Journal of Siberian Federal University. Engineering & Technologies / Experimental Research of SGT‑600 Gas Turbine Cooled Blades Thermal Characteristics

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Issue
Journal of Siberian Federal University. Engineering & Technologies. 2025 18 (1)
Authors
Shevchenko, Igor V.; Rogalev, Andrey N.; Osipov, Sergey S.; Bryzgunov, Pavel A.; Shevchenko, Mikhail I.
Contact information
Shevchenko, Igor V. : National Research University “Moscow Power Engineering Institute” Moscow, Russian Federation; Rogalev, Andrey N. : National Research University “Moscow Power Engineering Institute” Moscow, Russian Federation; Osipov, Sergey S.: National Research University “Moscow Power Engineering Institute” Moscow, Russian Federation; Bryzgunov, Pavel A. : National Research University “Moscow Power Engineering Institute” Moscow, Russian Federation; ; Shevchenko, Mikhail I. : National Research University “Moscow Power Engineering Institute” Moscow, Russian Federation
Keywords
gas turbine; cooled blades; thermal testing of cooled blades; calorimetry method in a liquid metal thermostat; reverse engineering
Abstract

This article is dedicated to the experimental studies of the thermal and hydraulic characteristics of cooled blades in a gas turbine power plant. The review analyzed the main factors determining the thermally stressed state of the blades, as well as their thermal-hydraulic efficiency. Two design variants of cooled working blades of the first stage of the Siemens SGT600 gas turbine were considered as study objects. Hydraulic studies revealed that the second blade variant has 15 % higher throughput compared to the first. Thermal tests using the calorimetry method in a liquid- metal thermostat determined the thermal characteristics of the blade cooling systems. It was found that, due to the presence of inclined fins in the cooling channel of the leading edge of the blade in the second configuration and a change in the radius ratio, the heat exchange intensity increases by 50–60 % compared to the first variant. A comparison of heat flows in similar sections of the blades showed that the heat removal intensity in the channels of the blade’s trailing edge in the second configuration is on average 25–40 % higher than in the first blade’s channels. To generalize the obtained experimental data, criterion dependencies were formed for calculating local heat transfer coefficients in the blade cooling channels, which can be used to calculate the thermal fields of the blades and determine safety margins under operating conditions

Pages
33–43
EDN
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Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/154404

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