Baha V. Improvement of calculation and design methods of pneumatic shaft seals based on workflow simulation

The thesis offers improved view on workflow and methods of the design of labyrinth seals that increase their performance, reliability, profitability and service life. The visualizations of workflow were obtained. The element approach to description of workflow in labyrinth seal was developed. It considers the seal as composition of holes with individual characteristics. This approach allowed determination of existence of abnormal phenomena in flow section of multislot labyrinth seal in the form of fluctuations of parameters of a stream. These are zones with various regimes of a vortex-type flow. Graphical relationships and equations for description of influence of various factors on characteristics of the seal are determined. The equations take into account some factors which were negligible earlier. The correction coefficients for separate types of losses are calculated by method of identification of seal mathematical model. The comparative analysis on influence of properties of gases was performed. A set new and improved data about choice of geometry of labyrinth seals are represented in the thesis. The increase in geometrical volume of broad cameras of the seal in the direction of gas flow is offered.