Complex Calculation Method of Air Cooling Systems of Gas Turbines and Lubrication Systems of Bearing Assemblies

The article is devoted to the improvement of the calculation methodology of air cooling systems and oil supply systems of gas turbine bearings by reasoned selection of boundary conditions and the structure of a homogeneous flow, which allows in the process of developing the support nodes of the engine rotor to determine the influence of geometric and mode parameters on the distribution of oil and the coefficient of heat transfer to the walls of the chamber, which forms an oil cavity. During the simulation, special attention is paid to the physics of the process, since a coolant with different properties can move in the channels of the cooling system, namely: liquid (oil), gas (air), or an air-oil mixture. If there is a two-phase substance in the channel, then the properties depend not only on the amount of gas content, but also on the orientation and geometric characteristics of the channels through which it flows.