Объектно-ориентированная комплексная оптимизация проточной части мощной паровой турбины

Abstract

Thesis for degree of Candidate of Sciences in Technique for speciality 05.05.16 – turbomachine and turbine-installations. – National Technical University "Kharkiv Polytechnical Institute", Kharkiv, 2015. This thesis deals with the development of object-oriented methodology for complex optimization of the flow path of powerful steam turbines based on joint calculations of the thermal and gasdynamic processes in the elements of the steam turbine's flow path. Due to the constant growth of the consumption of the electricity by society, it is necessary to design new one or modernize the existing steam turbines. To improve the efficiency of steam turbines the methodology of object-oriented complex optimization of the flow path of powerful steam turbines is developed. The mathematical model of the thermal and gasdynamic processes for combined calculating of the nozzle steam distribution, equalizing chamber, and multicylinder turbine flow path is improved. In this work the methods for determining pressure losses in the regulating chamber with respect to operational and design parameters are developed. The dependence of loss factor and the blade outflow angle on the size of the original trimmed edge is obtained. It is also assessed the impact of changes of axial gap downstream stator and the fluid supply circuit to the nozzle segments on the stage efficiency. This model is included to the integrated information space CAD "Turboagregat". Developed methodology is implemented while optimization of the K-310–240 turbine. As result, it power increases by 6,179 MW, and the absolute efficiency of the cycle - by 0,83%.