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Optimization of Root Section for Ultra-long Steam Turbine Rotor Blade
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SYSNO ASEP 0488804 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Optimization of Root Section for Ultra-long Steam Turbine Rotor Blade Author(s) Hála, Jindřich (UT-L) RID, ORCID
Luxa, Martin (UT-L) RID, ORCID
Šimurda, David (UT-L) RID, ORCID
Bobčík, M. (CZ)
Novák, O. (CZ)
Rudas, B. (CZ)
Synáč, J. (CZ)Source Title Journal of Thermal Science. - : Springer - ISSN 1003-2169
Roč. 27, č. 2 (2018), s. 95-102Number of pages 8 s. Publication form Print - P Language eng - English Country US - United States Keywords steam turbine ; blade cascade ; root section Subject RIV BK - Fluid Dynamics OECD category Fluids and plasma physics (including surface physics) R&D Projects TA03020277 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) TH02020057 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support UT-L - RVO:61388998 UT WOS 000427726400001 EID SCOPUS 85044168773 DOI 10.1007/s11630-018-0989-0 Annotation This study presents the comparison of aerodynamic performances of two successive designs of the root profiles for the ultra-long rotor blade equipped with a straight fir-tree dovetail. Since aerodynamic and strength requirements laid upon the root section design are contradictory, it is necessary to aerodynamically optimize the design within the limits given by the foremost strength requirements. The most limiting criterion of the static strength is the size of the blade cross-section, which is determined by the number of blades in a rotor and also by the shape and size of a blade dovetail. The aerodynamic design requires mainly the zero incidence angle at the inlet of a profile and in the ideal case ensures that the load does not exceed a limit load condition. Moreover, the typical root profile cascades are transonic with supersonic exit Mach number, therefore, the shape of a suction side and a trailing edge has to respect transonic expansion of a working gas. In this paper, the two variants of root section profile cascades are compared and the aerodynamic qualities of both variants are verified using CFD simulation and two mutually independent experimental methods of measurements (optical and pneumatic). Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2019
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