Design And Additive Manufacturing Occurring Of Cooled Wall With Developed Cooling Surface

The design of an aircraft gas turbine engine contains a large number of elements that are subject to significant thermal loads and one of the most important elements is the combustion chamber of the gas turbine engine.To increase the efficiency of the entire system,it is necessary to provide the necessary cooling of the heat-loaded wall.In this thesis,a methodology for improving the cooling efficiency was developed.Thanks to the use of additive technologies,a number of technological restrictions imposed by classical production are removed,which allows significantly increasing the cooling efficiency by creating a more complex geometry of cooling channels.This work is divided into 5 main parts: first,an in-depth review of the literature on existing research in the field of cooling the wall of the combustion chamber of the gas turbine engine,as well as the study of the materials used and production principles.The second part describes the methodology for changing the shape of channels by changing key parameters.Based on this,3main forms of samples for research were determined.The third part describes the issue of numerical simulation of the cooling efficiency of the obtained samples with different channel systems,where the cooling efficiency coefficient was chosen as the evaluation criterion.In the fourth part,we study the issue of producing samples using additive SLM technology,as well as studying them using tomography.In the last part,the issue of verification of the received data is considered,namely,the design of the experimental installation is described.A test program has also been formulated that allows to study a large number of wall samples with different cooling channels.Based on the work done,a methodology for designing a cooling system based on the use of additive technologies was formed.These results clearly reflect the technical novelty of this work and provide reasonable recommendations for the continuation of the development of this design scheme for its further use.