Dmitry V. Genne

Research and development of ultrasonic device prototype for intensification of drying process

In the article theory of ultrasonic drying is stated. The possibility of ultrasonic field creation with intensity about 150 dB by means of disk radiators in closed volume of drying chambers is considered. The prototype of ultrasonic dryer for carrying out experiments on various drying materials is described; results of preliminary experiments on drying of gelatin, peas, fabric and carrots are presented.

Revelation of optimum modes of ultrasonic influence for atomization of viscous liquids by mathematical modelling

In the article the process of cavitation low-frequency (up to 250 kHz) ultrasonic atomization of viscous liquids in a layer is investigated. It takes place with entering of acoustic energy to working zone through liquid. To reveal optimum modes of ultrasonic influence depending on physical properties of atomized liquid (viscosity, surface tension, etc.) the model describing stepwise transformation of mechanical vibration energy of ulrtasonic frequency into energy of capillary waves providing the formation of drops was proposed and developed. For the first time we offer theoretical explanation of essential dependence of drop diameter on vibration amplitude of spraying surface based on changes of mean thickness of ridges of capillary waves according to their amplitude due to occurence of nonlinear effects. Obtained results can be a base for the design of specialized ultrasonic atomizers of liquids with high viscosity for the formation of aerosols with specified productivity and dispersed features.

Method of acoustic load control

The problems of indirect determination of parameters, which are directly connected with the value and the character of acoustic resistance of the media exposed to ultrasound, are discussed. This method for control of acoustic media parameters is based on control of electric parameters of ultrasonic vibrating systems, which are in contact with the processed technological media.

The development of experimental sample of ultrasonic equipment for the intake of lunar soil

The article is devoted to the development of experimental sample of ultrasonic equipment for carrying out investigations on drilling of the simulator of lunar soil. Carried out studies show possibility in principle of drilling of the simulator (intake) of lunar soil at application of ultrasonic vibrations on working tool.

Determination of the concentrations of water solutions during their cavitation processing

The article is devoted to design and study of the method of indirect control of the parameters of liquid technological media in the form of water solutions of glycerin, saccharose, NaCl subject to ultrasonic action. The base of developed method is the revealed before dependences of the electric parameters of the piezoelectric transducer of the ultrasonic vibrating system on physical characteristics of technological media under ultrasonic action in the cavitation mode.

Automated line for ultrasonic spraying of anticoagulant into the blood collection tubes

Results of the work on creation of an automated line of ultrasonic spraying of anticoagulant on inner surface of blood collection tubes are presented in the article. Designed line provides automatic feeding of the tubes, moving them to the zone of spraying and uniformity of spraying, drying. Productivity of the automated line is 1500 products/hour.

Practical investigations of the method for indirect control of acoustic load parameters

Article is devoted to testing of the method for indirect control of acoustic load parameters. The results of measurement of acoustic load parameters are presented.

Development of equipment for fine-dispersed atomization of viscous liquids

The article considers new technology of atomization of viscous liquids from unsteady surface with next additional atomization in spray-type needle moving out aerosol flow was considered. As a result of the researches, high efficiency of realization of secondary atomization was proved and dependences of atomization efficiency on frequency, vibration amplitude and form of the end of spray-type needle were developed. The obtained results of atomization of viscous liquids are evidence of reducing of particles of primarily sprayed aerosol by 3–4 times.

Monitoring of Ultrasonic Generators Parameters for Definition of Optimal Modes of Ultrasonic Influence on Different Medium

This article is devoted to making and usage of a specialized measuring complex for speed up of adjustment and diagnostic process of ultrasonic generators. The results of usage of a complex on specific targets are presented.

The Self-Action Agreement System of Electronic Generator with the Piezoelectric Oscillatory System

In this article variants of agreement of piezoelectric oscillatory system with the electronic generator for self-action maintenance of optimum operating mode are considered. The special device is developed for its implementation.