Today, from the point of view of specific energy consumption and separation efficiency, the most optimal separation devices with the inertial force as the main operating. One of the most common problems of separation devices, the operation of which is based on the separation of gas-droplet flows in the field of inertia forces, is the destruction of the liquid film and secondary droplets splashing of the liquid film from the deposition surfaces. Despite the large number of traditional ways to avoid this drawback (increasing the free section; ensuring regular liquid drainage, etc.), they do not change the critical gas flow rate at which secondary splashing occurs. To solve this problem, it was proposed to use dynamic separation devices, the essence of which is the possibility of dynamic adjustment of hydraulic resistance and the use of superimposed vibrations to efficiency increasing of heterogeneous systems separation. The study of the processes of separation of heterogeneous systems due to the dynamic processes of vibration-inertial separation refers to the scientific and applied problems of industrial engineering. In this regard, it can be argued that the dissertation topic is relevant, has an important scientific and practical significance, since it is aimed at solving an urgent scientific problem that is essential for industrial engineering, the essence of which is to determine the hydrodynamic parameters and hydroaeroelasticity characteristics of dynamic separation devices.
Purpose of the study. The aim of the thesis is to simulate hydrodynamic processes and the interaction of elastic baffle elements and flow in dynamic separation devices, develop methods for calculating hydrodynamic parameters and hydroaeroelastic characteristics of dynamic separation devices and provide practical recommendations for their design and operation.
The object of research is hydrodynamic processes in dynamic separation devices and hydroaeroelastic interaction with elastic elements.
The subject of research is flow hydrodynamics and associated elastic deformations of elements of modular dynamic separation devices.
Scientific novelty.
- for the first time, a solution to the problem of hydroaeroelasticity was obtained for the interaction of a gas-dispersed flow and elastic separation elements in the form of an inclined parabolic half-cylinder, taking into account their preliminary deformation;
- for the first time, dependences were obtained that determine the change in the geometric shape of the sinusoidal channel of a dynamic separation device as a result of hydrodynamic and hydroaeroelastic interaction with the flow;
- for the first time, analytical dependences were obtained for evaluating the values of the stiffness coefficients according to the data of experimental and numerical studies using the methods of the theory of parameter estimation;
- a mathematical model which describes the three-dimensional liquid film downflow over the settling surfaces of dynamic separation devices by introducing simplifications, assumptions and evaluating the order of values smallness was further developed;
- the scientific approach to the rational layouts choice of modular separation devices based on technological and operational parameters, which makes it possible to improve the design and assembling processes while ensuring the necessary operating conditions was further developed.
The practical significance.
- The obtained results of numerical, physical and mathematical modeling of the hydroaeroelastic interaction process of the gas-liquid flow and elastic baffle elements can be used for engineering calculation of modular dynamic separation devices.
- developed a modern problem-oriented approach to coding modular separation devices according to design, technological and operational characteristics.
- The design of the elements of modular separation devices has been substantiated, which ensure the required assembly accuracy, the efficiency of the device operation and the implementation of the working process.
- on the basis of the obtained results, new methods of gas-liquid mixtures separation were proposed, protected by useful model patents (No. U102445, U130464, U111039). The main dissertation results were introduced into the production activities of PROM-ENERGO PRODUCT LLC (Kharkov) and Agrarnik LLC (Sumy), used in the implementation of state budget No. 0117U003931 “Development and implementation of energy-efficient modular separation devices for oil and gas and cleaning equipment”, №0120U102036" Creation of new granular materials for nuclear fuel and catalysts in an active hydrodynamic media" and introduced into the educational process of Sumy State University.
Keywords: heterogeneous mixtures, separation, vibration-inertial methods, elastic elements, hydro aeroelasticity, vibration frequency, amplitude, liquid film, previously-deformed state.
