Теорія і практика використання циклонів на деревообробних підприємствах
| Autor: | A. V. Lyashenyk, Ye.M. Lyutyi, Yu. R. Dadak, L. O. Tysovskyi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Numerical analysis
Nozzle Airflow циклон запилене повітря математичне моделювання аеродинамічних процесів рівняння нав'є-стокса Aerodynamics Conical surface Mechanics Static pressure Physics::Fluid Dynamics Continuity equation General Earth and Planetary Sciences Cylinder lcsh:SD1-669.5 lcsh:Forestry Physics::Atmospheric and Oceanic Physics Geology General Environmental Science |
| Zdroj: | Науковий вісник НЛТУ України, Vol 29, Iss 10, Pp 97-103 (2019) |
| ISSN: | 2519-2477 1994-7836 |
| Popis: | The paper describes some characteristics of the main types of cyclone collectors used in the woodworking industry and contains their comparative analysis. The existing approaches to mathematical modeling of aerodynamic processes in cyclone collectors, their drawbacks and benefits are described. A new mathematical model of the polluted air flow inside a separator is created, based on the joint consideration of the Navier-Stokes equations for a viscous compressible liquid (gas), the equation of continuity, state equations and equations of heat balance. The initial and boundary conditions are written for a CN-15 cyclone. They have solved the complete system of differential equations in partial derivatives and studied the influence of the geometric dimensions of the separator (cylinder height, conic height, diameter of the dust nozzle, diameter of the exhaust pipe, submersion depth of the exhaust pipe, distance from the exhaust pipe to the edge of the conical part) on operational parameters of the unit (hydraulic resistance, static pressure). They have also examined the patterns of the velocity field distribution (full, tangential, axial) of the polluted air flow in different sections of the cyclone depending on its geometry. The results of numerical analysis are confirmed by the experimental research; a good coincidence of results is obtained. Based on the proposed mathematical model of aerodynamic processes in the cyclone collector, the feasibility of changing the geometric dimensions of the air cleaner to increase the unit efficiency has been justified. Numerical analysis of the task was conducted for a cyclone with fixed geometric parameters. The dependence of the hydraulic resistance of the cyclone from such parameters as the height of the cylindrical part, the clay exhaust pipe, the height of the conical part, the diameter of the exhaust pipe, the diameter of the saw blade was studied. The research of the distribution of static pressure inside the cyclone body has been carried out. During the research various diameters related to the choice, as well as various values of the height of the cylindrical part were considered. The field of the velocity of the requested flow of the medium saw blade, its tangential and axial component were researched. On the basis of the developed mathematical model, insulations of the flow velocities in characteristic planes passing through the vertical axis of the cyclone were built. To confirm the adequacy of the proposed mathematical model, the results of numerical analysis are confirmed by the experimental research. For this purpose, the design of an experimental test bench has been developed for carrying out research, which provides the possibility of changing the height of the cylindrical part, the depth of the dipping of the exhaust pipe, the cross-sectional area of the exhaust pipe, and the use of different types of conical part of the bunkers. |
| Databáze: | OpenAIRE |
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