Search academic texts

Information × Registration Number 0220U100335, 0119U102560 , R & D reports Title Reducing pollutant emissions through energy efficient sealing solutions popup.stage_title Head Zahorulko Andrii V., Registration Date 15-01-2020 Organization Sumy State University popup.description2  The object of study is the hydro-gas dynamic and thermal processes occurring in the lubricating layer of the face impulse seals of high-speed centrifugal machines. The purpose of the work is to compare of the traditional mechanical face seals characteristics and innovative sealing solutions based on surface texturing to provide a fluid pressure impulse and friction and wear reducing through experiments and modeling. Research methods - the numerical finite volume and finite element methods for solving of the hydro-gas dynamics equations, heat transfer and elasticity theory; the numerical design of experiment (DOE) methods for determining of the theoretical dependencies between tribological characteristics and the geometry of friction units; the experimental investigation methods for checking of operating efficiency and tribological characteristics determination of face impulse seals; the oscillation theory methods for the analysis of the dynamic characteristics of an axially-movable ring of a impulse seal. Methods of static and dynamic analytical calculations, based on the solution of the equations of the Hagen-Poiseuille flow, the continuity, the balance of forces and the equations of body motion and the design of the face impulse seals have been developed. Comparison of the numerical simulation results of the non-stationary fluid flow in the clearance and the solution of the thermal problem for face impulse seal using of the computational fluid dynamics (CFD) methods using the ANSYS Academic Research CFD software with available experimental data and results of analytical calculations was performed. Using the design of experiment (DOE) methods, the main relationships between tribological characteristics and geometric parameters of seals were obtained. Calculations of fluid flow in the face impulse seal by numerically solving the Reynolds equations of hydrodynamic lubrication theory with cavitation and comparing the obtained results with the results of calculations. Product Description popup.authors Lisovenko Dmutro V. popup.nrat_date 2020-04-02 Close