Numerical Simulation of Gas-Dynamics in the Cooling System of the Block-Container of the Gas-Turbine Engine

摘要

To increase the service life of gas-turbine engines, timely ventilationin the block -container, where the turbine is located, is required. To boostthe ventilationefficiency, it is desirable to know the dynamics of the process of heating o f the inner zone of the engine block and to monitor its conditions during operation. The overheating of the space inside the block-container because of poor ventilation as a reason of getting out of order control measure systems, the often engine stops that's consequence red ucing life, and increase in the cost of gas, electricity, heat. Known dimensional models of overheating of the space inside of engine block are analyzed. The work presents the problem description, mathematical principles, and the numerical results of a 2- D modelling. The mixed thermal transfer models in the closed area in the parallelepiped form with a local heating of a cylindrical surface, simulating a block-container of a gas-turbine engine, are described. The paper presents theoretical solutio ns that increase the reliability of the unit by providing the required temperature conditions in the block-container of the power unit.