system with the radiator in the form of disk step-variable in thickness. For practical application the design procedure of radiators of step-variable type is described.