Вплив режимних і геометричних характеристик на ефективність проточної частини ЦВТ потужної парової турбіни

• Date: 2025
• Main Authors: Rusanov, Roman, Rusanov, Andrii, Shvetsov, Viktor, Chugay, Marina, Tretiak, Sergii
• Format: Article
• Language: English
• Published: General Energy Institute of the National Academy of Sciences of Ukraine 2025
• Subjects: атомна електростанція; парова турбіна; циліндр високого тиску; газодинамічна ефективність; характеристики ступенів.
• Online Access: https://systemre.org/index.php/journal/article/view/895
• Journal Title: System Research in Energy

The results of a research of the various operating and geometric parameters influence on the efficiency of the high-power steam turbine high-pressure cylinder flow part for nuclear power plants is presented in the paper. The purpose of the research is to determine the rational characteristics of the high-pressure cylinder flow part to ensure its high gas-dynamic efficiency. Seven options of a high-pressure cylinder with different numbers of stages, designed for the characteristics of the promising AP1000 nuclear reactor, were considered. The research was caried out using modern methods of gas-dynamic calculation and designing of turbomachine flow parts, implemented in the IPMFlow software package. As a result of the analysis, rational values of the main characteristics of the stages, such as the dimensionless conditional rate of thermal drop, the ratio of the circular velocity of the rotor grid to the conditional thermal drop rate, and the effective angle of the stator in absolute motion, at which the greatest gas-dynamic efficiency is achieved, were established. The influence of the "diffusivity" of the meridional contours between the penultimate and last stages on the flow structure and gas-dynamic efficiency was analyzed. Among the considered options, the five-stage high-pressure cylinder has the lowest total kinetic energy losses and outlet velocity losses, which provides it with the highest total gas-dynamic efficiency. High-pressure cylinder with four stages has slightly worse gas-dynamic efficiency compared to the five-stage flow part, but, due to the smaller number of stages, it has lower metal consumption and cost. The results of the research can be used in the designing and modernization of domestically produced steam turbine equipment, which will contribute to increasing the competitiveness and energy security of Ukraine.