Cooling intensification of secondary air in air-to-air heat exchange of turbojet bypass engine

Abstract

The article substantiates the need to intensify the process of cooling the elements of gas turbines of modern and promising turbojet bypass engines. Since an increase in the gas  temperature in front of the turbine makes it possible to increase the specific thrust of the engines with unchanged dimensions and weight, this direction is therefore relevant. But an increase in the gas temperature can negatively affect the strength characteristics of the turbine parts, which can lead to a decreasein the reliability of its parts and, as a consequence, to the    premature decommissioning of the engine. In this article, using the example of a turbine cooling system containing an air-to-air heat exchanger, it is proposed to intensify air cooling by installing ribbon flow swirlers in an air-to-air heat exchanger,which will increase the heat transfer coefficient from air to the wall of the heat exchanger tubes and increase the efficiency of turbine cooling.